Transcript 2012 International Energy Conservation Code Update with
2012 International Energy Conservation Code Update with Maryland Amendments
Based on the 2012 International Energy Conservation Code ®
,
(IECC ® ) Maryland Code Administration
Description
This seminar introduces participants to the major changes from the 2009 IECC to the 2012 IECC with an emphasis on the increase in energy efficiency improvements. Participants will discuss the changes and reasons for the changes. Information presented will allow participants to apply these new code requirements to design, plan review, and/or inspection. Handout page 1 2012 IBC Update 2
Marginal Markings within the codebook * **
Solid vertical lines
indicate a technical change from the requirements of the 2009 edition.
Arrows
indicate where a section, paragraph, item in a list, exception or table has been deleted.
A single asterisk
[*] indicates that text or a table has been relocated elsewhere in the code.
A double asterisk
[**] indicates that the section or table immediately following has been relocated here from a different section. 2012 IECC Update 3
The new Code Development Process
Highlights of the plan include:
Maintains 3-year publication cycle Maintains the ICC Governmental Consensus Process Divides the codes into two groupings for purposes of Code Development and Final Action Hearings – one group heard each year.
An unveiling of all the new codes at the Annual Conference in the third year Holding Code Development Hearings at the same central location every April/May Holding all Final Action Hearings at the Annual Conference at locations which will continue to rotate through the four quadrants of the U.S. in late October/early November. 2012 IECC Update 4
Letter Designations in Front of Section Numbers
The two groups of codes and deadlines for proposals are: Group A Codes – IBC, IFGC, IMC, IPC, IPSDC Proposals due January 3, 2012 Group B Codes – Admin, IEBC, IECC, IFC, IGCC, IPerfC, IPoolC, IPMC, IRC, IWUIC, IZC. Proposals due January 3, 2013 Each grouping having Code Development and Final Action Hearings occurring in the spring and fall of the same year during the first two years of the publication cycle 2012 IECC Update 5
Letter Designations in Front of IECC Section Numbers
The content of sections that begin with a letter designation is maintained by another code development committee:
[CE] = Commercial Energy Code Development Committee [M] = Mechanical [RE] = Energy Code Development Committee
2012 IECC Update 6
Maryland Provisions
Three Part Process 2012 IBC Update 7
Climate Zones Maryland 4 and 5
2012 IECC Update 8
Annotated Code of Maryland
Enabling legislation that creates the framework for the Maryland Building Performance Standards.
Public Safety Article TITLE 12. BUILDING AND MATERIAL CODES; OTHER SAFETY PROVISIONS SUBTITLE 5. MARYLAND BUILDING PERFORMANCE STANDARDS
2012 IBC Update 9
Duties of the Maryland Codes Administration (COMAR)
Must adopt as part of the Standard (MBPS) the IBC, the IRC and the IECC within 12 months of the issuance by ICC.
Amendments to the IBC and IRC may not be more stringent than the provisions found in those documents.
Amendments to the IECC must not lessen any of the IECC requirements.
2012 IBC Update 10
Local Jurisdiction Amendments
Local Amendments must not prohibit the minimum implementation and enforcement set forth in §12-505 Review and accept plans Issuance of building permits Inspection of the work authorized by building permit Issuance of appropriate occupancy certificates 2012 IBC Update 11
Local Jurisdiction Amendments
Local Amendments must not prohibit the minimum implementation and enforcement set forth in §12-505 Review and accept plans Issuance of building permits Inspection of the work authorized by building permit Issuance of appropriate occupancy certificates Weaken energy conservation and efficiency provisions of the Standards 2012 IBC Update 12
Local Jurisdiction Implementation and Enforcement
Local jurisdictions
SHALL
implement and enforce the most current version of the standards and any local amendments No later than 6 months after adoption by the State.
2012 IBC Update 13
Key Maryland Dates
COMAR adoption of the 2012 IBC:
January 1, 2012
Local implementation and Enforcement:
July 1, 2012
Local amendments to Maryland Codes Administrations:
15 days prior to local effective date
Or 5 days after emergency local adoption
2012 IBC Update 14
COMAR 05.02.07.03 B. Terms.
New term “High performance home” has the meaning stated in Public Safety Article, §12-509(a), Annotated Code of Maryland
§ 12-509. Encouragement of high-performance homes (a) "High-performance home" defined. -- In this section, "high performance home" means a new residential structure that meets or exceeds the current version of: (1) the Silver rating of the International Code Council's 700 National Green Building Standards; or (2) the Silver rating of the U.S. Green Building Council's LEED (Leadership in Energy and Environmental Design) for Homes Rating System.
2012 IBC Update 15
2012 IECC COMAR Modifications
Modifications to the 2012 International Energy Conservation Code. Add a note to Section C101, Scope and General Requirements: Additional requirements concerning energy conservation for buildings and structures may be required by the Energy Conservation Building Standards, Public Utilities Article, §§7-401 – 7-408, Annotated Code of Maryland, as amended.
2012 IBC Update 16
COMAR 05.02.07.04 E
New Section added as follows: E. The Department encourages: (1) Home builders to construct new high performance homes; and (2) Local jurisdictions to amend these standards to allow builders to construct high performance homes.
2012 IBC Update 17
COMAR Modifications to the IBC and IRC
Additional modifications are made as part of the Maryland Building Performance Standards to the IBC and the IRC. Those modifications are part of the Update Classes for the IBC and IRC are being offered by the Maryland Codes Administration through the International Code Council.
2012 IBC Update with Maryland Amendments 18
Compliance Process
Must the project comply with the IECC?
Mandatory Provisions Air Leakage and Building Systems Performance Path Prescriptive Path Building Thermal Envelope and Electrical Simulated Performance Alternative
R-
value Computation UA Alternative Total UA Alternative Document Compliance with IECC Plan Review Field Inspection Handout page 6 19
IECC Plan Review
1.
2.
3.
4.
5.
6.
Determine IECC mandatory provisions for air leakage and building systems are met.
Determine if either the prescriptive path or simulated performance path is used. Determine IECC prescriptive provisions are met for the building thermal envelope and electrical.
Determine if either the R-value computation, UA alternative or Total UA alternative is used.
1.
Determine IECC provisions for R-value computation are met.
2.
3.
Determine IECC provisions for UA alternative are met.
Determine IECC provisions for Total UA alternative are met.
Determine if the provisions for the simulated performance alternative are met.
Document compliance for field inspection staff.
