Fast, Reliable Heating & Furnace Across San Francisco
Furnace repair in San Francisco typically runs $175–$825, and most calls in the 94117, 94118, 94119, and 94120 ZIP codes get same-day or next-day response. Call (844) 875-9451 for a free estimate.
We’ve been dispatching our Heating & Furnace team to San Francisco for 13 years, and we’ve learned that this city breaks every standard HVAC assumption. The Victorian rowhouses in the Mission District, the Edwardian flats climbing Noe Valley’s hills, the subdivided buildings in Chinatown — none of them were built for forced-air systems. Gregory Hahn founded this company and still leads every technical decision, which means when you call Redwood Heating & Air, you’re getting owner-level accountability on every job, not a franchise dispatcher sending whoever’s available.
Parking’s tight. Alley access is narrower than code. Shared party walls mean you can’t just cut ducts through wherever you want. We’ve hand-carried equipment through rear yards in Noe Valley, coordinated electrician pulls for 100-amp panel upgrades in Visitacion Valley, and routed refrigerant lines through spaces that would make a standard suburban HVAC crew walk away. That’s the reality of heating work in San Francisco, and it’s why local experience matters more here than almost anywhere else we serve.
Why Redwood Heating & Air San Diego Is San Francisco’s Preferred Heating & Furnace Company
Our reputation in San Francisco was built one difficult job at a time. 428 verified customer reviews averaging 4.6 stars — and a significant share of those come from San Francisco homeowners who’d already been told their building was “too complicated” by other companies. We don’t use that word.
Gregory Hahn holds a Master Technician designation, and that credential rides in the truck with him on every call. Customers in San Francisco get the same technician who diagnosed a failed heat exchanger in a Chinatown basement flat last Tuesday and a corroded condenser coil on a west-facing Richmond rooftop last Thursday. The marine layer, the salt air, the microclimates — these aren’t abstract concepts to us. We’ve replaced floor furnaces in buildings where the original 1920s wiring was still live, and we’ve coordinated permits for jobs that required navigating San Francisco’s layered historic-preservation and mechanical-code requirements.
Response time to San Francisco averages same-day for emergency calls and next-day for standard scheduling. We stock parts for Carrier, Trane, Bryant, and American Standard systems locally, which means most repairs don’t wait on shipping. From a single mini-split to a full commercial system, we diagnose right the first time because we’ve seen these specific San Francisco failure modes before.
Our Heating & Furnace Services in San Francisco
Furnace Repair
Most San Francisco homes don’t have furnaces in the conventional sense — they have floor furnaces, wall heaters, or ductless systems that serve the same function. When a 40-year-old floor furnace fails in a Mission District Victorian, the repair isn’t just swapping a part. It’s diagnosing whether the unit failed from age, from the building’s chronic moisture issues, or from an electrical system that can’t deliver clean voltage. Our furnace repair runs $175–$825 depending on part and labor, and we carry ignitors, gas valves, and control boards for the brands we service.
Furnace Replacement
Replacing a heating system in San Francisco almost always means rethinking the entire approach. The original equipment was sized for a different era, and the building’s electrical infrastructure may not support modern loads. In a Noe Valley Edwardian flat, we replaced a failed 40-year-old floor furnace with a Daikin ductless mini-split. The tight, alley-access required us to hand-carry components through the rear yard, and we coordinated with an electrician to upgrade the building’s 100-amp panel — a typical one-two punch in this city. Furnace replacement in San Francisco ranges $4,130–$8,850, including equipment, labor, and necessary electrical coordination.
Furnace Tune-Up
A tune-up in San Francisco isn’t a generic checklist. We inspect for salt-air corrosion on any outdoor components, check refrigerant line insulation degradation from UV and marine exposure, and verify that electrical connections can handle the load demands of modern equipment. For $95–$235, we catch the problems that turn into emergency calls — failed ignitors, cracked heat exchangers, gas valves sticking from years of intermittent use.
Heat Exchanger Inspection & Replacement
Cracked heat exchangers are a genuine safety hazard, and in San Francisco’s older housing stock, we find them more often than you’d expect. Floor furnaces and wall heaters in pre-1940s buildings have often been running past their design life. We use combustion analysis and visual inspection to verify integrity, and if replacement is needed, we coordinate the full scope — gas line work, venting modifications, and the electrical upgrades that often accompany the job. We don’t patch around a cracked exchanger. We replace it properly, with permits, because carbon monoxide in a tightly sealed Victorian flat is not a risk anyone should take.
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 San Francisco
We service your brand — whether it’s the Carrier system in a new SOMA condo, the Trane unit in a Pacific Heights renovation, or the Bryant equipment that came with your building. Gregory Hahn is factory-trained or field-experienced across nine major HVAC brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. We stock common parts for San Francisco customers locally, which means faster turnaround on repairs and less downtime when the fog rolls in and you actually need heat. Our multi-brand fluency matters especially in this city, where buildings have been renovated in layers over decades and the equipment often reflects whoever was working cheapest at the time.
