Fast, Reliable Heating & Furnace Across Mission District
Heating repair in Mission District typically runs $150–$700 for most furnace issues, and we can usually diagnose the problem same-day. For homes with original floor furnaces or aging wall heaters, replacement often involves permit-required gas and carpentry work that newer neighborhoods never face.
We’ve been serving the Mission District’s pre-WWI housing stock for 13 years, and we know the difference between a straightforward repair and a job that’ll turn into a code-compliance project. Gregory Hahn founded this company and still leads every technical decision, so when our truck pulls up to your flat on Valencia Street or 24th Street, you’re getting owner-level accountability, not a franchise dispatcher. Call (844) 875-9451 for a free estimate.
Why Redwood Heating & Air San Diego Is Mission District’s Preferred Heating & Furnace Company
Our reputation in Mission District was built one Edwardian flat at a time. We’ve got 428 verified customer reviews averaging 4.6 stars, earned over 13 continuous years, and a significant share of them come from repeat calls in the 94110 zip code. That matters in a neighborhood where the housing stock is unforgiving and a rushed job means a callback.
Response time to Mission District averages under 90 minutes for emergency calls, because we’re not routing from some dispatch center in the East Bay. We’re local. We know that a failed floor furnace on a foggy January morning isn’t just uncomfortable, it’s a genuine safety concern, especially in multi-unit buildings where tenants have no alternative heat source.
Gregory Hahn holds a Master Technician designation, and that credential is on the truck, not in a corporate office. We service your brand, whether it’s a 1990s Rheem wall heater in a Mission Street duplex or a newer Lennox system in a renovated Valencia Street condo. From a single mini-split to a full commercial system, we’ve handled it.
Our Heating & Furnace Services in Mission District
Furnace Repair
Furnace repair in Mission District homes usually means addressing floor furnaces or wall heaters in 100-year-old flats, not standard forced-air systems. We see cracked heat exchangers from decades of thermal cycling, gas valves corroded by salt air that drifts in from the coast, and pilot assemblies that fail because they’ve been burning in dusty, undersized utility closets since the Reagan administration. Diagnosed right the first time means we check the whole system, not just the symptom.
Furnace Replacement
Replacing a furnace in Mission District is rarely a simple swap. The original floor furnaces recessed in hardwood floors have gas stubs at floor level, clearances are near zero, and the subfloor framing often needs modification just to seat a modern wall heater. On a recent job on 24th Street, we replaced a 1920s gravity-fed floor furnace in an Edwardian flat with a modern ductless mini-split system. The gas stub at floor level required subfloor modifications, and the old cross-linked gas line had to be upgraded to meet current code, a job that turned a simple swap into a full permit-required gas-and-carpentry project. We handle the permit, the gas re-pipe, and the finish carpentry.
Furnace Tune-Up
A furnace tune-up in Mission District runs $80–$200 and is worth every dollar on a pre-WWI system. We check heat exchanger integrity with a visual inspection and combustion analysis, test gas pressure at the valve, and inspect the venting for proper draft. In flats with original gravity wall heaters, we also evaluate whether the gas stub-out and surrounding framing can handle another decade of service. Catching a cracked exchanger early prevents a mid-winter CO emergency.
Heat Exchanger Inspection & Replacement
Heat exchanger failure is the end of the road for most floor furnaces in Mission District. These units develop cracks from age and thermal stress, often undetectable until a CO detector alarms or a technician spots flame rollout during routine service. We don’t patch heat exchangers, we replace them or recommend full system replacement when the surrounding infrastructure won’t support another heating season safely.
Gas Valve Repair
Salt-air from the nearby coast accelerates rust on gas-valve components and pilot assemblies in wall heaters and floor furnaces throughout Mission District. A sticking gas valve can cause delayed ignition, rollout, or complete failure to fire. We stock replacement valves for major brands and can often source same-day parts for Trane, Lennox, Rheem, and Goodman systems common in local retrofits.
Ignitor Replacement
Modern spark and hot-surface ignitors fail regularly in the dusty environments of Mission’s old utility areas. We carry universal and OEM ignitors for the brands we service, and we’ll verify that the control board is sending proper voltage before swapping parts. No guesswork.
What happens when you call
- 1
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 your brand. Our technicians are factory-trained or field-experienced across nine major HVAC brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For Mission District customers, that means we don’t try to shoehorn a single-brand solution into a building that was never designed for it. We stock common parts locally for Trane, Lennox, Rheem, and Goodman systems, which keeps turnaround tight when you’re staring at a cold flat in January. If you’ve got a brand we don’t see often, we source fast. 13 years, 428+ reviews, and we’ve learned that the right fix beats the convenient upsell every time.