2012 IBC Update with Maryland Amendments 20
Foundation Inspection • Exterior Insulation Inspection • Structural Insulated Panel Foundation Inspection • Insulated Concrete Forming Systems Inspection • Pre-cast Insulated Concrete System Inspection • Crawl space Wall Inspection
Field Inspection
Rough Inspection • Air Barrier Inspection • Sealing Inspection • Fenestration Inspection • Insulation Inspection • Mechanical Inspection • Concealed Service Water Heating System Inspection Final Inspection • Insulation –Inspections (4) • Mechanical – Inspections (5) • Service Water Heating Inspections (3) • Snow Melt Controls Inspection • Swimming Pool Inspections (3) • Certificate Inspection
Non compliance Compliance Non compliance Compliance Certificate of Occupancy
2012 IECC Update 2012 IBC Update with Maryland Amendments
Non compliance Compliance
21 21
IECC Inspection
1.
Determine compliance method used for project.
2.
Field inspections will normally occur at the following stages; 1.
2.
3.
Foundation/Slab inspection Rough Inspection Final Inspection 3.
Verify during the required inspections that the project complies with the prescriptive or performance provisions as determined during the Plan Review
2012 IBC Update with Maryland Amendments 22
IECC Inspection
5.
1.
2.
3.
4.
5.
Verify compliance with mandatory provisions of the code; Air Leakage HVAC System Controls Duct Sealing Mechanical System Piping Circulating Hot Water Systems.
6.
7.
8.
Mechanical Ventilation, equipment sizing Swimming pool heating, time switches and covers.
Lighting Equipment 6.
Verify third party inspection for sealing of Building Thermal Envelope and
•
Duct tightness are within code specified limits.
(Duct Tightness testing not required when ducts and air handlers are entirely within the building thermal envelope.)
2012 IBC Update with Maryland Amendments 23
IECC Inspection
5.
6.
Verify compliance with mandatory provisions of the code; 1.
2.
3.
4.
5.
Air Leakage HVAC System Controls Duct Sealing Mechanical System Piping Circulating Hot Water Systems.
6.
7.
8.
Mechanical Ventilation, equipment sizing Swimming pool heating, time switches and covers.
Lighting Equipment
•
Verify third party inspection for sealing of Building Thermal Envelope and Duct tightness are within code specified limits.
(Duct Tightness testing not required when ducts and air handlers are entirely within the building thermal envelope.)
2012 IBC Update with Maryland Amendments 24
Arrangement and format of the 2012 IECC
The IECC contains two separate sets of provisions.
The IECC —Residential Provisions apply to detached one- and two-family dwellings and multiple single family dwellings as well as Group R-2, R-3 and R-4 buildings three stories or less in height. The IECC —Commercial Provisions apply to all buildings that are not included in the definition of “Residential buildings”. Handout page 2 2012 IECC Update 25
Arrangement and format of the 2012 IECC
IECC —Commercial Provisions, therefore, contain provisions for residential buildings four stories or greater in height.
2012 IECC Update Handout page 2 26
Arrangement and format of the 2012 IECC
Each set of provisions is independent; containing a chapter in: Scope and Administration, Definitions, General Requirements and Energy Efficiency Requirements applicable to buildings within its scope.
Handout page 2 2012 IECC Update 27
Table of Contents
2012 IECC Update Handout page 2 28
Chapter 1
Scope and Administration
2012 IECC Update 29
Chapter 1 Scope and Administration
Changes Identical for both Commercial and Residential 2012 IECC Update 30
Chapter 1 Scope and Administration
Chapter 1: Scope and Administration Code Section 2012 2009 Section Title Description of Change C 101.2
C 101.3
C106 R 101.2
R 101.3
R106 101.2
101.3
106.1
Scope Intent Referenced Standards Added building site and associated systems and equipment Added that the regulation of the code will conserve energy over useful life of the each building.
Added information on conflicts and provisions in referenced codes and standards Handout page 3 2012 IECC Update 31
Chapter 1 Scope and Administration
1. What will conserve energy over the useful life of each building?
Constructing and using the mechanical systems, service water-heating systems, and electric power and lighting systems located on the building and on the building site in accordance with this code.
2012 IECC Update 32 Handout page 2\3
Chapter 2
Definitions
2012 IECC Update 33
Chapter 2 Definitions
NEW for Commercial Buildings Building commissioning
A process that verifies and documents that the selected building systems have been designed, installed and function according to the owner’s project requirements and construction. Handout page 3 2012 IECC Update 34
Chapter 2 Definitions
NEW for Commercial Buildings Building entrance
Any door, set of doors, doorway or other form of portal that is used to gain access to the building from outside by the public.
Handout page 3 2012 IECC Update 35
Chapter 2 Definitions
NEW for Commercial/Residential Building site
A contiguous area of land that is under the ownership or control of one entity.
36 2012 IECC Update Handout page 3
Chapter 2 Definitions
NEW for Commercial Buildings Coefficient of performance (COP) — Cooling
The ratio of the rate of heat removal to the rate of energy input, in consistent units, for a complete refrigerating system or some specific portion of that system under designated operating conditions.
Handout page 3 2012 IECC Update 37
Chapter 2 Definitions
NEW for Commercial Buildings Coefficient of performance (COP) — Heating
The ratio of the rate of heat removal to the rate of heat delivered to the rate of energy input, in consistent units, for a complete heat pump system, including the compressor and, if applicable, auxiliary heat, under designated operating conditions.
Handout page 3 2012 IECC Update 38
Chapter 2 Definitions
NEW for Commercial/Residential Continuous air barrier
A combination of materials and assemblies that restrict or prevent the passage of air through the building thermal envelope.
39 2012 IECC Update Handout page 3
Chapter 2 Definitions
NEW for Commercial/Residential Demand recirculation water system
A water distribution system where pump(s) prime the service hot water piping with heated water upon demand for hot water.
40 2012 IECC Update Handout page 3
Chapter 2 Definitions
NEW for Commercial Dynamic glazing
Any fenestration product that has the fully reversible ability to change its performance properties, including
U
-factor, solar heat gain coefficient (SHGC), or VT.
Handout page 3 2012 IECC Update 41
Chapter 2 Definitions
NEW for Commercial Enclosed space
A volume surrounded by solid surfaces, such as walls, floors, roofs and openable devices, such as doors and operable windows.
2012 IECC Update Handout page 3 42
Chapter 2 Definitions
NEW for Commercial Equipment room
A space that contains electrical equipment, mechanical equipment, machinery, water pumps or hydraulic pumps that are a function of the building’s services.
Handout page 3 2012 IECC Update 43
Chapter 2 Definitions
NEW for Commercial Fenestration product, field fabricated
A fenestration product whose frame is made at the construction site of standard dimensional lumber or other materials that were not previously cut, or otherwise formed with the specific intention of being used to fabricate a fenestration product or exterior door. Field fabricated does not include site-built fenestration.
