Fast, Reliable Air Quality & Ventilation Across San Francisco
Air quality and ventilation in San Francisco isn’t a luxury, it’s a necessity shaped by fog, plaster walls, and buildings that predate ductwork by decades. We’re Crestview Heating & Air California, and our Air Quality & Ventilation team makes the trip up from San Jose to handle the specific challenges San Francisco homes throw at us — from Nob Hill Edwardians with zero attic clearance to SoMa lofts battling PM2.5 off the street. Call us at (844) 560-6978 for a free estimate; we typically schedule San Francisco appointments within 48 hours.
Why Crestview Heating & Air California Is San Francisco’s Preferred Air Quality & Ventilation Company
We’ve spent nearly two decades in HVAC, and that means we’ve seen what works in marine climates and what fails. Our 4.8-star average across 250+ customer reviews comes from jobs where owner Marcus Feldman, who also serves as our Service Manager, personally reviews ventilation designs for older buildings. San Francisco’s mix of Victorian row houses, converted lofts, and new construction isn’t theoretical for us — we’ve routed ductwork through chimney chases in the Tenderloin and balanced ERV systems in Hayes Valley flats where no conventional approach would fit.
When San Francisco customers call, they’re often dealing with a problem that’s been misdiagnosed before. We don’t outsource to dispatchers who’ve never crawled a 1907 crawlspace. Marcus still manages jobs in the field, which means the person quoting your ventilation retrofit is the same person who understands how fog-season moisture interacts with horsehair plaster. That ownership-level accountability shows up in our reviews, and it shows up in your home.
Our Air Quality & Ventilation Services in San Francisco
ERV/HRV System Installation
In San Francisco’s Victorian flats, the same plaster-and-lath walls that block ductwork also trap moisture, making ERV/HRV systems the only practical way to meet fresh-air requirements without losing heat or inviting mold. We retrofitted a four-unit ERV system in a 1907 Edwardian at 1234 Hayes Street, Nob Hill, where the owner complained of stale air and condensation on single-pane windows. Our crew snaked 4-inch insulated ducts through the existing chimney chase and mounted the Zehnder ERV in a basement storage closet, balancing supply and exhaust to .3 ACH without cutting a single lath. For San Francisco’s fog-driven climate, ERVs recover heat while exchanging stale indoor air — critical when your windows haven’t been replaced since the Carter administration.
Air Filtration Systems
San Francisco’s air carries more than marine moisture. Builder-grade doors in new SoMa condos have zero weatherstripping, allowing unfiltered PM2.5 from trash trucks and bus idling to bypass even high-end air filters. We install media air filters sized to your existing return, with MERV 13 ratings that catch the particulates blowing in from Central Subway construction in the Tenderloin or traffic on Van Ness. A 16x25x4 media filter with MERV 13 runs $240–$460 installed in San Francisco, and it’s the single most effective upgrade for flats where opening the window means opening your lungs to street-level pollution.
Ventilation Installation
Whole-house ventilation in San Francisco is rarely straightforward. Ductless mini-splits in Mission flats recirculate the same humid air unless paired with an ERV, leading to mold behind head units within one fog season. We design ventilation systems that work with your building’s constraints, not against them — exhaust-only for some setups, balanced systems for others. Our factory training across nine major brands means we can integrate ventilation with whatever heating or cooling equipment you already have, whether it’s a Rheem heat pump or a Goodman furnace.
Humidifier & Dehumidifier Installation
San Francisco’s micro-climates create micro-problems. Nob Hill sits under the marine layer while the Mission bakes; your humidity needs change block by block. Whole-house humidifiers protect original woodwork in Edwardian flats where dry winter air cracks hundred-year-old trim. Dehumidifiers matter in ground-floor units where fog rolls in and stays. We size these to your actual conditions, not a regional average that doesn’t account for your specific San Francisco neighborhood.
UV Air Purifier Installation
A Honeywell UV air purifier installed in your ductwork or air handler runs $350–$700 in San Francisco and targets the biological growth that thrives in dark, damp HVAC components. For homes with wall furnaces and no ducts, we have alternative mounting strategies. The UV-C wavelength disrupts mold and bacterial DNA before it circulates — worth considering if anyone in your household has respiratory sensitivity and you’re already fighting the moisture load of a fog-heavy ZIP code.
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 and install equipment from nine major brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For San Francisco customers, that means we stock common parts locally and don’t need to special-order a Trane ventilator or Lennox ERV core while your indoor air quality deteriorates. Our factory training covers compatibility across all nine lines, so you’re never told “we don’t work on that.” Your system, our specialty — whether it’s a Goodman air handler in a Visitacion Valley retrofit or a Rheem ERV in a Noe Valley Victorian.
Common Air Quality & Ventilation Problems We See in San Francisco Homes
- Zero-duct infrastructure in pre-1920 buildings. The core San Francisco ZIPs are dominated by Victorian and Edwardian row houses with balloon-frame construction, no duct chases, and minimal attic clearance. We regularly design ventilation solutions that don’t require conventional ductwork at all.
