The Ontario Builder's Guide to HVAC & Building Permits
Plain-English guides for Ontario homeowners, self-builders, and contractors navigating CSA F280 heat loss calculations, cold-climate heat pumps, building permits, and HVAC design. Written from 45 years of building in Simcoe County and Georgian Bay — not from a generic construction blog. Start with our CSA F280 service page if you just need the report, or read on if you want to understand what's behind it.
Every guide is written specifically for Ontario's climate, building code, and permit process. No California construction advice, no generic tips. If it doesn't apply in Barrie or Muskoka, it's not here.
After 45 years of building homes in Ontario, I've seen every reason a heat loss report gets bounced back. Most of them have nothing to do with the math. The calculation itself is usually fine — what got you rejected is a missing stamp, a wrong design temperature, a form that didn't get uploaded, or a portal requirement your designer didn't know about. Here are the seven most common causes, in order of how often I see them.
Read the full guideThe brochure says your heat pump works at -30°C. The fine print tells a different story. After 45 years of building homes in Muskoka and Georgian Bay, here's what every homeowner needs to understand before signing an equipment contract — rated capacity vs actual output at your design temperature, what -28°C does to a Muskoka system, how to size backup heat, and why ICF homes need smaller heat pumps than a rule of thumb suggests.
Read the full guideWe publish new guides as we finish them — always based on real questions from Ontario homeowners and builders, not SEO templates.
All our guides cover Ontario specifically — Ontario Building Code, Ontario design temperatures, Ontario municipalities. Use these topics to find what's relevant to your project.
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Read the guides, then upload your plans. We'll confirm your municipality's requirements and deliver a BCIN-stamped report in 48 hours.