Handout page 4 2012 IECC Update 44
Chapter 2 Definitions
NEW for Commercial/Residential Fenestration product, site-built
A fenestration designed to be made up of field glazed or field-assembled units using specific factory cut or otherwise factory formed framing and glazing units. Examples of site-built fenestration include storefront systems, curtain walls, and atrium roof systems.
Handout page 4 2012 IECC Update 45
Chapter 2 Definitions
NEW for Commercial Furnace electricity ratio
The ratio of furnace electricity use to total furnace energy computed as ratio = (3.412 ×
E AE
)/1000 ×
E f
+ 3.412 ×
E AE E AE
) (average annual auxiliary electrical consumption)
E f
(average annual fuel energy consumption)
E f
is expressed in millions of Btu’s per year.
Handout page 4 2012 IECC Update 46
Chapter 2 Definitions
NEW for Commercial
General lighting Lighting that provides a substantially uniform level of illumination throughout an area. General lighting shall not include decorative lighting or lighting that provides a dissimilar level of illumination to serve a specialized application or feature within such area.
Handout page 4 2012 IECC Update 47
Chapter 2 Definitions
NEW for Commercial
Integrated part load value (IPLV) A single-number figure of merit based on part-load energy efficiency ratio (EER), COP, or kW per ton expressing part-load efficiency for airconditioning and heat pump equipment on the basis of weighted operation at various load capacities for equipment.
Handout page 4 2012 IECC Update 48
Chapter 2 Definitions
NEW for Commercial
Nonstandard part load value (NPLV) A single-number part-load efficiency figure of merit calculated and referenced to conditions other than IPLV conditions, for units that are not designed to operate at ARI standard rating conditions.
Handout page 4 2012 IECC Update 49
Chapter 2 Definitions
NEW for Commercial On-site renewable energy
Energy derived from solar radiation, wind, waves, tides, landfill gas, biomass, or the internal heat of the earth. The energy system providing on-site renewable energy shall be located on the project site. 2012 IECC Update 50
Chapter 2 Definitions
NEW for Commercial/Residential Visible Transmittance (VT)
The ratio of visible light entering the space through the fenestration product assembly to the incident visible light. VT includes the effects of glazing material and frame and is expressed as a number between 0 and 1 Handout page 4 2012 IECC Update 51
Chapter 2 Definitions
NEW for Residential Whole House Mechanical Ventilation System
An exhaust system, supply system, or combination thereof that is designed to mechanically exchange indoor air with outdoor air when operating continuously or through a programmed intermittent schedule to satisfy the whole house ventilation rates Handout page 4 2012 IECC Update 52
Chapter 2 Definitions
REVISED for Commercial/Residential Building
Any mechanical systems, service water heating systems and electric power and lighting systems located on the building site and supporting the building.
Handout page 4 2012 IECC Update 53
Chapter 2 Definitions
REVISED for Commercial/Residential Residential Building
Revised to clarify that it includes one- and two-family dwellings and multiple single family dwellings (townhouses).
2012 IECC Update Handout page 4 54
Chapter 2 Definitions
REVISED for Commercial/Residential
Skylight Revised to “slope less than 60 degrees (1.05 rad ).” 2012 IECC Update Handout page 4 55
Chapter 2 Definitions
2. What is the difference between building and building site?
A building is any structure used or intended for supporting or sheltering any use or occupancy, including any mechanical systems, service water-heating systems, and electric power and lighting systems located on the building site and supporting the building. A building site is a contiguous area of land that is under the ownership or control of one entity.
Handout page 5 2012 IECC Update 56
Chapter 2 Definitions
3. What is a whole-house mechanical ventilation system?
Whole-house mechanical ventilation system is an exhaust system, supply system or combination thereof that is designed to mechanically exchange indoor air with outdoor air when operating continuously or through a programmed intermittent schedule to satisfy the whole-house ventilation rates.
Handout page 5 2012 IECC Update 57
Chapter 2 Definitions
4. What is a continuous air barrier?
A combination of materials and assemblies that restrict or prevent the passage of air through the building thermal envelope.
58 2012 IECC Update Handout page 5
Chapter 3
General Regulations
2012 IECC Update 59
Chapter 3 General Requirements
REVISED for Commercial/Residential Materials, Systems and Equipment
Revised to give three options. 1. ANSI/ASHRAE/IESNA 90.1; 2. The requirements of Sections C402 through C405; 3. The requirements of Sections C402.4, C403.2, C404, C405.4, C405.6 and C405.7.
Handout page 5 2012 IECC Update 60
Chapter 3 General Requirements
REVISED for Commercial/Residential
C303.1.3/R303.1.3 Fenestration product rating: “Label or Table” 2012 IECC Update Handout page 5 61
Chapter 3 General Requirements
Label or Table Solutions N
ational
F
enestration
R
ating
C
ouncil Component Modeling Approach (CMA) for site-built commercial windows.
Field Labeling available for missing labels. 62 2012 IECC Update Handout page 5
Chapter 3 General Requirements
REVISED for Commercial/Residential
C303.1.3/R303.1.3 Fenestration product rating Tables C303.1.3(3)& R303.1.3(3) Default Glazed Fenestration Include visible transmittance (VT) 63 2012 IECC Update Handout page 5-6
Chapter 3 General Regulations
5. What is the importance of VT values?
Visible transmittance (VT) indicates the effects of glazing material and frame.
2012 IECC Update Handout page 6 64
Chapter 3 General Regulations
6. What is the VT value for a double glazed, tinted window?
Visible transmittance (VT) for a double glazed, tinted window is 0.3
65 2012 IECC Update Handout page 6
Chapter 4
Commercial Energy Efficiency
2012 IECC Update 66
Section C401 General
REVISED
The section has been revised for clarity. Compliance with ANSI/ASHRAE/IESNA 90.1 is still an acceptable alternative.
2012 IECC Update Handout page 6 67
Section C402 Building Envelope Requirements
REVISED
Building envelope performance are more stringent. For example: 1.
2.
3.
4.
Roof solar reflectance and thermal emittance.
Insulation performance is improved.
Fenestration performance allows more flexibility.
Air leakage requirements expanded.
Handout page 6 2012 IECC Update 68
Table R402.1.1 Insulation & fenestration requirements by component
REVISED
Fenestration and skylight U-factors are improved.
Ceiling insulation R-values increase: R-30 to R-38 in Climate Zones 2 and 3, and R-38 to R-49 in Climate Zones 4 and 5.
Wall insulation R-values increase from R-13 to R-20 or R-13 + 5 in Climate Zones 3 and 4.
Note h clarified regarding continuous isolation.