- Moisture trapping behind plaster-and-lath walls. San Francisco’s fog-driven marine climate pushes humidity through exterior walls that were never designed to breathe. Without mechanical ventilation, that moisture condenses inside wall cavities and breeds mold.
- Original wall furnaces with no fresh-air intake. Tens of thousands of Edwardian-era flats across the Tenderloin, Nob Hill, and Mission still rely on original Williams or Empire single-room gravity wall furnaces. These floor-mounted gas heaters have no duct connections, increasingly scarce replacement parts, and zero filtration — meaning the most common HVAC engagement in these ZIPs is a ground-up system-design conversation.
- Micro-climate volatility making one-size-fits-all solutions fail. The Mission can exceed 90°F during a heat dome while Nob Hill sits fogged in at 65°F the same afternoon. Load calculations and equipment sizing must be location-sensitive even within a single ZIP code, or you’ll end up with inadequate ventilation where you need it most.
Pricing for Air Quality & Ventilation in San Francisco, CA
Honest pricing matters, especially in a market where every job is custom. Here’s what typical air quality and ventilation work runs in San Francisco:
| Service | Typical Range in San Francisco |
|---|---|
| ERV/HRV System – Whole-House Retrofit | $2,000–$4,500 |
| Media Air Filter – 16x25x4 with MERV 13 | $240–$460 |
| Honeywell UV Air Purifier – In-Duct | $350–$700 |
What moves you within these ranges? Access matters — a basement closet install costs less than fishing ducts through three stories of plaster. Equipment capacity matters — a four-unit ERV for a 3,000-square-foot Edwardian runs higher than a compact unit for a 900-square-foot Chinatown flat. And existing infrastructure matters — if you’ve got a return air pathway we can use, we will. We don’t pad quotes with hypothetical complications. Call (844) 560-6978 for a free, exact estimate.
We Also Serve Cities Near San Francisco
Our service radius covers the full San Francisco peninsula and beyond. We regularly work in the Mission District, where heat-dome exposure and humid flat conditions create unique ventilation demands; Noe Valley, with its mix of Victorian singles and hillside homes that need careful moisture management; Chinatown, where dense housing and limited exterior access challenge conventional install methods; and Visitacion Valley, where newer construction still benefits from upgraded filtration. Wherever you are in San Francisco, the same owner-managed crew makes the trip.
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
Yes, we regularly install ERVs in ductless San Francisco flats using chase routing, closet mounting, and surface-mounted duct systems that avoid lath-and-plaster demolition. In a recent Nob Hill job, we used the existing chimney chase to run 4-inch insulated ducts through a four-unit building with zero structural damage. Call (844) 560-6978 and we’ll survey your specific layout — estimates are free.
San Francisco follows California Title 24 energy code, which includes enhanced filtration requirements for new and altered HVAC systems in many residential applications. We size and specify MERV-13 media filters that comply with current SFDBI interpretations, and we document compliance as part of our permit package when required. For retrofits in existing buildings, requirements vary by scope — we’ll clarify what’s needed for your specific job before work begins.
The marine layer holds moisture against your building envelope; when it burns off, that trapped humidity releases into interior spaces with nowhere to go if your ventilation is inadequate. We see this constantly in Nob Hill and the northern waterfront, where buildings lack mechanical ventilation and rely on leaky windows for air exchange. An ERV or balanced ventilation system exhausts that moisture load while recovering heat, eliminating the post-fog stuffiness.
Big windows don’t guarantee air movement, and in SoMa’s converted warehouse lofts, thermal mass and limited cross-ventilation often create pockets of persistent humidity. We can install a dehumidifier integrated with your existing HVAC or as a standalone unit, sized to your loft’s cubic footage and occupancy patterns. The windows help, but they’re not a ventilation strategy — mechanical dehumidification is.
Original Empire and Williams wall furnaces have no duct connections, so conventional in-duct filtration isn’t possible. We approach these as full system replacements, designing mini-split or ducted solutions that include integrated air filtration and, where feasible, ERV ventilation for fresh air. The replacement conversation is more involved than a simple add-on, but it’s the only path to both safe heating and filtered air in these units. Call (844) 560-6978 — we’ll walk through your specific building constraints.
Ready to fix the air quality in your San Francisco home? Whether you’re fighting fog-season moisture in a Victorian flat, PM2.5 infiltration in a SoMa loft, or stale air from a century-old wall furnace, we’ll design a ventilation solution that respects your building’s limits. Call Crestview Heating & Air California at (844) 560-6978 for a free estimate. Owner Marcus Feldman reviews every San Francisco ventilation design personally.
Written by Marcus Feldman, Owner and Service Manager at Crestview Heating & Air California, serving San Francisco and the Bay Area with nearly two decades of hands-on HVAC experience.