Code Library › Volume 1 › Section 9.32 — Ventilation
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.32.3.12.Heat Recovery Ventilators (See Note A-9.32.3.12.)

(1) This Article shall apply to heat recovery ventilators installed to provide one or more of the fans required by this Subsection. (2) Two or more heat recovery ventilators shall not be connected in parallel airflow to a common air supply duct, unless specifically permitted by the manufacturer. (3) Two or more heat recovery ventilators shall not be connected in parallel airflow to a common downstream exhaust duct. (4) All start-up procedures recommended by the manufacturer, including air balancing and airflow determination, shall be followed. (5) A means for the free flow of condensate shall be provided in accordance with the manufacturer's recommendations or, in their absence, a condensate drain of at least 1/2 inch nominal pipe size pitched in the direction of flow and complete with a trap or condensate pump of sufficient capacity shall be installed and connected to the dwelling unit's drain, waste and vent system. (6) The heat recovery ventilator and all condensate lines shall be installed in a space where the ambient temperature will not adversely affect the operation of the system.
← Previous9.32.3.11. Ducts (See Note A-9.32.3.11.)Next →9.32.3.13. Outdoor Intake and Exhaust Openings

Common questions about this part of the code

How is the principal ventilation fan sized by number of bedrooms in Ontario?What are the exhaust fan requirements for bathrooms and kitchens in Ontario?What are the minimum openable window areas for natural ventilation in Ontario?

Understand this provision in seconds

BUILDAiD Assist explains any article of the building code in plain English — with exact citations, exceptions and related requirements.

Try BUILDAiD Beta

Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.