Add SHGC 0.40 requirement for windows in Climate Zone 4.
Handout page 17 2012 IECC Update 69
Table R402.1.1 Insulation & fenestration requirements by component Maryland Climate Zones 4 and 5
Handout page 17 2012 IECC Update 70
Table R402.1.1 Insulation & fenestration requirements by component
Note h. First value is cavity insulation, second is continuous insulation or insulated siding, so “13+5” means R-13 cavity insulation plus R-5 continuous insulation or insulated siding. If structural sheathing covers 40 percent or less of the exterior, continuous insulation
R-value shall be permitted to be reduced by no more
than R-3 in the locations where structural sheathing is used – to maintain a consistent total sheathing thickness.
Handout page 17 2012 IECC Update 71
Table R402.1.1 Insulation & fenestration requirements by component
2012 IECC Update 72
Table R402.1.3 Equivalent U-Factors
REVISED
Data and footnotes changed.
2012 IECC Update Handout page 17 73
Table R402.1.3 Equivalent U-Factors
2012 IECC Update 74
R402.1.4 Total UA alternative.
If the total
building thermal envelope UA (sum of U-factor times assembly area) is
less than or equal to the total UA resulting from using the
U-factors in Table R402.1.3 (multiplied by the same
assembly area as in the proposed building), the building shall be considered in compliance with Table R402.1.1.
The UA calculation shall be done using a method consistent with the ASHRAE
Handbook of Fundamentals and
shall include the thermal bridging effects of framing materials. The SHGC requirements shall be met in addition to UA compliance.
2012 IECC Update 75
Table C402.2.1.1
NEW
2012 IECC Update Handout page 6 76
C402.2.6 Slabs on grade
REVISED
Added exception that where the slab-on grade floor is greater than 24 inches (61 mm) below the finished exterior grade, perimeter insulation is not required.
2012 IECC Update Handout page 6 77
C402.2.8 Insulation of radiant heating systems
NEW
Radiant heating design information added and the bottom surfaces of floor structures incorporating radiant heating shall be insulated.
Handout page 6 2012 IECC Update 78
C402.3.1 Maximum area
REVISED
Excludes opaque spandrel panels also in vertical fenestration areas, which shall not exceed 30 percent of the above-grade wall area. The skylight area shall not exceed 3 percent of the gross roof area.
2012 IECC Update Handout page 6 79
C402.3.1.1 Increased vertical fenestration area with daylighting controls
NEW
In Climate Zones 1 through 6, a maximum of 40 percent of the gross above-grade wall area shall be permitted, provided three items are adhered to and added exception.
2012 IECC Update Handout page 7 80
C402.3.1.2 Increased skylight area with daylighting controls
NEW
Skylight area increased from 3 to 5 percent with automatic daylighting controls.
2012 IECC Update Handout page 7 81
Section C402.3.2 Minimum skylight fenestration area
NEW
Certain spaces greater than 10,000 square feet (1393 m 2 ) and with ceiling heights greater than 15 feet (4572 mm) are required to provide a total daylight zone under skylights of not less than half the floor area. Handout page 7 2012 IECC Update 82
C402.3.2.1 Lighting controls in daylight zones under skylights
NEW
Lighting in the daylight zone shall be controlled by multilevel lighting controls with exception.
2012 IECC Update Handout page 7 83
Table C402.3.3.1 SHGC Adjustment Multipliers
NEW
Table of SHGC adjustment multipliers 2012 IECC Update Handout page 7 84
C402.3.3.2 Increased vertical fenestration SHGC
NEW
In Climate Zones 1 through 3, vertical fenestration entirely located not less than 6 feet (1729 mm) above the finished floor shall be permitted a maximum of SHGC of 0.40.
2012 IECC Update Handout page 7 85
C402.3.3.3 Increased skylight SHGC
NEW
In Climate Zones 1 through 6 skylights shall be permitted a maximum SHGC of 0.60 where located above daylight zones provided with automated daylighting controls.
Handout page 7 2012 IECC Update 86
C402.3.3.4 Increased skylight U-factor
NEW
Where skylights are installed above daylight zones provided with automatic daylighting controls, a maximum U-factor of 0.9 shall be permitted in Climate Zones 1 through 3, and a maximum U-factor of 0.75 shall be permitted in Climate Zones 4 through 8.
Handout page 7 2012 IECC Update 87
C402.3.3.5 Dynamic glazing
NEW
Dynamic glazing requirements.
Dynamic glazing shall be considered separately from other fenestration, and area-weighted averaging with other fenestration that is not dynamic glazing shall not be permitted.
88 2012 IECC Update Handout page 7
C402.3.4
Area-weighted U-factor
NEW
Area weighted U-factor is permitted to satisfy the U-factor requirements for commercial buildings.
2012 IECC Update Handout page 7 89
C402.4.1 Air barriers
NEW
A continuous air barrier shall be provided throughout the building thermal envelope with exception in Climate Zones 1, 2 and 3.
Handout page 7 2012 IECC Update 90
C402.4.1.1 Air barrier construction
NEW
Construction details of air barriers with exception.
2012 IECC Update Handout page 7 91
Section C402.4.1.2 Air barrier compliance options
NEW
Three options-choose from one or all: Materials Assemblies Building Test 2012 IECC Update Handout page 7 92
Section C402.4.1.2.1 Materials (Option)
NEW Materials deemed to comply if installed properly:
3/8-inch (10 mm) plywood.
3/8-inch (10 mm) OSB.
½-inch (12 mm) Extruded polystyrene.
½-inch (12 mm) Foil backed polyisocyanurate.
1 ½-inch (36 mm) Closed cell spray foam.
4 ½-inches (113 mm) Open cell spray foam ½-inch (12 mm) Gypsum board.
½-inch (12 mm) Cement board.
Handout page 8 2012 IECC Update 93
Section C402.4.1.2.1 Materials (Option) NEW Materials deemed to comply if installed properly:
Built up roofing.
Modified bitumen roofing.
Fully adhered single ply roofing.
5/8- inch (16 mm) Portland sand parge or gypsum plaster.
Cast in place or precast concrete.
Fully grouted block masonry.
Sheet steel or aluminum.
