Fast, Reliable Air Quality & Ventilation Across Pomona
Air quality and ventilation work in Pomona isn’t plug-and-play. The city’s inland valley heat, monsoon humidity, and thousands of homes still running on evaporative cooler infrastructure mean generic solutions fail here. We make the drive from Sacramento to Pomona regularly, and we know the difference between a 91766 bungalow with original 1950s ductwork and a Phillips Ranch home built in the 1990s. Owner Jason Trent supervises every major retrofit personally. Call (855) 467-1888 for a free estimate on your Pomona home’s air quality or ventilation project.
Why Stonegate Heating & Air California Is Pomona’s Preferred Air Quality & Ventilation Company
Sixteen years in business, nearly 500 reviews at 4.7 stars, and Jason Trent on the job site. That’s the difference.
We’ve built our reputation across California on owner-supervised work, not dispatch-board roulette. In Pomona specifically, we’ve handled enough evaporative-to-refrigerated conversions that we can walk into a Lincoln Park or Mayfair home and spot the ductwork issues before we pull a tape measure. Our reviews from Pomona customers consistently mention the same thing: the person quoting the job is the same person making sure it’s done right.
Response time to Pomona runs same-day to next-day for standard calls, and we carry parts for Carrier, Trane, Lennox, and American Standard systems so we’re not ordering components from a warehouse two counties away. When monsoon humidity hits in July and your swamp cooler quits, that matters.
Our Air Quality & Ventilation Services in Pomona
Air Filtration for Pomona’s Dust and Pollen Loads
Pomona’s valley location traps particulates from the 10 and 60 freeways, and the Santa Ana winds kick up fine dust from the San Gabriel foothills. Homes with oversized evaporative cooler returns, common in 91766 and 91767, pull that dirty air through gaps in poorly sealed filter racks. We size filtration to your actual duct system, not the nominal size stamped on the old grille. A 1-inch pleated filter choked into a 20×20 swamp-cooler return is doing almost nothing. We upgrade to properly sealed 4-inch media cabinets or whole-house electronic air cleaners where the ductwork allows.
ERV and HRV Systems for Pomona’s Tight Retrofit Homes
Energy Recovery Ventilators and Heat Recovery Ventilators are the right tool for Pomona homes that have been sealed up during AC retrofits but now lack fresh air. Older central-Pomona bungalows were never built tight, they leaked everywhere, but once you add spray foam and a new split system, the indoor air goes stale fast. An ERV pre-cools and dehumidifies incoming air using exhaust air, which cuts the load on your AC during those 105°F days. We size ERV capacity to the home’s square footage and existing duct layout, critical in Pomona where many systems are already fighting against oversized original ductwork.
Ventilation Installation and Duct Redesign
This is where Pomona’s legacy infrastructure hits hardest. That 20×20 evaporative cooler return drop? It’s killing your new AC’s performance. We redesign supply and return paths to Manual D standards, resize trunk lines, and add proper balancing dampers. In a 1962 ranch near Garey Avenue last spring, we found the homeowner’s “new” system had been installed by another contractor who never touched the original ductwork. The house wouldn’t cool below 80°F. We replaced the return plenum, resized the supply runs, and added a fresh-air intake. Problem solved. Owner Jason Trent was on site for the full day.
Humidifier and Dehumidifier Installation
Pomona’s climate swings both ways. Winter heating in these older homes with minimal insulation drives relative humidity into the teens, cracking woodwork and static-shocking everyone. Summer monsoon pushes dew points to where evaporative coolers stop working and existing ACs sweat. We install steam humidifiers for winter and whole-house dehumidifiers tied to the central system for summer, sized to the actual load, not a rule-of-thumb chart.
UV Air Purifier Installation
Condensate pans in Pomona homes with undersized or poorly sloped ductwork grow biofilm fast. The combination of monsoon humidity and 105°F attic temperatures creates ideal conditions for mold. We mount UV-C lamps at the coil and in the return, spec’d for the actual CFM your system moves, not a generic “up to 3 tons” claim.
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 Pomona
Whatever brand you have, we work on it. Our technicians are factory-trained or field-experienced on Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For Pomona customers, that means we stock common parts locally and don’t waste a day ordering a control board or contactor. From a single-room mini split to a full commercial system, one team handles it.
Common Air Quality & Ventilation Problems We See in Pomona Homes
- Oversized evaporative cooler ductwork killing new AC performance. The original high-CFM, low-static-pressure ductwork in 91766 and 91767 homes causes new split systems to short cycle, freeze coils, and burn out compressors. We see this weekly. The fix is never a bigger AC; it’s proper duct redesign.
