Canadian research into residential ventilation and combustion venting revealed that the installed performance of exhaust equipment, ducting passages, and site-built chimneys was largely unknown. It became necessary to establish actual characteristics in order to be better able to predict the safety and effectiveness of various ventilation measures. For this reason, Canada Mortgage and Housing Corporation (CMHC), the federal agency responsible for housing policy, had a research device designed and fabricated.
Research and test results presenting measurements of air infiltration rates in residences are reviewed. In particular, comparison of electric and combustion heating shows (on average) infiltration rates to be 0.1 to 0.25 higher for residences with combustion heating.
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