1985年的《加拿大国家建筑规范》规定，新房屋的排气装置容量必须至少为每小时0.5次换气。然而，现场测试表明，安装的排气设备的性能变化很大，家用排气扇的使用是不可预测的。建筑商如何满足规范要求并保持可接受的气流和声级？政府的一项研究项目旨在为建筑商提供家用排气扇的选择和安装的明确指南。本文将仅限于厨房抽油烟机的结果。承包商调查了现有文献和设备，以确定家庭使用模式、风扇和排气系统部件的性能，以及新产品和系统的潜力。 对加拿大20所房屋的实地检查显示了风扇的安装方式和安装者。现场测试显示这些风机偏离额定流量水平。同时进行的实验室测试有助于解释系统未能达到额定容量的原因。最终产品是排气扇的制造商指南。最简洁的建议是避免使用最便宜的产品，并按照制造商的规格安装。引文:研讨会，ASHRAE交易，第95卷，pt。1989年，芝加哥

The 1985 National Building Code of Canada specifies that new houses must have an installed exhaust capacity of at least 0.5 air changes per hour. However, field testing has shown that the performance of installed exhaust equipment is highly variable, and that household usage of exhaust fans is unpredictable. How are builders to meet the code specification and maintain acceptable airflow and sound levels?A government research project was designed to give builders a clear guide to the selection and installation of household exhaust fans. This paper will be restricted to the results for kitchen range hoods. The contractor investigated existing literature and equipmento establish household usage patterns, the performance of fans and exhaust system components, and the potential for new products and systems. Field inspections on 20 houses across Canada showed how the fans were installed and by whom. Field testing revealed the deviation of these fans from rated flow levels. Simultaneous laboratory testing helped to explain why the systems failed to meet rated capacity.The end product is a builder’s guide to exhaust fans. The most succinct recommendations are to avoid using the cheapest products and to install to the manufacturer’s specifications.