Supplement 4: How to Install

How to Install Ducted Range Hood Systems

January 2018












Finally, test the airflow rate of the installed hood. Many installed hoods do not perform nearly as well as rated or designed (Singer et al. 2010; Delp & Singer 2012). Building performance contractors and energy auditors can test using devices such as flow hoods or blower doors. If you can’t test the flow, feel the airflows at the hood and at the roof or wall vent at all fan speeds, before the vent cap is put on. Make sure the airflow is noticeable, stronger at higher fan speeds, and moving away from house. (See also pressure testing recommendations for homes in SUPPLEMENT: Caveats and Cautions.)

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