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2005

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.

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2005

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  1. 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

  2. BTLa Building Tightness limits and ventilation requirements based on ASHRA 62,119 & 136 Recommends Mechanical Continuous Ventilation

  3. 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

  4. Problem • Contactors had a hard time finding the fans. • Clients complained of fans running continuously. • Agencies finding electricians to install fans.

  5. 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.

  6. Installation rate and Cost • 30% of homes receive a new fan • Cost ranges from $500.00 to $1000.00 per fan installed.

  7. ASHRARE 62.2- 2010 • 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)

  8. 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)

  9. OSHA Training • 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.

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