Permits & code · Learn
Permits, TSSA & ESA compliance for HVAC in the GTA & Durham
HVAC work in Ontario is regulated on three axes at once: municipal building permits, TSSA fuels safety, and ESA electrical safety. Understanding how each applies protects you from bad installs, invalidated warranties, and problems at resale.
Articles in this cluster
3 guides for permits & code in the GTA
Do you need a permit for a furnace replacement in Ontario?
When a furnace replacement in the GTA requires a municipal mechanical permit — the general rule, common exceptions, and how to verify with your local building department.
Read guideLearnTSSA gas work — what homeowners need to know
How Ontario's Technical Standards and Safety Authority (TSSA) regulates gas HVAC work, what certification your technician needs, and how to verify.
Read guideLearnESA permits for HVAC electrical work in Ontario
When HVAC installs require an ESA electrical permit — heat pumps, mini-splits, electric water heaters, and panel work in the GTA & Durham Region.
Read guideTalk to Metroheat