Fast, Reliable Air Quality & Ventilation Across San Francisco
Air quality and ventilation work in San Francisco runs $175 for a basic UV air purifier install up to $8,850 for a full ERV or HRV system in a multi-unit Victorian flat. Most San Francisco homeowners call us after noticing persistent mustiness, worsening allergies, or realizing their century-old building traps cooking odors and moisture between units. We make the trip from Sacramento to San Francisco regularly, and we’ve learned the city’s housing stock well enough to quote accurately before we arrive. Call (855) 467-1888 for a free estimate.
San Francisco’s marine layer isn’t gentle on HVAC equipment. Salt-laden fog rolling in from the Pacific accelerates corrosion on outdoor components, while the city’s famous Victorian and Edwardian flats, built without ductwork between 1880 and 1920, present retrofit challenges no inland contractor faces. Our Air Quality & Ventilation team has spent 16 years solving exactly these problems, from Capp Street in the Mission to the narrow row houses of the Tenderloin.
Why Stonegate Heating & Air California Is San Francisco’s Preferred Air Quality & Ventilation Company
We’ve earned 499 verified reviews at a 4.7-star average across 16 years in business, and a growing share of those come from San Francisco property owners who found us after local contractors couldn’t handle their building’s quirks. Owner Jason Trent serves as Field Supervisor on jobs, meaning the person with final say on your installation is physically present, not routing calls from a back office.
Our familiarity with San Francisco’s housing runs deep. We’ve fished 240V circuits through balloon-frame lath and plaster in the Mission, sized ERV systems for TICs with three separate owners, and replaced condensers pitted by salt fog within four years of installation. That experience translates to faster, more accurate quotes and fewer return trips.
We service nine major HVAC brands, Carrier and Trane among them, so “we don’t work on that unit” isn’t something you’ll hear from our technicians. From a single-room mini split to a full commercial system, we handle the scope ourselves rather than subcontracting or referring out.
Our Air Quality & Ventilation Services in San Francisco
Air Filtration Systems
San Francisco’s outdoor air quality varies dramatically by neighborhood and season. The eastern neighborhoods we serve, the Mission and SoMa especially, sit in a thermal belt that traps particulates from traffic and industry, while wildfire smoke from across the Bay Area can push AQI into hazardous ranges for weeks. We install whole-house filtration on forced-air systems and standalone units for homes without ductwork, sizing filters to actual load rather than guessing. For the Victorian flats common in ZIPs 94117 and 94118, we often pair a high-MERV media filter with a dedicated return path, since the original construction never included one.
UV Air Purifier Installation
UV lamps neutralize mold, bacteria, and viruses in your HVAC system or ductless mini-split’s indoor coil. In San Francisco, we’ve learned to specify sealed UV housings and shorter replacement intervals, humid, salty air in unsealed crawl spaces and basement mechanical rooms degrades bulb life faster than manufacturer specs assume. A typical UV air purifier installation in San Francisco runs $175–$765, depending on whether we’re adding it to an existing system or integrating it during a new mini-split install. Last summer we replaced a corroded Daikin condenser in a 3-unit TIC on Capp Street; the original unit, installed just four years prior, had salt pitting on every fin. We installed a new unit with a blue-fin anti-corrosion coating and added a UV air purifier inside the shared hallway, fishing a 240V circuit through balloon-frame lath and plaster.
ERV & HRV System Installation
Energy Recovery Ventilators and Heat Recovery Ventilators bring fresh outdoor air into tightly sealed homes without wasting the energy you’ve already spent heating or cooling. In San Francisco’s Edwardian flats, where owners have finally air-sealed decades of drafts, ERV/HRV systems prevent the stale, CO2-heavy air that otherwise builds up between units. The catch: these buildings have no ductwork, and routing intake/exhaust through shared walls requires coordination across TIC owners. An ERV/HRV system install in San Francisco typically costs $4,130–$8,850, reflecting the custom routing and electrical work. We also specify marine-grade intake screens, standard screens clog with salt residue within months in this climate.
Humidifier & Dehumidifier Installation
San Francisco’s foggy summers and dry winter heating seasons create a split personality for indoor humidity. The outer Sunset and Richmond stay damp year-round, but the Mission and Tenderloin can swing from 70% RH in July to 25% once the wall furnace kicks on in January. We install whole-house humidifiers on forced-air systems and standalone dehumidifiers for ductless homes, always checking whether your building’s electrical can handle the load, many of these flats still run on 60-amp services.
