What Size Furnace Do I Need for My Calgary Home?

Buying a furnace isn’t like buying a microwave—you can’t just pick one based on a good sale. If it’s too small, you’ll freeze. Too big? You’ll overpay and waste energy.

Here’s how to get it just right (and how we help).

Key Factors That Affect Furnace Size:

1. Square Footage
   Most Calgary homes need 30–60 BTUs per square foot. A 2,000 sq ft home needs around 60,000–120,000 BTUs—but that’s just a starting point.

2. Insulation Quality
   Newer, better-insulated homes may need a smaller furnace than older drafty ones.

3. Windows & Exposure
   Lots of windows? West-facing? These things affect how your home retains heat.

4. Ceiling Height
   More air = more heat needed. Vaulted ceilings make a difference.

5. Basement or No Basement?
   Finished basements often require separate considerations.

Why You Shouldn’t DIY Furnace Sizing

Guessing leads to big mistakes—and big energy bills. We use professional heat load calculations based on your unique space and lifestyle.

Thinking about a new furnace? Get in touch and we’ll help you choose the perfect size for your Calgary home—no guesswork, no overselling.