Tag: csa f280

HVAC technician measuring a room to size a furnace for a Durham Region home

What Size Furnace Do I Need? A Furnace Size Guide for Ontario Homes

November 2, 2026

Aire One East Heating & Cooling What Size Furnace Do I Need?A BTU Guide for Ontario Homes Why square footage alone gets it wrong, how a heat loss calculation works, and what happens when a furnace is too big or too small Heat Loss CalculationRight-Sized …

1910 Dundas St E #117
Whitby, ON-L1N 2L6

info@aireonedurham.ca

905-576-7600

Serving Whitby, Oshawa, Ajax, Pickering, Courtice, Bowmanville, Port Perry and Uxbridge — L1M, L1N, L1P, L1R, L1G, L1H, L1J, L1K, L1L, L1S, L1T, L1Z, L1V, L1W, L1X, L1Y, L1C, L1E, L9L, L9P, L0C — and beyond.