English

The orientation, size, and nature of vents in screened exterior wall systems are important to wall performance because these characteristics affect venting, ventilation and pressure moderation. The ventilation of screened wall systems has received very little attention in Canadian building research. With funding from CMHC 's External Research Program, the B uilding Enginee ring Group at the Uni versity of Waterloo undertook an experimental and theoretical study of vents and venting in screened walls.

This study examines a broad range of implications associated with the adoption of the National Energy Code for Housing (NECH) in Ontario. It is based on Public Review Draft 1.0 of the NECH. This study compares the OBC and the NECH providing commentary on key differences between the documents. It examines the energy, environmental and industry implications of adopting the NECH in Ontario. It reviews the cost implications of adoption from a capital, energy and life cycle viewpoint while examining environmental costs by monetizing space heating equipment emissions.

The use of energy for operating ventilation systems in underground car parks in Hong Kong is considered. A site survey has been carried out in 22 underground car parks. The physical size, configurations, and electrical rating of ventilation fans were the main mailers of interest. The indoor thermal environments, carbon monoxide concentrations, and operation of ventilation systems were examined. Mathematica/ expressions are developed and the predicted results examined for another 54 underground car parks.