Handout page 8 2012 IECC Update 94
Section C402.4.1.2.2 Assemblies (Option)
NEW
Presumptive compliance if installed properly: Sealed concrete masonry wall units (CMU) or ½-inch (12 mm) parge, stucco or plaster 95 2012 IECC Update Handout page 8
Section C402.4.1.2.3 Building test (Option)
NEW
Building air leakage rate cannot exceed 0.40 cfm/ft 2 at 0.3 inches water gauge (0.2 L/s · m 2 at 75 Pa) in accordance with ASTM E 779. Handout page 8 2012 IECC Update 96
Section C402.4.3 Air leakage of fenestration
REVISED
Fenestration assemblies are required to be NFRC tested and labeled unless: Field Fabricated (note definition) or Entire Building Test per C402.4.1.2.3
Handout page 8 2012 IECC Update 97
Table C402.4.3 MAXIMUM AIR INFILTRATION RATE FOR FENESTRATION ASSEMBLIES
2012 IECC Update 98
C402.4.4 Doors and access openings to shafts, chutes, stairways, and elevator lobbies
NEW
Requirements for doors and access openings from conditioned space to shafts, chutes, stairways and elevator lobbies with exception.
Handout page 8 2012 IECC Update 99
C402.4.5 Air intakes, exhaust openings, stairways and shafts
REVISED
Stairway enclosures and elevator shaft vents, and other outdoor intakes and exhaust openings, integral to the building envelope shall be provided with dampers, whereas before they had to be Class I motorized dampers with maximum leakage rate.
Handout page 8 2012 IECC Update 100
C402.4.5.1 Stairway and shaft vents
NEW
Stairway and shaft vents shall be provided with Class I motorized dampers with max. leakage rate.
101 2012 IECC Update Handout page 8
C402.4.5.2 Outdoor air intakes and exhausts
NEW
Outdoor air supply and exhaust openings shall be provided with Class IA motorized dampers with exceptions.
102 2012 IECC Update Handout page 8
C402.4.7 Vestibules
REVISED
Requirements for vestibules have been clarified; i.e., employee only doors are explicitly exempted.
2012 IECC Update Handout page 8 103
C403 Building Mechanical Systems
NEW
Specific standards for certain heating, ventilation and airconditioning (HVAC) system types.
2012 IECC Update Handout page 8 104
C403.2.3.1 Water-cooled centrifugal chilling packages
NEW
Maximum full load kW/ton and NPLV ratings adjusted using equations was an exception in 2009 IECC.
2012 IECC Update Handout page 8 105
C403.2.3.2 Positive displacement (air and water-cooled chilling packages)
NEW
Positive displacement chilling packages were not covered by the 2009 IECC.
106 2012 IECC Update Handout page 8
Table C403.2.3(8) Heat Rejection Equipment
NEW
2012 IECC Update Handout page 8 107
Table C403.2.3(9) Heat Transfer Equipment
NEW
New table of liquid-to-liquid heat exchangers not requiring a minimum efficiency, listing test procedure with footnote.
EQUIPMENT TYPE SUBCATEGORY MINIMUM EFFICIENCY TEST PROCEDUREa
Liquid-to-liquid heat exchangers Plate type NR AHRI 400 Handout page 8 2012 IECC Update 108
C403.2.4.3.3
Automatic start capabilities
NEW
Automatic start-control requirements.
2012 IECC Update Handout page 8 109
C403.2.5.1 Demand controlled ventilation
REVISED
Changed occupant load to 25 people per 1,000 square feet (93 m 2 ) of floor area; and changed exception requirements.
2012 IECC Update Handout page 8 110
C403.2.6 Energy recovery ventilation systems
REVISED
Changed supply airflow rate and revised exceptions from 2009 IECC.
2012 IECC Update Handout page 9 111
Table C403.2.6 Energy Recovery Equipment
NEW
New table of climate zones to percent of outdoor air for design supply fan airflow rate.
2012 IECC Update Handout page 9 112
C403.2.8 Piping insulation
REVISED
Exception 3 regarding temperature range.
Piping that conveys fluids that have a design operating temperature range between 60 °F (15°C) and 105°F (41°C).
113 2012 IECC Update Handout page 9
C403.2.8.1
Protection of piping insulation
NEW
Piping insulation requirements to protect piping.
2012 IECC Update Handout page 9 114
C403.2.9 Mechanical systems commissioning and completion requirements
NEW
Mechanical systems shall be commissioned and completed in accordance with Section C408.2.
2012 IECC Update Handout page 9 115
C403.2.10.1 Allowable fan floor horsepower
REVISED Exception:
The following fan systems are exempt from allowable fan floor horsepower requirement.
1. Hospital, vivarium and laboratory systems that utilize flow control devices on exhaust and/or return to maintain space pressure relationships.
2. Individual exhaust fans with motor nameplate horsepower of 1 hp or less.
Handout page 9 2012 IECC Update 116
Table C403.2.10.1(2) Fan Power Limitation Pressure Drop Adjustment
Revised data.
DEVICE ADJUSTMENT REVISED Credits
Fully ducted return and/or exhaust air systems
Credits
0.5 inch w.c. (2.15 in w.c. for laboratory and vivarium systems) Biosafety cabinet Energy recovery device, other than coil runaround loop Pressure drop of device at fan system design condition.
(2.2 × energy recovery effectiveness) – 0.5 inch w.c. for each airstream Coil runaround loop 0.6 inch w.c. for each airstream Exhaust system serving fume hoods Laboratory and vivarium exhaust systems in high-rise buildings 0.35 inch w.c.
0.25 inch w.c./100 feet of vertical duct exceeding 75 feet Handout page 9 2012 IECC Update 117
C403.3.1 Economizers
REVISED
Economizer requirements increased.
2012 IECC Update Handout page 9 118
Table C403.3.1(1) Economizer Requirements
REVISED
Climate zones’ economizer requirements and cooling systems greater than 33,000 Btu/h (9,672 W) whereas it was 54,000 Btu/h. (15,827 W). Footnote a revised.
2012 IECC Update Handout page 9 119
Section C403.3.1.1 Air economizers
NEW
Air economizers shall comply with Sections C403.3.1.1.1 through C403.3.1.1.4. Design capacity economizer, air economizers, control signal, high-limit shutoff and relief of excess outdoor air.
Handout page 9 2012 IECC Update 120
Table C403.3.1.1.3(1) High-limit Shutoff Control Options for Air Economizers
NEW
Table lists climate zones and allowed control types for air economizers.
2012 IECC Update Handout page 9 121
Table C403.3.1.1.3(2) High-limit Shutoff Control Setting for Air Economizers
NEW
Table lists device type per climate zone with required high limit noting temperature of outside air to return air; and outdoor temperatures.
122 2012 IECC Update Handout page 9
C403.4.1 Economizers
REVISED
Water economizers shall comply with Sections C403.4.1.1 through C403.4.1.4 for design capacity, maximum pressure drop, integrated economizer control and economizer heating system impact.
2012 IECC Update Handout page 9 123
C403.4.2 Variable air volume (VAV) fan control
REVISED
VAV fans with 7.5-horsepower (5.6 kW) motor requirements, whereas in 2009 IECC it was VAV fans with 10 horsepower (7.5 kW) requirements. Also, additional sections on static pressuresensor location and set points for direct digital control.
