Transcript Slide 1

proposed
addendum to
90.1-2010 and
what it means
for YOU
Leonard Sciarra, AIA, LEED BD+C
Gensler
90.1-2010
• 3 year cycle
• 100 + addenda
– bb , prescriptive tables
– bn , orientation
– al, required toplighting
– bf, continuous air barrier
– f, cool roofs
– dd, daylighting interface
– q vestibules (no changes for this climate)
Process
LCC Theory
50000
First Costs
Energy Costs
45000
LCC
40000
35000
LCC ($)
30000
25000
20000
15000
10000
5000
0
0
5
10
15
20
25
30
35
Energy Conservation Measure
40
45
50
Process
• Criteria based on typical
construction types
Flash back to
2008
2
bb
spacers
2
IGD
fills
200+ ‘lites’
20
400+
‘windows’
IG units
Metal/
non metal
frame
5
Frames
bb
• Adjust as required
– Does this make sense
– Adjust for VT*
SHGC
0.25
0.25
0.25
0.39
0.39
0.39
0.49
nr
90.1-2004 (30%)
0.25
0.25
0.25
0.40
0.40
0.40
nr
nr
IECC-2006
0.25
0.25
0.25
0.40
0.40
0.40
0.45
0.45
current (90.1-2007)
0.25
0.25
0.25
0.26
0.26
0.35
0.40
0.40
addendum "bb"
0.25
0.25
0.25
0.35
0.35
0.40
0.45
0.45
189.1 proposal
0.25
0.25
0.25
0.40
0.40
0.40
0.45
0.45
NBI proposal
0.27
0.26
0.26
0.30
0.30
0.18
0.18
0.18
ron nickson
0.40
0.40
0.40
0.45
0.45
zaremba
0.27
0.27
0.30
0.40
nr
nr
nr
nr
0.25
0.25
0.25
0.30
0.30
0.35
0.40
0.40
no requirement
energy star
public review consensus
current
VT/SHGC > 1.5 for 0-20% window area
VT/SHGC
1.3
for all 0%30%
=LSG 1.5
addendum "bb"
VT/SHGC > 1.2 for 21-40% window area
EA requirement for schools, offices
no requirement
189.1 proposal
NBI proposal
bb
VT/SHGC ratio
1.1
LSG
1.25
bb
SHGC – solar heat gain coefficient
.25 (cz1)  .45 (cz8)
.25 (cz1)  .40 (cz8)
bb
• U-factor, fenestration
•
If greater than 30% WWR, then performance path for residential and perhaps
nonresidential
Metal framing, fixed
1.22
1.22
0.57
0.57
0.57
0.57
0.57
0.46
90.1-2004 (30%)
1.20
0.75
0.60
0.50
0.45
0.45
0.45
0.45
IECC-2006
1.20
0.70
0.60
0.50
0.45
0.45
0.40
0.40
current
0.73
0.50
0.46
0.38
0.38
0.36
0.26
0.26
addendum "bb"
1.20
0.70
0.50
0.40
0.35
0.35
0.30
0.30
189.1 proposal
0.57
0.57
0.50
0.42
0.42
0.42
0.40
0.40
NBI proposal
0.73
0.53
0.5
0.42
0.42
0.4
0.36
0.29
no argon
0.73
0.5
0.46
0.38
0.38
0.36
0.29
0.29
consensus
bb
Fenestration U-factor
1.20 (cz1)  .35 (cz8)
.51 (cz1)  .25 (cz8)
bb
• U-factor, walls
Value in the table is a simple listing of the R-values for insulation, and does not distinguish between cavity insulation and continuous insulation.
1
OPAQUE
2
3
4
5
6
7
8
(R-value total of cavity insulation + continuous insulation)
Roof
Above deck
Metal building
Attic & other
20
25
25
30
30
30
35
35
10+19
10+19
10+19
19+11
19+11
25+11
30+11
25+11+11
38
38
38
49
49
49
60
60
0
5.7
7.6
9.5
11.4
15
17
19
9.8
9.8
13
15.8
19
19
22.1
25
13+7.5
13+7.5
13+7.5
13+10
13+12.5
13+15
13+18.8
13+18.8
13
13+3.8
13+3.8
13+7.5
13+10
13+12.5
13+15
13+18.8
Walls, Above Grade
Mass
Metal building
Steel framed
Wood framed
bb
Roofs
R-15 (cz1)  R-20 (cz8)
R-20 (cz1)  R-35 (cz8)
walls
R-13 (cz1)  R-13+7.5ci (cz8)
R-13+7.5ci (cz1)  R-13+18.8ci (cz8)
cx
Allows buildings to have up to 40%
• Distribute glass to daylight 50% of floor
area
• Install daylight dimming
Addenda al – Skylights large spaces
• 5.5.4.2.2 Maximum Skylight Fenestration Area. The total skylight area shall
be less than 5% of the gross roof area.
• 5.5.4.2.3 Minimum Skylight Fenestration Area. In enclosed spaces that are:
– i. greater than 10,000ft2, and
– ii. directly under a roof with ceiling heights greater than 15 ft, and
– iii. one of the following space types: office, lobby, atrium, concourse, corridor, storage,
gymnasium/exercise center, convention center, automotive service, manufacturing, nonrefrigerated warehouse, retail, distribution/sorting area, transportation, or workshop.
• The total skylight area shall be either;
– a. a minimum of 3% of the roof area of that enclosed space with a skylight VLT at least 0.40,
or
– b. such that the daylight area under skylights will be a minimum of half the floor area and
provide a minimum skylight effective aperture of at least 1%.
