OBC 9.33
Building Code Sections - Consumer Protection pillar
Also known as: Ontario Building Code 9.33
Ontario Building Code Section 9.33: Heating and Air-conditioning. Sets equipment sizing, install standards, and venting requirements for HVAC.
Section 9.33 of the Ontario Building Code governs residential heating and air-conditioning equipment. Requires Manual J load calculations for equipment sizing, references CSA B149.1 for gas appliance installation, and sets venting standards for atmospheric and condensing equipment. Permit-required for any new install or replacement of HVAC equipment in most Ontario municipalities. The companion Section 9.36 covers building-envelope energy efficiency.
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