Handout page 9 2012 IECC Update 124
C404 Service Water Heating
REVISED
1. Piping insulation requirement beneficial.
2. Controls to be readily accessible.
3. Pools and spas requirement revised.
2012 IECC Update Handout page 9 125
Section C404.5 Piping insulation
REVISED
Added exception to allow manufacturer’s insulation instructions for heat-traced piping systems.
2012 IECC Update Handout page 9 126
Section C 404.6 Hot water system controls
NEW
Added manual operation to circulating hot water system so that pumps or heat trace can be turned off when there is limited hot water demand. Ready access shall be provided to the operating controls.
Handout page 9 2012 IECC Update 127
Section C404.7 Pools and inground permanently installed spas
REVISED
Pools and in ground, permanently installed spas shall comply with Sections C404.7.1 through C404.7.3 regarding heaters, time switches and covers.
Handout page 9 2012 IECC Update 128
Section C405 Electrical Power and Lightning System
REVISED
Lighting Control requirements are expanded.
Space-by-space option added.
2012 IECC Update Handout page 9 129
C405.2.1
Manual lighting controls
REVISED
All buildings shall include manual lighting controls, whereas in the 2009 IECC lighting systems were provided with controls.
2012 IECC Update Handout page 9 130
C405.2.1.2 Light reduction controls
REVISED
Exceptions revised.
2012 IECC Update Handout page 9 131
C405.2.2 Additional lighting controls
REVISED
Added four exceptions.
Additional lighting controls need not be
provided in the following spaces:
1. Sleeping units.
2. Spaces where patient care is directly provided.
3. Spaces where an automatic shutoff would endanger occupant safety or security.
4. Lighting intended for continuous operation.
Handout page 9 2012 IECC Update 132
C405.2.2.2 Occupancy sensors
NEW
Occupancy sensors requirements.
2012 IECC Update Handout page 10 133
C405.2.2.3 Daylight zone control
REVISED
Each daylight control zone shall not exceed 2,500 square feet (232 m 2 ). Manual daylighting controls, automatic daylighting controls and multilevel lighting controls added.
2012 IECC Update Handout page 10 134
C405.2.3
Specific application controls
NEW
Specific application controls requirements.
2012 IECC Update Handout page 10 135
C405.5.2 Interior lighting power
REVISED
Building area and space-by-space methods to determine the total interior lighting power allowance.
2012 IECC Update Handout page 10 136
Tables C405.5.2(1, 2) Interior Lighting Power Allowances: Building Area Method and Space by space Method
REVISED
Tables list building areas and lighting power densities and formulas to determine interior lighting power allowances.
137 2012 IECC Update Handout page 10
Section C406 Additional Efficiency Package Options
NEW
Choose one: 1. Efficient HVAC performance 2. Efficient lighting 3. On-site renewable energy 2012 IECC Update Handout page 10 138
C406.2 Efficient HVAC performance
NEW
Equipment shall meet the minimum efficiency requirements of Tables 506.2(1) through (7).
2012 IECC Update Handout page 10 139
Tables C406.2(1, 2, 3) Equipment by Size and Minimum Efficiency
REVISED
Air conditioners, heat pumps and packaged terminal AC and heat pumps listed by size and efficiency.
140 2012 IECC Update Handout page 10
Table C406.2(4)
Warm Air Furnaces and Combination Warm Air Furnaces/Air-Conditioning Units, Warm Air Duct Furnaces and Unit Heaters, Efficiency Requirements
REVISED
Table for equipment by size and their minimum efficiencies for climate zones and test procedure required.
Handout page 10 2012 IECC Update 141
Table C406.2(4)
2012 IECC Update 142
Table C406.2(5) Boilers, Efficiency Requirements
REVISED
Table lists equipment by steam and hot water rather than if boiler is gas or oil fired.
2012 IECC Update Handout page 10 143
Table C406.2(6) Chillers — Efficiency Requirements
REVISED
Revised table data and footnotes.
2012 IECC Update Handout page 10 144
C406.3
Efficient lighting system
NEW
Whole building lighting power density requirements.
2012 IECC Update Handout page 10 145
Table C406.3
Reduced Interior Lighting Power
NEW
Table for reduced interior lighting power density (LPD) for building area types.
146 2012 IECC Update Handout page 10
Section C406.4
On-site Renewable Energy
NEW
Total minimum ratings of on-site renewable energy systems shall comply with one of the following: Provide not less than 1 .75 Btu’s (1850 W) or 0.50 watt per square foot (5.4 W/m 2 ) of conditioned floor area.
Provide not less than 3 percent of the energy used within the building for building mechanical and service water heating equipment and lighting. 2012 IECC Update Handout page 10 147
Section C408 System Commissioning
NEW
Verifies that the building has been built and is operating as designed.
C408.2 Mechanical systems commissioning and completion requirements.
C408.3 Lighting system functional testing.
2012 IECC Update Handout page 10 148
Section C408.2 Mechanical systems commissioning and completion requirements
NEW
Prior to passing the final mechanical inspection, the registered design professional shall provide evidence of mechanical systems commissioning and completion.
2012 IECC Update Handout page 10 149
Section C408.2.1 Commissioning plan
NEW
A commissioning plan shall be developed by a registered design professional or approved agency.
150 2012 IECC Update Handout page 10
Section C408.2.2
Systems adjusting and balancing
NEW
HVAC systems adjusting and balancing activities Air systems Hydronic systems 151 2012 IECC Update Handout page 10
Section C408.2.3 Functional performance testing
NEW
C408.2.3.1 Equipment.
C408.2.3.2 Controls.
C408.2.3.3 Economizers.
2012 IECC Update\ Handout page 10-11 152
Section C408.2.4 Preliminary commissioning
report NEW
Completed and certified by the registered design professional or approved agency.
153 2012 IECC Update Handout page 11
Section C408.2.5
Documentation requirements
NEW
Provide to building owner within 90 days of certificate of occupancy.
Drawings.
Manuals.
System balancing report.
Final commissioning report.
Handout page 11 2012 IECC Update 154
C408.3 Lighting system functional testing
NEW
Controls for automatic lighting systems.
2012 IECC Update Handout page 11 155
C408.3.1
Functional testing
NEW
Testing that will ensure that control hardware and software are calibrated, adjusted, programmed and in proper working condition.
