Ballpark your system size
A deliberately wide sanity-check range — its whole job is to catch bids sized by guesswork. The precise answer is a Manual J load calculation, which our free estimates include.
Ballpark your system size
When was the house built?
Heated square footage
Ballpark range
35,000–51,000 BTU/hr
≈ 3–4.5 tons of capacity
This is a sanity-check range, not a spec. The real number comes from a Manual J load calculation on your actual house — windows, orientation, air-tightness, ducts. Use this only to notice when a bid is wildly off or was quoted without measuring.
- A bid a full ton (12,000 BTU/hr) or more outside this range deserves the "how did you size this?" question.
- Bigger is not safer: oversized systems short-cycle, leave the air clammy, and wear out fast.
- Insulation upgrades shrink the system a house needs — replacements are often smaller than the old unit.
Educational bands reflect broad Pacific Northwest residential heating loads by construction era; your home will differ. Free estimates include a real load calculation — (206) 243-7700.
Ready for comfort you can count on?
Whether it's a furnace that quit on a cold morning or a whole new system, the Glendale team is ready. Honest pricing, expert work, and 87+ years behind every visit.
Hours & Emergency
- Mon–Sat: 8:00 AM – 7:00 PM
- Sun: Emergency On-Call Only
- Emergency line: (206) 243-7700