- Uninsulated attic ducts sweating onto drywall. Swamp cooler ducts were often run bare in attics. When monsoon humidity hits and those same ducts carry 55°F refrigerated air, condensation drips through ceiling texture. We’ve replaced mold-damaged drywall in homes from Phillips Ranch to west of Garey Avenue.
- The three-system patchwork: dead roof cooler, window unit, portable units. It’s everywhere in central Pomona. The homeowner got priced out of a full conversion years ago and now lives with crimped airflow, no whole-house ventilation, and rooms that never get conditioned. We quote honest retrofit numbers and phase the work when budget’s tight.
- Filter racks that don’t seal, bypassing filtration entirely. On a 1950s home near Lincoln Park, we measured 40% of return air bypassing a 1-inch pleated filter because the old swamp-cooler rack had a half-inch gap on all sides. The coil was black with dust. New sealed media cabinet, problem fixed.
Pricing for Air Quality & Ventilation in Pomona, CA
Honest numbers for Pomona’s market:
| Service | Typical Range in Pomona |
|---|---|
| Air filtration upgrade (media cabinet, sealed rack) | $400–$900 |
| Whole-house dehumidifier install | $1,200–$2,800 |
| Steam humidifier install | $800–$1,800 |
| UV air purifier (coil + single return lamp) | $600–$1,200 |
| ERV/HRV system with duct connections | $2,500–$5,500 |
| Ventilation duct redesign (return resize, rebalance) | $1,500–$4,000 |
What moves the needle: accessibility of attic or crawl space, whether we’re cutting into finished drywall, and how much of the existing ductwork can be salvaged. Homes with original evaporative cooler trunks almost always need more work than a clean-sheet install. We give exact quotes after a site visit, estimates are free, and Jason Trent reviews every Pomona proposal personally. Call (855) 467-1888.
We Also Serve Cities Near Pomona
Our Air Quality & Ventilation team works throughout the Pomona Valley and surrounding foothill communities. We regularly service San Dimas, La Verne, Charter Oak, and Diamond Bar. Same owner-supervised standard, same multi-brand capability, same honest pricing.
Serving Pomona, CA — Our Local Coverage Area
We’re based in the Pomona 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 Pomona
No, not if you want it to work properly. The existing ductwork is sized for high CFM evaporative air, which runs at much lower static pressure than a modern split system needs. Reusing it causes low airflow, short cycling, and premature compressor failure. We redesign the return and rebalance supply runs per Manual D. Call (855) 467-1888 and we’ll measure your system in person, estimates are free.
July brings the North American Monsoon, pushing dew points into the 55–65°F range where evaporative coolers quit entirely and refrigerated systems face their highest latent load. If your AC was marginally sized or has airflow issues from original ductwork, that’s when it fails. The system can’t remove enough moisture to drop temperature. We see this constantly in 91766 and 91767 homes where contractors installed new equipment without addressing legacy ducts. Call us for a load calc and airflow test.
Remove it, properly patch the roof penetration, and use that location for a correctly sized return air plenum if duct routing allows. A dead cooler is a leak path, a roof maintenance liability, and it blocks you from using that prime real estate for ventilation equipment. We’ve converted dozens of these in central Pomona. The roof patch and new return plenum typically runs $800–$1,500 depending on roofing material and attic access.
The physical dimensions matter less than whether the filter rack seals and whether the filter area provides enough face velocity for your system’s CFM. A 20×20 swamp-cooler return with a 1-inch filter might need 4 square feet of filter media to avoid choking the blower. We often upgrade to 4-inch or 5-inch media cabinets with proper gasketing. Don’t guess by the old grille stamp. Call (855) 467-1888 and we’ll measure actual airflow and recommend a sealed solution.
An ERV transfers moisture between incoming and outgoing air streams, so it reduces the humidity load compared to bringing in unconditioned outside air. During monsoon season in Pomona, that can mean 15–25% less latent load on your AC. It’s not a dehumidifier replacement, but paired with right-sized equipment and proper ductwork, it keeps indoor humidity in the 45–55% range without overcooling. We size ERVs to ASHRAE 62.2 standards for your home’s occupancy and square footage.
Written by Jason Trent, Owner and Field Supervisor at Stonegate Heating & Air California, serving Pomona and the inland valley since 2008.