2012 IECC Update Handout page 11 156
Chapter 4: Commercial Energy Efficiency
Low-sloped roofs shall have one or more options: a. Three-year aged solar reflectance of 0.55 and three-year aged thermal emittance of 0.75.
b. Initial solar reflectance of 0.7 and initial emittance of 0.75.
c. Three-year-aged solar reflectance index of 64.
d. Initial solar reflectance index of 82. Handout page 11 2012 IECC Update 157
Chapter 4: Commercial Energy Efficiency
8. What is the minimum skylight fenestration C402.3.2), the total daylight zone under skylights shall be area?
not less than half the floor area and shall provide a minimum skylight area to daylight zone under skylights of either: – Not less than 3 percent with a skylight VT of at least 0.4.
– Provide a minimum skylight effective aperture of at least 1 percent determined by the equation: Skylight effective aperture = 0.85 x skylight area x skylight VT x WT (area weighted average well factor).
Handout page 11 2012 IECC Update 158
Chapter 4: Commercial Energy Efficiency
three additional energy efficiency packages listed in this code. What are the three additional energy efficiency packages?
– C406.4 On-Site Renewable Energy (0.5 W/ft² or 3 percent).
Handout page 11 2012 IECC Update 159
Chapter 4: Commercial Energy Efficiency
systems commissioning and completion in this code.
provide evidence of mechanical systems commissioning and completion in accordance with the provisions of this section. Construction document notes shall clearly indicate provisions for commissioning and completion requirements, and are permitted to refer to specifications for further requirements. Copies of all documentation shall be given to the owner and made available to the code official upon request.
Handout page 12 2012 IECC Update 160
Chapter 4: Commercial Energy Efficiency
economizer? What is a functional test for approved plans and specifications such that operation, function control hardware and software?
include all modes and sequence of operation, including under full load, part load and following emergency conditions. Functional testing for control hardware and software are calibrated, adjusted, programmed and in proper working condition in accordance with the construction documents and manufacturer’s instructions.
Handout page 12 2012 IECC Update 161
2012 IECC Update 162
2012 IECC Update 163
2012 IECC Update 164
2012 IECC Update 165
2012 IECC Update 166
2012 IECC Update 167
2012 IECC Update 168
2012 IECC Update 169
2012 IECC Update 170
2012 IECC Update 171
2012 IECC Update 172
2012 IECC Update 173
Chapter 4
Residential Energy Efficiency
2012 IECC Update 174
R401.2 Compliance
REVISED
Added that projects comply with either mandatory and with either “prescriptive” or performance approach rather than section references in the code. For example: 401.3 Certificate (Mandatory) or 402.1 General (Prescriptive).
Handout page 17 2012 IECC Update 175
R401.3 Certificate
REVISED
Certificate shall be completed and posted by builder or registered design professional.
176 2012 IECC Update Handout page 17
Section R402 Building Thermal Envelope
REVISED
1. Insulation & fenestration values improved.
2. Eave baffles.
3. Steel frame wall values added.
4. Sunrooms have been reworked.
5. Air leakage controls are required. Handout page 17 2012 IECC Update 177
Table R402.1.1 Insulation & fenestration requirements by component
REVISED
Fenestration and skylight U-factors are improved.
Ceiling insulation R-values increase: R-30 to R-38 in Climate Zones 2 and 3, and R-38 to R-49 in Climate Zones 4 and 5.
Wall insulation R-values increase from R-13 to R-20 or R-13 + 5 in Climate Zones 3 and 4.
Note h clarified regarding continuous isolation.
Add SHGC 0.40 requirement for windows in Climate Zone 4.
Handout page 17 2012 IECC Update 178
Table R402.1.1 Insulation & fenestration requirements by component Maryland Climate Zones 4 and 5
Handout page 17 2012 IECC Update 179
Table R402.1.1 Insulation & fenestration requirements by component
Note h. First value is cavity insulation, second is continuous insulation or insulated siding, so “13+5” means R-13 cavity insulation plus R-5 continuous insulation or insulated siding. If structural sheathing covers 40 percent or less of the exterior, continuous insulation
R-value shall be permitted to be reduced by no more
than R-3 in the locations where structural sheathing is used – to maintain a consistent total sheathing thickness.
Handout page 17 2012 IECC Update 180
Table R402.1.1 Insulation & fenestration requirements by component
2012 IECC Update 181
Table R402.1.3 Equivalent U-Factors
REVISED
Data and footnotes changed.
2012 IECC Update Handout page 17 182
Table R402.1.3 Equivalent U-Factors
2012 IECC Update 183
R402.2 Specific insulation requirements
REVISED
In addition to the requirements of Section R402.1, insulation shall meet the specific requirements of Sections R402.2.1 through R402.2.12.
184 2012 IECC Update Handout page 17
R402.2.3 Eave baffle
NEW
A baffle is required adjacent to soffit and eave vents.
2012 IECC Update Handout page 17 185
R402.2.6 Steel-frame ceilings, walls and floors
REVISED
Changed references to Sections in this code.
2012 IECC Update Handout page 17 186
Table R402.2.6 Steel-Frame Ceiling, Wall and Floor Insulation R Values
REVISED
Data for steel framed wall 16 inches (406 mm) on center and steel framed wall 24 inches (610 mm) on center was added.
Handout page 17 2012 IECC Update 187
R402.2.12 Sunroom insulation
REVISED
Title and requirements with exceptions.
188 2012 IECC Update Handout page 17
R402.3 Fenestration
REVISED
Requirements of fenestration with Sections R402.3.1 through R402.3.6.
2012 IECC Update Handout page 17 189
R402.3.5 Sunroom U-factor
REVISED
Fenestration requirements with exception for sunrooms. U factor values changed from 2009 IECC.
190 2012 IECC Update Handout page 17
R402.4.1 Building thermal envelope
REVISED
Sealing methods and requirements changed from 2009 IECC.
2012 IECC Update Handout page 18 191
R402.4.1.1 Installation
NEW
The components of the building thermal envelope shall be installed in accordance with the manufacturer instructions.
Where required by the code official, an approved third party must inspect all components and verify code compliance.
Handout page 18 2012 IECC Update 192
R402.4.1.2 Testing
REVISED
At 50 Pa: 5 Air changes per hour (ACH) Climate Zones 1 and 2.
3 ACH in Climate Zones 3 through 8.
2012 IECC Update Handout page 18 193
R402.4.2 Fireplaces
REVISED
New wood-burning fireplaces shall have tight-fitting flue dampers and outdoor combustion air. Also, they must have gasketed doors as shown in Table R402.4.1.1.
Handout page 18 2012 IECC Update 194
R402.4.4 Recessed lighting
REVISED
No change other than listing testing after air leakage rate for recessed luminaires.
