Reference boundary

Ontario residential source-navigation only. It does not publish heat-pump demand factors, supplemental-heat calculations, service sizing outputs, or design acceptance.

Reference table

Point to official Ontario source pages relevant to heat-pump and supplemental electric heat load review.

Reference basis uses ESA Bulletin 8-3-16, ESA Ontario Electrical Safety Code, and ESA bulletin-index navigation.
Source areaCurrent sourceReview useBoundary
ESA Bulletin 8-3-16Maximum circuit loading and demand factorsUse this heat-pump load source before reviewing heat-pump or supplemental electric heat load context.source-navigation only; no heat-pump demand factor, supplemental-heat calculation, service sizing output, or interlock answer is reproduced
ESA OESCOntario Electrical Safety Code pageUse this page to confirm the current Ontario code cycle before reading heating-load sources.source-navigation only; no heat-pump demand factor, Ontario rule text, amendment, or compliance answer is reproduced
ESA bulletins indexElectrical Safety Authority bulletinsUse the index to locate current dwelling-load bulletins before heating-load review.source-navigation only; no heat-pump demand factor, load example, service decision, or inspection answer is reproduced
Use notes
  • Use this table only for source-navigation and current source-area review.
  • Confirm the current source document, product marking, utility page, or authority guidance before any design or field decision.