Transcript 2005 - Weatherization

2005
ASHRAE 62 – 1989
BTL
Building Tightness Limit
Based on LBL Correction factor
Gives agencies a minimum target CFM 50
Using the Zip Test Pro TI-86
BTLa
Building Tightness limits and ventilation
requirements based on
ASHRA 62,119 & 136
Recommends Mechanical Continuous
Ventilation
New fan standards
• Rated for Continuous use
• Sone level 1.0 or less certified by the
home ventilation institute.
• Energy efficient 19 watt or less
Problem
• Contactors had a hard time finding the
fans.
• Clients complained of fans running
continuously.
• Agencies finding electricians to install
fans.
Solutions
• Changed standards to allow intermittent
fans instead of continuous.
• If BTLa called to add 50cfm fan.
• House had a existing fan in the bathroom,
no other fan was needed.
Installation rate and Cost
• 30% of homes receive a new fan
• Cost ranges from $500.00 to $1000.00 per
fan installed.
ASHRARE 62.2- 2010
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•
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Measure air flow on all existing fans.
Bathrooms must have 50cfm fans.
Kitchens must have 100cfm fans.
Or use a alternative compliance for
existing homes. ( Over size your
continuous fans to account for bathrooms
and kitchens)
ASHRARE 62.2- 2010
• Run time instead of continuous.
• All fans must provide required flow at .25
w. g.
• Installation rate will increase to 90% of the
home receiving fans.
• Depressurization tightness limits. (DTL)
OSHA Training
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OSHA Construction Industry regulations
Local agency providing training.
Local agency adjust training to WX
Local Community Colleges provide
training.
• We are having problems with OSHA rules
contridicting Lead safe Practices such as
plastic outside on the ground when raining
or snowing. It gets slick & unsafe.