Why Furnace Size Matters

Larrylowther01 Oct, 2026Home & Garden

Furnace size matters because heating capacity needs to match the home’s heating load. An undersized furnace may struggle during colder weather, while an oversized furnace can cycle too quickly and create uneven comfort. Proper sizing considers insulation, windows, air leakage, construction, and local winter conditions rather than relying on square footage alone.