Fast, Reliable Heating & Furnace Across Mission District
Heating and furnace repair in Mission District typically costs $150–$700, with most service calls completed same-day by our Heating & Furnace team. If your Wedgewood or Empire floor furnace is cycling erratically, emitting a faint gas odor, or simply won’t ignite, we’re the Sacramento-based crew that understands what these 1890s–1920s flats actually need. Call (855) 467-1888 for a free estimate.
We’ve been crossing the bridge into San Francisco for sixteen years, and Mission District’s Victorian and Edwardian housing stock is some of the most distinctive we service. The 94110 ZIP is packed with two- and three-unit wood-frame flats built with plaster-and-lath walls, minimal attic clearance, and original floor furnaces that have outlived every manufacturer still in business. Jason Trent, our owner and Field Supervisor, has personally diagnosed failed heat exchangers on Valencia Street, coordinated seismic gas-line strapping with SF-DBI inspectors on Mission Street, and walked homeowners through the reality of what their 1908 building can and cannot accommodate. We’re not guessing at what your flat needs. We’ve already done this work here.
Why Stonegate Heating & Air California Is Mission District’s Preferred Heating & Furnace Company
Sixteen years in business and nearly 500 verified reviews at a 4.7-star average mean we’ve earned our reputation job by job, not through marketing budgets. Mission District customers find us because they’ve been burned by franchise HVAC chains that send whichever tech is available that day, someone who has never seen a Wedgewood floor furnace and treats it like a standard forced-air unit. That doesn’t work here.
Jason Trent supervises every project personally. He’s on-site, not managing from a back office in Sacramento. When we cross into the 94110 ZIP, we bring factory-trained experience across nine brands — Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard — plus the practical knowledge that only comes from repeatedly working on Mission District’s unique building stock. We know which permits SF-DBI requires, how to decommission a floor furnace without damaging plaster walls, and why gas-line seismic strapping isn’t optional in this neighborhood.
Our response time to Mission District is typically same-day for urgent calls. A cracked heat exchanger or gas valve failure in January isn’t a tomorrow problem when your flat has no other heat source. We carry common parts for the brands we service, and we’ve built relationships with San Francisco suppliers for the harder-to-source components these older systems demand.
Our Heating & Furnace Services in Mission District
Furnace Repair
Furnace repair in Mission District runs $150–$700 depending on the component and accessibility. Most calls we get in the 94110 ZIP involve original floor furnaces — Wedgewood and Empire units installed decades before most current homeowners were born. The repair challenge isn’t just the part; it’s finding it. Both manufacturers discontinued most components, so we diagnose whether a repair is genuinely feasible or if we’re throwing good money after a system that cannot be sustained. If your floor furnace has a cracked heat exchanger, we won’t repair it. Carbon monoxide risk through a compromised heat exchanger is a hard stop. We’ll explain exactly what we found and what your options are.
Furnace Replacement
A full furnace replacement in Mission District typically costs $3,500–$7,500, though many of our Mission customers end up choosing a different path entirely. The reality of these flats is that plaster-and-lath walls and zero attic clearance make traditional ducted forced-air installation impractical or destructive. We’ve replaced floor furnaces with modern wall furnaces where ductless isn’t the right fit, and we’ve guided plenty of Valencia Street and Mission Street homeowners toward ductless mini-split systems that handle both heating and cooling. Jason Trent evaluates each building individually. There’s no default recommendation because these flats don’t allow for one.
Furnace Tune-Up
A furnace tune-up in Mission District costs $80–$200 and is the single best investment for extending whatever life your system has left. For Wedgewood and Empire floor furnaces still running, we focus on burner cleaning, gas pressure verification, and heat exchanger inspection. The mild heating loads in Mission District’s climate mean these units don’t cycle as heavily as furnaces in colder regions, but decades of thermal cycling still crack cast-iron heat exchangers. We document everything we find. If your system is approaching the end, you’ll know before it fails on the coldest night of the year.
Heat Exchanger Inspection & Replacement
Heat exchanger failure is the most serious issue we encounter in Mission District’s legacy floor furnaces. A cracked exchanger allows combustion gases, including carbon monoxide, to mix with your home’s air. We inspect with visual examination, combustion analysis, and, where accessible, borescope inspection. Replacement heat exchangers for discontinued Wedgewood and Empire units are essentially unobtainable, which means a confirmed crack typically triggers a full system replacement discussion. We’ll show you what we found, explain why repair isn’t viable, and walk through your replacement options without pressure.
Gas Valve Repair
Gas valve repair in Mission District runs $150–$700. The gas valve controls fuel flow to your burner, and failures manifest as no ignition, delayed ignition, or intermittent shutdowns. In Mission District’s pre-1930 flats, we frequently find gas valves that have been repaired or jury-rigged multiple times, sometimes with incompatible parts. We also encounter unstrapped gas lines that SF-DBI inspectors flag during any permit pull, including for unrelated cooling retrofits. Our gas valve work includes verifying line condition and strapping compliance, because a valve replacement on an unsafe line doesn’t solve the underlying problem.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Mission District
We service nine major HVAC brands — Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard — which means we don’t hit you with the “we don’t service that brand” dead end. For Mission District’s growing number of ductless mini-split installations, we frequently recommend and install Daikin and Bryant systems sized specifically for the heating and cooling loads of these older flats. We stock common parts and maintain supplier relationships across the Bay Area, so most repairs don’t wait on shipping. Whatever brand you have, we’ve worked on it.
Common Heating & Furnace Problems We See in Mission District Homes
- Cracked heat exchangers in original Wedgewood and Empire floor furnaces. Decades of thermal cycling in these cast-iron components eventually cause fractures. We won’t repair past a confirmed crack — carbon monoxide risk is too severe — and we’ll explain your replacement options honestly.
