San Francisco · Daly City · South San Francisco · Pacifica
Gas furnace replacement from $3,390, installed
Central gas furnace from $3,390 installed (ACiQ 80% AFUE, 40,000 BTU). Wall furnace from $2,090.
- Fix first. Replace within 6 months and what you paid for the visit and repair comes off your new furnace, up to $500.
- Repair visit from $49. If we can’t fix it, you pay nothing.
- 3-year workmanship warranty on every new furnace.
Repair visit price depends on your zone (see the zone map). Prices are for a standard replacement and are confirmed at a free site visit. Asbestos, duct and gas line work, and vent liners are quoted separately if needed.
Pick your furnace
- Base: ACiQ. Our value line.
- Premium: Bryant. Stocked by our local supplier.
- Both come in 80% or 96% efficiency, one-stage or two-stage, 40,000 to 120,000 BTU.
- Wall furnace? We replace it with a Williams wall furnace.
Staying on gas? Pick your furnace online and see your price in a minute.
Done right on every furnace
- Return air cleaned before the new furnace goes in
- New filter box, sediment trap and fused disconnect
- New vent pipe
- Mastic on every duct joint and plenum, new insulation on our connections
- Old furnace removed, then start-up and testing
Deposit when you approve the estimate: 10%, never more than $1,000.
Who does the work
Mihas HVAC is a small, owner-operated HVAC contractor based in South San Francisco. The person who quotes your job installs it.
CA Lic. C-20 #1149214. Insured: general liability insurance up to $1,000,000 coverage.
We serve San Francisco, Daly City, South San Francisco and Pacifica.
What customers say
Quick answers
Can I still install a gas furnace in the Bay Area?
Yes. Under Bay Area Air District rules, gas furnaces made after January 1, 2029 must be zero-NOx to be sold or installed here. Existing furnaces don’t have to be replaced, and a standard gas furnace can be installed today. Rules can change; we follow the current ones.
80% or 96% efficiency?
An 80% furnace costs less and usually reuses your metal flue. A 96% furnace uses less gas but needs plastic vent pipes and a condensate drain. We check the venting at the visit.
One-stage or two-stage?
One-stage is either on or off. Two-stage runs on low most of the time, so it is quieter and keeps temperatures more even. It costs more.
Can I repair instead of replace?
Yes, and we try that first. If we can’t fix your furnace, you pay nothing for the visit.
Do you pull a permit?
Yes, on request. It is quoted separately, and we meet the inspector.