Common Heating & Furnace Problems We See in Mission District Homes
- Cracked floor-furnace heat exchangers. These gravity-fed units recessed in hardwood floors develop cracks from decades of thermal expansion and contraction. Often there’s no visible symptom until a CO detector sounds, or until we spot flame rollout during a tune-up. Replacement is the only safe option.
- Corroded gas valves and pilot assemblies from salt air. The Mission’s proximity to the coast means salt-laden marine air penetrates utility closets and crawl spaces, accelerating rust on gas-valve bodies and pilot tubing. We see this on wall heaters and floor furnaces alike, and we replace with corrosion-resistant components where possible.
- Undersized or corroded original gas stub-outs. The ½-inch gas lines stubbed into 1910s flats were sized for 30,000 BTU floor furnaces, not modern 50,000+ BTU wall heaters or ductless condensers. We frequently find corrosion at the threads that requires full re-piping from the meter set before any new equipment can be connected safely.
- “Second summer” cooling demand overwhelming aging systems. In September and October, when Twin Peaks and Bernal Heights block the fog and temperatures climb into the mid-80s, Mission District residents who’ve never needed cooling suddenly do. Their floor furnaces can’t help, and window units are often prohibited in historic flats. This drives demand for ductless mini-split installations that our Heating & Furnace team handles regularly.
Pricing for Heating & Furnace in Mission District, CA
Here’s what heating work actually costs in Mission District. These ranges reflect real jobs we’ve completed in 94110 over the past two years.
| Service | Typical Range in Mission District |
|---|---|
| Furnace Repair | $150–$700 |
| Furnace Tune-Up | $80–$200 |
| Furnace Replacement (floor furnace to wall heater) | $2,800–$5,500* |
| Ductless Mini-Split Installation (single zone) | $3,500–$6,500* |
| Gas Valve Replacement | $280–$620 |
| Heat Exchanger Replacement | $1,200–$2,400 |
*Replacement and installation costs vary significantly based on permit requirements, gas re-pipe needs, electrical upgrades, and subfloor modifications common in Mission District’s pre-WWI housing.
What moves the needle on cost? Three things in Mission District: permit requirements (most floor furnace replacements trigger a San Francisco DBI permit), gas re-piping from corroded original stubs, and electrical upgrades when we find knob-and-tube or early armored cable near the heater location. We quote upfront, before any work starts. Call (844) 875-9451 for a free estimate.
We Also Serve Cities Near Mission District
Our service area extends throughout San Francisco and into adjacent neighborhoods. We regularly run calls in Noe Valley for Victorian heating retrofits, Visitacion Valley for commercial and residential furnace work, and Chinatown where the building stock and code challenges mirror what we see in Mission District. If you’re in San Francisco proper and need heating service, we’re likely already in the neighborhood.
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
Floor furnaces fail more often here because most are original to 1890s–1910s Edwardian flats and have been thermally cycling for 80–100 years. The recessed installation in hardwood floors exposes heat exchangers to moisture from below and limits airflow, accelerating metal fatigue. Call (844) 875-9451 if you suspect yours is failing, we inspect for cracks as part of any service call.
No. San Francisco DBI requires a permit for any floor furnace replacement because it involves gas line modification, venting changes, and combustion air requirements. We’ve never seen a Mission District floor-furnace swap that didn’t require at least a plumbing permit and often an electrical permit too. We handle the permit application as part of our project scope.
Mission District’s housing stock was built before forced-air heating existed, so there’s no duct chases, no basement mechanical room, and no attic space for routing. A new furnace means either a wall heater with direct venting through the exterior wall, or a ductless mini-split system that moves refrigerant through a small line set instead of air through ducts. The latter is increasingly what Mission District homeowners choose, especially after experiencing a “second summer” September heat wave.
The Mission’s banana-belt microclimate, sheltered from marine fog by Twin Peaks and the western hills, means residents use heating less than fog-belt neighborhoods but often more intensely when they do, because flats cool down unevenly without insulation. The bigger impact is the surprise cooling demand in September–October when temperatures hit the mid-80s, driving interest in heat-pump-equipped ductless systems that handle both heating and cooling without any ductwork.
Yes, it’s common. Many Mission District flats still have active knob-and-tube or early armored-cable electrical that was never upgraded because it wasn’t required until a major renovation triggered code compliance. When we install any new heating equipment, we inspect the circuit serving the heater. If the wiring won’t handle the load of a modern ignition system or blower, we flag it and coordinate with a licensed electrician, we don’t jury-rig around it. Call (844) 875-9451 and we’ll assess what you’re working with.
Ready to get your Mission District heating system diagnosed right the first time? Call Redwood Heating & Air San Diego at (844) 875-9451 for a free estimate. Gregory Hahn or one of our Master Technician-credentialed team will walk your job, explain what your 100-year-old flat actually needs, and quote upfront before any work begins.
Written by Gregory Hahn, Owner at Redwood Heating & Air San Diego, serving Mission District and San Francisco since 2011.