- Unstrapped gas lines flagged during SF-DBI permit inspections. Pre-1930 Mission District flats commonly have gas lines without seismic strapping. Any permit pull, even for an unrelated mini-split installation, triggers inspection. We budget strapping into nearly every job here.
- Parts obsolescence making repairs impossible. Wedgewood and Empire discontinued most floor furnace components years ago. We maintain sourcing relationships, but there’s a point where no part exists. We’ll tell you directly if we’ve reached it.
- Humidity stress on rare existing duct systems. The few Mission District homes with retrofitted ductwork face unique challenges: dry summer heat followed by damp winter fog degrades duct seals and cabinet insulation faster than in more stable climates.
Pricing for Heating & Furnace in Mission District, CA
Here’s what heating and furnace work costs in Mission District’s market:
| Service | Price Range |
|---|---|
| Furnace Repair | $150–$700 |
| Furnace Replacement | $3,500–$7,500 |
| Gas Valve Repair | $150–$700 |
| Tune-Up | $80–$200 |
What drives cost? Accessibility is the big variable in Mission District. A floor furnace in a cramped crawl space with a rusted access hatch takes longer to reach than a standard utility closet unit. Parts availability matters too — discontinued components may require creative sourcing or force a replacement decision. Gas-line strapping, when needed, adds labor and material but isn’t optional for code compliance. We provide upfront pricing before any work begins. Estimates are free — call (855) 467-1888.
The Mission District Difference: Legacy Furnaces in a Changing Climate
The Mission District sits in San Francisco’s warmest microclimate pocket, shielded from Pacific fog by surrounding hills and regularly running 8–15°F hotter than the Outer Sunset or Richmond on the same day. This topographic shelter is driving a wave of first-ever cooling installations in Victorian and Edwardian flats built with absolutely no mechanical cooling infrastructure. Ductless mini-split retrofits have become the dominant HVAC job type in the neighborhood.
Here’s where it gets complicated for homeowners. Many Mission District flats still have original Wedgewood or Empire floor furnaces running on unstrapped gas lines. SF-DBI inspectors routinely flag these during permit pulls for mini-split work. So HVAC techs who actually know this neighborhood budget for furnace decommissioning and gas-line seismic strapping as part of nearly any cooling retrofit job. It’s not an add-on or an upsell. It’s the reality of working on 1910 construction in 2024.
We recently serviced a 1908 Edwardian flat on Valencia Street where the original Wedgewood floor furnace had a fractured heat exchanger and an unstrapped gas line. The homeowner opted for a ductless mini-split system; we decommissioned the furnace, added seismic strapping to the gas line, and installed a Daikin unit. Total cost for the furnace decommissioning and strapping was around $400, separate from the mini-split installation. Jason Trent supervised the job personally.
The 94110 ZIP’s housing stock — two- and three-unit wood-frame flats with plaster-and-lath walls, no attic clearance, and floor furnaces or decorative wall heaters as original heat sources — makes traditional ducted system installation impractical. Nearly every project pushes toward ductless solutions or hydronic radiant upgrades. We don’t pretend otherwise. When we evaluate your flat, we tell you what will actually work.
We Also Serve Cities Near Mission District
Our Heating & Furnace coverage extends throughout San Francisco proper and into Noe Valley, Visitacion Valley, and Chinatown. The same building-stock expertise we bring to Mission District’s Victorians applies to adjacent neighborhoods with similar vintage housing. If you’re in the broader 415 and need a crew that understands pre-war construction, we’re already crossing the bridge.
Serving Mission District, CA — Our Local Coverage Area
We’re based in the Mission District area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs — Heating & Furnace in Mission District
No, you don’t technically have to replace it, but SF-DBI inspectors will flag an unstrapped gas line or active floor furnace with a cracked heat exchanger during the permit process. Most homeowners choose decommissioning because it resolves code issues and eliminates a carbon monoxide risk. Call (855) 467-1888 and we’ll evaluate your specific setup — estimates are free.
San Francisco building code requires seismic strapping on all gas lines, and SF-DBI enforces this during any permit inspection. The strapping isn’t about the furnace — it’s about earthquake safety for the remaining gas infrastructure. Pre-1930 flats in the 94110 ZIP almost always need this added. We handle it as part of our standard decommissioning scope.
Sometimes, if the failure is a control component, gas valve, or burner issue and parts are still available. But Empire discontinued most floor furnace components, and a cracked heat exchanger is non-repairable due to carbon monoxide risk. We’ll inspect yours honestly and tell you whether repair is viable or if replacement is the only safe path. Call for a free evaluation.
Floor furnace decommissioning in Mission District typically runs $300–$500, with gas-line seismic strapping adding $150–$300 depending on line length and access. The total for our recent Valencia Street job was around $400. Every flat is different — plaster wall condition, crawl space access, and line routing all affect labor. We’ll give you an exact number after seeing your setup.
We minimize wall intrusion by accessing floor furnaces through existing grilles or from below in crawl spaces whenever possible. Plaster-and-lath is brittle and unforgiving — we don’t cut into it unless absolutely necessary and only with your explicit approval. Jason Trent, our Field Supervisor, plans each removal to preserve original finishes. If wall access is unavoidable, we’ll explain why and show you exactly what we’re proposing.
Ready to get your Mission District flat’s heat fixed or that old floor furnace evaluated? Call Stonegate Heating & Air California at (855) 467-1888 for a free estimate. Jason Trent supervises every job personally.
Written by Jason Trent, Owner and Field Supervisor at Stonegate Heating & Air California, serving Sacramento and the Bay Area since 2008.