Heating & Cooling
H&C 4 AIA, ASHI, BPI, RESNET
House Depressurization & Combustion
Safety
Why has house depressurization and back draft testing become a major part of performance contracting and weatherization
standards? Homes are being built or renovated with less air leakage. More and larger exhaust devices are being installed in many homes. Find out how
ventilation/energy codes and standards address the need for make-up air. What testing procedures are used to test for potential
problems both before and after energy retrofitting houses? What are some potential solutions where problems occur? Do holes in the wall really work?
By attending this session, participants will
1. Review combustion venting and testing procedures
2. Find out how different codes and standards attempt to deal with the depressurization issue and make-up air
requirements
3. Learn about potential solutions to make-up air requirements in new and existing homes
Keywords: backdrafting, building envelope tightness, carbon
monoxide, codes, combustion venting, combustion zone, diagnostics, health and safety, heating and cooling systems, HVAC, liability, depressurization,
spillage, testing
Martha Benewicz, WI Division of Energy,
New
John Hockman, JL Hockman
Consulting, Inc.,