Heating & cooling
The $8,000 question,
answered with data.
Tell us about the system you have — or the home you're sizing for.
I have a system — fix or replace?
The 50% rule, done honestly: your repair quote vs. the going equipment price for your region (installation is extra).
tons
Don't know the tonnage? It's on the outdoor unit's data plate — or just leave 3.
Sizing a system for my home
Square footage + region → the size you need, with three honest options.
Planning estimate — a real install needs a Manual J load calc.
Got an appliance question too?
Same honest treatment for kitchen & laundry — model number or symptom.
Replacement band is EQUIPMENT pricing from the live catalog for your region & size — installed quotes run meaningfully higher; enter one for the true comparison. The 50% rule and efficiency payback are planning guides, not quotes.