San Francisco · Daly City · South San Francisco · Pacifica
Gas furnace repair and replacement
Keep your gas heat. If your furnace can be fixed, we fix it first. If it’s time for a new one, pick your furnace online, and you get a written price before any work starts.
Repair it
Furnace not working? A repair visit is $49 in South San Francisco and $99 in San Francisco, Daly City and Pacifica. If we can’t fix it, you pay nothing.
Replace it
Time for a new furnace? Choose Base (ACiQ) or Premium (Bryant), 80% or 96% efficiency, one-stage or two-stage.
Price my new furnace- Fix first. Replace within 6 months and what you paid for the visit and repair comes off your new furnace, up to $500.
- Written price before work starts. 10% deposit when you approve, never more than $1,000.
- Premium installs fast. Bryant furnaces go in 1–2 days after you approve.
- The owner does the work. The person who quotes your job installs it.
Licensed C-20 HVAC contractor (CSLB #1149214), based in South San Francisco. Call or text (415) 484-8437, or .
Fix first. Replace only when it makes sense.
A furnace that can be repaired doesn’t need to be replaced. Our Fix-First Credit means a repair is never money wasted.
- Book a repair visit$49 in South San Francisco, $99 in San Francisco, Daly City and Pacifica. We find the problem and explain your options.
- We repair itIf we can’t fix it, you pay nothing, not even the visit. Repairs come with a 1-year warranty.
- Credit toward a new furnaceReplace your furnace with us within 6 months and what you paid for the visit and repair comes off the new furnace, up to $500.
Furnace not heating?
Leave your name and number and we’ll call you to set up a visit. Weekend visits are available on request at twice the visit fee.
Price your new furnace
Pick your furnace and add your contact details. If we have an online price for your setup, you see it right away; if not, we call you to book a free site visit and give you a written estimate the same day.
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.
Two lines, one install standard
Both lines come in 80% or 96% efficiency, one-stage or two-stage, from 40,000 to 120,000 BTU. The installation is the same; the difference is the equipment and how fast we can install it.
Base: ACiQ
Our value line. It ships from the distributor in Sacramento, so we install about a week after you approve.
Premium: Bryant
Stocked by our local supplier. We install 1–2 days after you approve the estimate and pay the deposit.
Wall furnaces: we replace them with Williams wall furnaces, usually in about half a day.
How we install every furnace
When you compare estimates, compare what’s done around the furnace. This is our standard on every replacement.
- Return air cleaned before the new furnace goes in
- New filter box
- Sediment trap on the gas line
- Fused disconnect at the furnace
- New vent pipe
- Mastic on every duct joint and plenum
- New insulation on the connections we make
Noise Reduction Package
An option for furnaces in an attic, above a bedroom, or next to living space.
What we do
- Vibration isolation for the furnace and the ducts. In an attic, the furnace sits on isolation pads or hangs from the joists.
- A longer or larger return, so air moves more slowly and quietly.
Price
Priced at the site visit, after we see the furnace location and the return.
How it works
- Send your requestPrice your furnace above, request a callback, or call us.
- Free site visitWe look at the furnace, venting, gas line and ducts, and confirm the size.
- Written estimate the same dayOne price for the work we agreed on.
- Approve and pay the deposit10% of the price, never more than $1,000. Then we order your furnace.
- We installPremium (Bryant): 1–2 days after you approve. Base (ACiQ): about a week. We remove the old furnace.
What the price includes
Included
- New furnace from the line you choose
- Our install standard: return cleaned, filter box, sediment trap, fused disconnect, new vent pipe, mastic on every joint and plenum, new insulation on our connections
- Removal of the old furnace
- Start-up and testing
Quoted separately if needed
- Asbestos removal, through our abatement partner
- Duct repair or replacement
- Gas line changes
- Vent liner
- Permit, on request
- Noise Reduction Package
Why homeowners choose Mihas HVAC
The owner does the work
Mihas HVAC is a small, owner-operated, licensed C-20 HVAC contractor (CSLB #1149214) based in South San Francisco. The person who quotes your job is the person who installs it.
Insured
General liability insurance up to $1,000,000 coverage.
Questions
Can I still install a gas furnace in the Bay Area?
Yes. Under Bay Area Air District rules, gas furnaces manufactured 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 vents through a metal flue, usually the one you already have, and costs less. A 96% furnace turns more of the gas into heat and lowers your gas use, but it needs plastic vent pipes to the outside and a condensate drain. We check at the visit whether that venting can be run in your home.
One-stage or two-stage?
A one-stage furnace is either fully on or off. A two-stage furnace runs on low most of the time and switches to high on the coldest days, so it’s quieter and keeps temperatures more even. It costs more.
How long does the installation take?
Most central furnaces take 1 to 2 days. A wall furnace usually takes about half a day.
How soon can you install?
Premium (Bryant) furnaces are installed 1 to 2 days after you approve the estimate and pay the deposit. Base (ACiQ) furnaces ship from Sacramento, so installation is about a week after you approve.
How does the Fix-First Credit work?
Book a repair visit: $49 in South San Francisco, $99 in San Francisco, Daly City and Pacifica. If we can’t fix your furnace, you pay nothing. If we fix it and you replace the furnace with us within 6 months, what you paid for the visit and the repair comes off the new furnace, up to $500. Repairs come with a 1-year warranty.
What if there’s asbestos?
Older furnaces and ducts sometimes have asbestos tape or insulation. We work with an abatement partner and quote the removal separately before any work starts.
Do you pull a permit?
Yes, on request. The permit is quoted separately, and we meet the inspector.
How do I pay?
A 10% deposit when you approve the estimate, never more than $1,000. The deposit is how we order your furnace.
Can you come in the evening or on a weekend?
Yes, on request. Weekend repair visits cost twice the regular visit fee.
Repair or replace?
Tell us what’s going on with your furnace and we’ll call you back.
Prices are estimates for a standard installation and are confirmed at a free site visit. Fix-First Credit: applies to a furnace replacement by Mihas HVAC within 6 months of the paid repair, up to $500. MIHAS HVAC INC, CSLB license #1149214.