2012 IECC Update Handout page 18 195
R403 Systems
REVISED
1. Duct sealing options expanded.
2. Tested leakage reduced to 4cfm (113.3 L/min) per 100 square feet (9.29 m 2 ).
3. Piping insulation requirements have changed.
4. Ventilation fan efficiency.
5. Pools and inground spas.
Handout page 18 2012 IECC Update 196
R403.2.2 Sealing
REVISED
Eliminated building cavities used as ducts shall be sealed.
Testing requirements changed and exceptions were added.
197 2012 IECC Update Handout page 18
R403.2.2.1 Sealed air handler
NEW
Air handlers shall have a manufacturer’s designation for an air leakage of no more than 2 percent of the design airflow rate when tested.
2012 IECC Update Handout page 18 198
R403.2.3 Building cavities
REVISED
Building framing cavities shall not be used as ducts or plenums. This differs from 2009 IECC that stated building framing cavities shall not be used as supply ducts.
2012 IECC Update Handout page 18 199
R403.3.1
Protection of piping insulation
NEW
Piping insulation requirements Exposed to weather shall be protected from damage Adhesive tape shall not be permitted.
2012 IECC Update Handout page 18 200
R403.4 Service hot water systems
REVISED
Hot water systems shall be in accordance with Section R403.4.1, Circulating hot water systems (Mandatory), and Section R403.4.2, Hot water pipe insulation (Prescriptive).
Note, in the 2009 IECC the title of this section was Circulating hot water systems.
Handout page 18 2012 IECC Update 201
R403.4.1 Circulating hot water systems
REVISED
Eliminated insulating circulating service hot water piping with Group R-2.
2012 IECC Update Handout page 18 202
R403.4.2 Hot water pipe insulation
NEW
All hot water pipe, minimum R-3. Thermal resistance for piping listed as 1 through 9 in the code.
2012 IECC Update Handout page 18 203
Table R403.4.2
Maximum Run Length
NEW
Maximum run length for piping 3/8 inch (9.5 mm) to greater than 3/4 inch (19.1 mm) for all piping from the distribution manifold or the recirculation loop to a point of use.
2012 IECC Update Handout page 18 204
R403.5 Mechanical ventilation
REVISED
Ventilation must meet the International Residential Code or International Mechanical Code, or other means applicable.
Handout page 18 2012 IECC Update 205
R403.5.1 Whole-house mechanical ventilation system fan efficacy
NEW
Introduces “whole-house mechanical ventilation.” 2012 IECC Update Handout page 18 206
TABLE R403.5.1 MECHANICAL VENTILATION SYSTEM FAN EFFICACY FAN LOCATION Range hoods In-line fan Bathroom, utility room Bathroom, utility room 90 AIR FLOW RATE MINIMUM (CFM) Any Any 10 MINIMUM EFFICACY (CFM/WATT) 2.8 cfm/watt 2.8 cfm/watt 1.4 cfm/watt 2.8 cfm/watt AIR FLOW RATE MAXIMUM (CFM) Any Any < 90 Any
Handout page 18 2012 IECC Update 207
Section R403.6
Equipment sizing (Mandatory)
REVISED
Removes reference to IRC for duct-sealing and sizing of systems. Updated reference to heating and cooling equipment sizing in accordance with ACCA Manual S-10, Residential Equipment Selection.
ACCA Manual J-11, Residential Load Calculations, 8 th edition.
2012 IECC Update 208 Handout page 18
R403.9 Pools and in ground permanently installed spas
REVISED
Heater, time switch and cover requirements for pools and in ground, permanently installed spas.
2012 IECC Update Handout page 18 209
R404 Electrical Power and Lighting Systems
REVISED
75 percent of the total lamps shall be high efficacy lamps.
Fuel Gas Lighting 210 2012 IECC Update Handout page 18
R404.1.1 Lighting equipment
NEW
Fuel gas lighting systems shall not have continuously burning pilot lights.
2012 IECC Update Handout page 19 211
R405 Stimulated Performance Alternative
REVISED
Process Is virtually unchanged performance is improved.
2012 IECC Update Handout page 19 212
Table R405.5.2(1) Specifications for the Standard Reference and Proposed Designs
REVISED
Glazing, air exchange rate, heating systems and cooling systems standard reference design and proposed design have been revised. For the thermal distribution systems the standard reference design was eliminated and the proposed design was revised.
Footnotes revised. Footnote c added that where required by the code official testing shall be conducted by an approved party.
Handout page 19 2012 IECC Update 213
Table R405.5.2(1) Specifications for the Standard Reference and Proposed Designs
REVISED
Footnote d had the leakage area and reference to ASHRAE 119 eliminated. Instead hourly calculations as specified in the ASHRAE Handbook of Fundamentals or equivalent shall be used to determine the energy loads resulting from infiltration.
Also, footnote h was revised as follows: For a proposed design without a proposed cooling system, a heating system with a prevailing federal minimum efficiency shall be assumed for both the standard reference design and proposed design.
Handout page 19 2012 IECC Update 214
R405.6.1 Minimum capabilities
REVISED
Item 2 —The calculation of the whole building sizing for the heating and cooling equipment in the standard reference design residence will be in accordance with Section R403.6.
2012 IECC Update Handout page 19 215
Chapter 4: Residential Energy Efficiency
12.What are
R-values for Climate Zones 2 and 3 for the ceiling?
R-30 to R-38.
2012 IECC Update Handout page 22 216
Chapter 4: Residential Energy Efficiency
affects residential and commercial opening directly into an adjacent conditioned space. For buildings?
unconditioned spaces shall be weatherstripped and insulated to a level equivalent to the insulation on the surrounding surfaces (see Section R402.2.4). All sunrooms enclosing conditioned space shall meet the fenestration requirements of this code unless they meet exceptions (see Section R402.3.5). For commercial buildings the floor (see Section C402.2.5), duct and plenum insulation and sealing (see Section C403.2.7) are affected if the space is not conditioned.
Handout page 22 2012 IECC Update 217
Chapter 4: Residential Energy Efficiency
to maintain usage temperatures using pipe heating cable, the system pump or heat trace cable that has automatic or manual switches or controls that can be set to optimize system operation or turn off the system during periods of reduced demand .
Handout page 22 2012 IECC Update 218
Chapter 4: Residential Energy Efficiency
15.What is the SHGC for windows in Climate Zone 4?
40 2012 IECC Update Handout page 22 219
Chapter 4: Residential Energy Efficiency
16.Explain Section R405.6.1, Minimum Calculation procedures used to comply with this section shall be software tools capable of calculating the annual energy consumption of all building elements that differ between the standard reference design and the proposed design .
Handout page 22 2012 IECC Update 220
2006 IECC ® Fundamentals 225
Question and Answer Segment
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(1-877-209-1336)
with your questions
229
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