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 San Francisco
We maintain factory-trained experience across nine brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For San Francisco customers, that means whatever equipment is already in your building, we can service it without a learning curve. We stock common filtration media, UV lamps, and ERV core replacements to minimize wait times, critical when your intake screen is choked with salt residue and the whole flat feels stale.
Common Air Quality & Ventilation Problems We See in San Francisco Homes
- Condenser coil corrosion from salt fog. In eastern neighborhoods like the Mission, salt-laden fog accelerates corrosion on mini-split condenser coils within 3–5 years, far faster than inland, leading to refrigerant leaks and failed compressors. We specify blue-fin or epoxy-coated coils for coastal installations.
- ERV/HRV intake screens clogging with marine salt residue. Tightly sealed Edwardian flats depend on mechanical ventilation, but standard intake screens choke within months in San Francisco’s marine air. We clean screens on every maintenance visit and upgrade to corrosion-resistant mesh where needed.
- UV air purifier lamps failing prematurely. Humid, salty air in unsealed crawl spaces and mechanical closets shortens bulb life below manufacturer ratings. We install sealed housings and recommend 9-month replacement cycles rather than annual.
- Inter-unit odor transfer in multi-flat buildings. Balloon-frame construction with no fireblocking means cooking smells, vape residue, and moisture migrate between floors. Properly balanced ventilation with dedicated exhaust per unit, not just a shared hallway grille, solves this.
Pricing for Air Quality & Ventilation in San Francisco, CA
Honest numbers for San Francisco’s market:
| Service | Typical Range in San Francisco |
|---|---|
| UV Air Purifier Installation | $175–$765 |
| ERV/HRV System Install | $4,130–$8,850 |
What moves the needle within these ranges: electrical access (fishing new 240V through lath and plaster adds labor), unit count in TIC buildings, and whether we’re integrating with existing mini-split refrigerant lines or starting from scratch. We don’t quote over the phone for ERV/HRV work without seeing the building, free estimates let us give you a firm number. Call (855) 467-1888 to schedule.
We Also Serve Cities Near San Francisco
Our route from Sacramento brings us through the Mission District, Noe Valley, Chinatown, and Visitacion Valley regularly. If you’re in these neighborhoods or anywhere in San Francisco proper, the same technician who quotes your job performs the work, no handoffs to unfamiliar subs.
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 — Air Quality & Ventilation in San Francisco
Salt-laden fog accelerates corrosion on metal components, particularly mini-split condenser coils and ERV intake screens. In the Mission and Tenderloin, we see coil failure within 3–5 years versus 10+ inland. We combat this with blue-fin anti-corrosion coatings, marine-grade hardware, and more frequent maintenance intervals. Call (855) 467-1888 for a corrosion inspection.
Yes, but it requires a ductless HRV design with wall-mounted intake/exhaust grilles and a central core, plus electrical routing through shared walls. We’ve done this in multiple San Francisco TICs, the key constraint is owner coordination, not technical feasibility. Cost typically falls in the $4,130–$8,850 range depending on unit count. Call for a free estimate.
A mini-split filters air only in the room where it’s installed, and its standard filter captures dust, not pathogens or VOCs. For whole-flat coverage in San Francisco’s multi-room Victorians, we recommend either a ducted air purifier on a dedicated return or a UV lamp in the mini-split’s indoor unit. The right choice depends on your building layout, call (855) 467-1888 and we’ll assess it.
In San Francisco’s humid, salty air, we recommend every 9 months rather than the standard 12. Unsealed crawl spaces and basement mechanical rooms degrade bulbs faster than manufacturer specs assume. We track replacement dates for our maintenance customers and call before failure. Schedule with (855) 467-1888.
The Mission’s thermal belt traps pollen and particulates at higher concentrations than the western fog belt. We typically specify MERV 13 media filters with a dedicated return path, since Victorian flats lack the ductwork for standard whole-house systems. For buildings with mini-splits, standalone HEPA units in bedrooms supplement the main filtration. Call (855) 467-1888 for a recommendation tailored to your flat.
Written by Jason Trent, Owner at Stonegate Heating & Air California, serving San Francisco since 2008.