• These skylights shall have a glazing material or diffuser with a measured haze
value greater than 90% when tested according to ASTM D1003. General
lighting in the daylight area shall be controlled as described in Section 9.4.1.4.
Addenda al – Skylights
• EXCEPTIONS to 5.5.4.2.3
1. Enclosed spaces in climate zones 6 through 8,
2. Enclosed spaces with designed general lighting power densities
less than 0.5 W/ft2
3. Areas where it is documented that existing adjacent structures
or natural objects block direct beam sunlight on at least half of
the roof over the enclosed area for more than 1,500 daytime
hours per year between 8 am and 4 pm.
4. Enclosed spaces where the daylight area under rooftop monitors
is greater than 50% of the enclosed space floor area.
5. Enclosed spaces where it is documented that 90% of the skylight
area is shaded on June 21in the Northern Hemisphere
(December 21 in the Southern Hemisphere) at noon by
permanent architectural features of the building.
Addenda bn - Orient bldg’s with
more glass on south
•
5.5.4.5. Fenestration Orientation. The vertical fenestration
area shall meet the following requirement:
Area South ≥ Area West and Area South ≥ Area East,
Addenda bn - Orient bldgs
with more glass on south
•
Exceptions to 5.5.4.5:
(a) Vertical fenestration that complies with the exception to 5.5.4.4.1 (c).
(Storefronts)
(b) Buildings that have an existing building or existing permanent
infrastructure within 20 ft (6 m) to the south (north in the southern
hemisphere) which is at least half as tall as the proposed building.
(Urban infill buildings)
(c) Buildings with shade on 75% of the west and east oriented vertical
fenestration areas façade from permanent projections, existing
buildings, existing permanent infrastructure or topography at 9 AM and
3 PM on the summer solstice (June 21 in the northern hemisphere).
(Shaded buildings)
(d) Alterations and additions with no increase in vertical fenestration area.
Addenda f – Cool roofs
•
5.5.3.1.2 Roof Solar Reflectance and Thermal Emittance.
Roofs in climate zones 1 through 3 shall have one of the following:
a. a minimum three-year-aged solar reflectance of 0.55 when tested in
accordance with ASTM C1549 or ASTM E1918, and in addition, a minimum
three-year-aged thermal emittance of 0.75 when tested in accordance with
ASTM C1371 or ASTM E408.
b. a minimum three-year-aged Solar Reflectance Index of 64 when determined in
accordance with the Solar Reflectance Index method in ASTM E1980 using a
convection coefficient of 2.1 BTU/h-ft2 (12 W/m2.K),or.
c. increased roof insulation levels that meet the following:
Roofs
Insulation Entirely Above Deck
Nonresidential Residential
U-0.030/R-33
U-0.029/R-34
Addenda f – Cool roofs
•
Exceptions to 5.5. 3.1.2:
a. Ballasted roofs with a minimum stone ballast of 17 lbs/ft2 (74 kg/m2) or 23 lbs/ft2 pavers (117 kg/m2).
b. Vegetated Roofs Systems that are either extensively and/or intensively vegetated, containing a
minimum thickness of 32.5 inches (76 63.5 mm) of growing medium and covering a minimum of 75%
of the roof area with durable plantings.
c. Roofs, where a minimum of 75% of the roof area:
i. Is shaded during the peak sun angle on June 21st by permanent components or features of the
building, or
ii. Is covered by off-set photovoltaic arrays, building-integrated photovoltaic arrays, or solar air or
water collectors, or
iii. Is permitted to be interpolated using a combination of parts i and ii above.
d. Metal building roofs in climate zone 3. Steep sloped roofs
e. roofs over ventilated attics or roofs over semi-heated spaces or roofs over conditioned spaces that are
not cooled spaces. Low sloped metal building roofs in climate zones 2 and 3.
f. Asphaltic membranes in climate zone 3. Roofs over ventilated attics or roofs over semi-heated spaces or
roofs over conditioned spaces that are not cooled spaces.
g. Asphaltic membranes in climate zones 2 and 3.
Addendum bf – Continuous air barrier
• Using individual materials that have an air permeability
≤ 0.004 cfm/ft2
• Using assemblies of materials and components that
have an average air leakage ≤ 0.04 cfm/ft2
• Testing the completed building and demonstrating that
the air leakage rate of the building envelope ≤ 0.4
cfm/ft2
Addenda ab – Lighting controls when
daylit
•
9.4.1.3 Automatic Daylighting Controls for Primary Sidelighted Areas. When the
combined primary sidelighted area in an enclosed space exceeds 1,000 ft2, the
lamps for general lighting in the primary sidelighted area shall be separately
controlled by at least one multi-level photocontrol (including continuous dimming
devices) having the following characteristics:
(a) the light sensor for the photocontrol shall be remote from where calibration
adjustments are made;
(b) the calibration adjustments shall be readily accessible; and
(c) the multi-level photocontrol shall reduce electric lighting in response to
available daylight with at least one control step that is between 50% and 70%
of design lighting power and another control step that is no greater than 35%
(including off) of design power.
Addenda ab –Lighting controls when
daylit
•
Exceptions to 9.4.1.3
(a) Primary sidelighted areas where the top of the existing adjacent structures are
twice as high above the windows as their distance away from the windows.
(b) Daylight areas where the sidelighting effective aperture is less than 0.1 (10%).
(c) Retail spaces
Terms to know
•
•
•
•
•
Primary sidelite area
Secondary sidelite area
Toplighting
Daylite area (under skylights, sidelite)
Effective Aperture
Summary
– bb , prescriptive tables
– bn , orientation
– al, required toplighting
– bf, continuous air barrier
– f, cool roofs
– dd, daylighting interface
– q vestibules (no changes for this climate)
Thank you
?