Common Heating & Furnace Problems We See in San Francisco Homes
- Aging electrical panels can’t support new equipment. Many San Francisco buildings still run on 100-amp services installed when floor furnaces and incandescent bulbs were the only electrical loads. Adding a modern mini-split or heat pump often requires a panel upgrade — something we coordinate with licensed electricians as part of the project, not as a surprise add-on.
- Salt-laden coastal air corrodes outdoor components. The marine layer that keeps San Francisco mild also carries salt that attacks condenser coils, electrical connections, and refrigerant line insulation. West-facing and rooftop installations in the Sunset, Richmond, and western Noe Valley show this damage faster than protected east-facing systems.
- Segmented floor plans and shared party walls block standard zoning. Victorian flats divided into multiple units over the decades create heating zones that don’t match the original building layout. Routing refrigerant lines or venting through shared party walls requires creative problem-solving and respect for neighboring units — something our 13 years in dense urban housing has taught us thoroughly.
- Floor furnaces fail from decades of intermittent use. These units, common in pre-war San Francisco buildings, sit unused for months then get called on for concentrated duty during cold snaps. Thermal cycling cracks heat exchangers, and the confined installation spaces make repairs difficult and replacement often the smarter long-term choice.
Pricing for Heating & Furnace in San Francisco, CA
We publish our ranges because San Francisco homeowners research before they call, and vague “it depends” answers waste everyone’s time. Here’s what heating and furnace work costs in this market:
| Service | Price Range in San Francisco |
|---|---|
| Furnace Repair | $175–$825 |
| Furnace Replacement | $4,130–$8,850 |
| Furnace Tune-Up | $95–$235 |
What moves a job toward the higher end? Electrical panel upgrades (common here), access challenges in buildings with no rear yard or narrow alley entry, and the need to coordinate with other trades. What keeps it lower? Straightforward part swaps on accessible equipment, early-season scheduling before the first cold snap, and systems we’ve maintained regularly. Every estimate is free, and we itemize before any work begins. Call (844) 875-9451 to schedule yours.
We Also Serve Cities Near San Francisco
Our service radius covers the full urban core, including the Mission District, Noe Valley, Chinatown, and Visitacion Valley. Whether you’re managing a multi-unit building in Chinatown with original floor furnaces or need emergency response to a Noe Valley flat with a failed heat pump on a foggy January morning, our Heating & Furnace team knows the access patterns, parking constraints, and building types of each neighborhood. Same-day service is often available.
Serving San Francisco, CA — Our Local Coverage Area
We’re based in the San Francisco 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 San Francisco
San Francisco’s housing stock is overwhelmingly Victorian and Edwardian rowhouses and flats built before forced-air systems existed, meaning the vast majority of residential buildings in these ZIP codes have no ductwork whatsoever. Retrofitting ducts would require major reconstruction of shared party walls and dense floor plans. Ductless mini-splits deliver heating and cooling without that destructive scope, which is why they’re the default solution here rather than the exception. Call (844) 875-9451 for a free assessment of your specific building.
You often do, especially if your building still has its original 100-amp service. During San Francisco’s occasional extreme heat events, the wave of homeowners installing their first-ever air conditioning unit collides with this chronic problem: aging Victorian-era electrical panels cannot support a new mini-split without a full panel upgrade. We routinely coordinate a same-project electrician pull just to complete a single residential install, and we factor this into our replacement estimates so you’re not surprised mid-project. Call (844) 875-9451 to check your panel capacity.
The marine layer keeps temperatures mild but carries salt that accelerates corrosion on outdoor condenser coils and refrigerant line insulation, particularly on west-facing and rooftop installations. Equipment in the fog belt — western Sunset, Richmond, and exposed Noe Valley slopes — typically shows this damage 20–30% faster than protected east-facing systems. Our tune-ups include specific inspection for salt-air degradation, and we specify corrosion-resistant hardware for coastal-exposed installations. Call (844) 875-9451 to schedule preventive maintenance.
Yes, and we’ve done it many times. In a Noe Valley Edwardian flat, we replaced a failed 40-year-old floor furnace with a Daikin ductless mini-split, hand-carrying components through a narrow rear yard and coordinating an electrician for the panel upgrade. These jobs require creative access solutions and respect for neighboring units, but they’re standard work for us after 13 years in San Francisco’s dense housing stock. Call (844) 875-9451 for a free estimate on your specific layout.
We service Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard — and we carry common parts for San Francisco customers locally. Gregory Hahn’s Master Technician designation covers factory training or equivalent field experience across all nine brands, so we diagnose based on the equipment’s actual condition rather than pushing replacement because we don’t know your system. Call (844) 875-9451 with your model number for same-day availability.
Ready to get your San Francisco home’s heating system diagnosed right the first time? Call (844) 875-9451 for a free estimate. Gregory Hahn and our team at Redwood Heating & Air serve San Francisco with 13 years of master-technician expertise, 428+ verified reviews, and the multi-brand knowledge to fix what others walk away from.
Written by Gregory Hahn, Owner at Redwood Heating & Air, serving San Francisco since 2012.