Fast, Reliable Air Quality & Ventilation Across Sunnyvale
Air quality and ventilation work in Sunnyvale runs into a wall that newer cities don’t face: fifty-year-old fiberglass duct board baking in attics across 94086, 94087, and 94085. We’re Crestview Heating & Air California, and our Air Quality & Ventilation team handles these exact retrofits weekly. From the ranch homes near Fair Oaks Park to the condos going up downtown, we know which systems can be sealed and which need full replacement before any permit closes. If your home was built between 1952 and 1978 and you’re noticing dust, mustiness, or wildfire smoke creeping indoors, call us at (844) 560-6978. We’ll assess your ductwork and give you a free, upfront estimate.
Why Crestview Heating & Air California Is Sunnyvale’s Preferred Air Quality & Ventilation Company
We’ve been serving the South Bay for nearly two decades, and Sunnyvale’s vintage housing stock keeps us busy year-round. Our 4.8-star average across 250+ customer reviews includes plenty from homeowners in the 94086 and 94087 ZIP codes who needed duct sealing or air filtration retrofits in homes that were never designed for modern HVAC demands.
Marcus Feldman, our owner, still works as Service Manager on jobs in the field. That means when we quote a duct replacement on a 1960s ranch near El Camino Real, he’s the one verifying static pressure calculations and filtration compatibility — not a dispatcher reading from a script. Owner-managed, not outsourced.
We’re factory-trained on nine major brands, including Trane, Lennox, and Rheem, so we don’t turn away systems just because they’re older or less common. Your system, our specialty.
From emergency calls to commercial buildouts, we cover the full range. But in Sunnyvale specifically, the bulk of our air quality work involves retrofitting modern filtration and ventilation into heating-only duct systems that are well past their intended lifespan.
Our Air Quality & Ventilation Services in Sunnyvale
Air Filtration System Installation
Sunnyvale’s location downwind of wildfire-prone hills means smoke events are increasingly common, and standard 1-inch furnace filters don’t cut it for PM2.5. We install whole-home media cleaners and high-capacity filter cabinets that achieve MERV 13 or better — but only after verifying your blower can handle the static pressure. In 94086’s older ranches, that’s rarely a given. A typical air filtration system installation in Sunnyvale runs $150–$700, depending on whether we need to modify return-air pathways first.
ERV/HRV System Installation
Energy Recovery Ventilators and Heat Recovery Ventilators bring in fresh outdoor air without wasting the energy you’ve already spent conditioning it. In Sunnyvale’s mild climate, an ERV makes particular sense: it moderates both temperature and humidity, which matters when your slab-on-grade home is drawing damp crawlspace air through leaky ducts. We size these systems carefully because oversized ventilation in a leaky house just makes your equipment work harder. ERV or HRV installation in Sunnyvale typically costs $1,500–$3,500.
Duct Sealing & Leakage Testing
Here’s the reality in Sunnyvale: California Title 24 mandates duct leakage testing whenever cooling is added to an existing forced-air system. In the 1950s–1970s tract homes that dominate this city, original fiberglass duct board has been degrading in hot attics for 50+ years. The overwhelming majority fail that test on first inspection. We perform the test, locate leaks with precision, and seal or replace as needed. A duct leakage test runs $150–$400; sealing or replacement is quoted separately based on what we find.
UV Air Purifier Installation
UV-C lamps mounted in your air handler or ductwork neutralize mold, bacteria, and viruses on the coil and in the airstream. In Sunnyvale homes where uninsulated crawlspace ducts have grown microbial contamination, this can be a targeted solution — though we always address the moisture source first. We install UV systems compatible with Lennox, Trane, and Goodman equipment, among others.
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 Sunnyvale
We maintain factory-trained compatibility across nine major brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For Sunnyvale customers, that means we’re not special-ordering parts from a warehouse two counties away. We stock common filtration media, UV lamps, and ERV cores locally, so your job moves faster. Whether you’ve got a 1980s Rheem gas furnace in the Lakewood neighborhood or a newer Lennox system in a downtown 94086 condo, we have the parts and the know-how to service it properly.
Common Air Quality & Ventilation Problems We See in Sunnyvale Homes
- Fiberglass duct board shedding particles into living spaces. After decades in attics that hit 140°F in summer, the resin binding this material breaks down. Homeowners in 94087 report fine dust that never seems to settle — it’s often degraded duct liner circulating through the supply registers.
- Crawlspace moisture drawn into slab-on-grade homes through leaky return plenums. Sunnyvale’s shallow crawlspaces and high water table in some areas create persistent dampness. When returns leak, that humidity hits your blower coil and becomes a mold factory.
- Static pressure spikes from high-MERV filters in undersized return systems. Homeowners buy MERV 13 pleated filters for wildfire protection, but original 1960s duct systems were engineered for minimal airflow resistance. The filter loads up, pressure rises, and blower motors fail prematurely.
- Title 24 test failures blocking AC add-ons. This is the big one in Sunnyvale. You want cooling installed before the next heat dome. Your ducts leak 30% or more. The permit won’t close until it’s fixed. We see this on roughly 8 out of 10 vintage ranch homes.
Pricing for Air Quality & Ventilation in Sunnyvale, CA
We’re upfront about numbers because nobody likes sticker shock after work begins. Here’s what air quality and ventilation work typically runs in Sunnyvale’s market:
| Service | Price Range in Sunnyvale |
|---|---|
| Air Filtration System Installation | $150–$700 |
| ERV/HRV Installation | $1,500–$3,500 |
| Duct Leakage Test | $150–$400 |
Actual cost depends on your home’s specific conditions: duct accessibility in the attic or crawlspace, whether we need to enlarge return-air pathways, and if your electrical panel has capacity for added ventilation equipment. We recently retrofitted a whole-home air filtration system in a 1965 ranch on Heatherstone Way near Fair Oaks Park. The original fiberglass duct board had degraded so badly that our crew had to replace it with galvanized steel and install a Carrier Media Air Cleaner to achieve the MERV 13 filtration the homeowners wanted for wildfire smoke protection. Jobs like that land at the higher end because duct replacement was unavoidable. Call (844) 560-6978 for a free estimate — we’ll inspect your system and give you an exact number before any work starts.
We Also Serve Cities Near Sunnyvale
Our service area covers the full South Bay corridor. We regularly handle air quality and ventilation jobs in Mountain View along the 85 corridor, Santa Clara near the central expressway, Cupertino‘s hillside homes with their own duct challenges, and Los Altos where larger lots mean longer duct runs and different static pressure concerns. If you’re in any of these communities and dealing with aging ductwork or wildfire smoke infiltration, we can help.
Serving Sunnyvale, CA — Our Local Coverage Area
We’re based in the Sunnyvale 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 Sunnyvale
California Title 24 mandates duct leakage testing whenever cooling is added to an existing forced-air system, and Sunnyvale’s vintage ranch homes almost always fail on first inspection due to degraded fiberglass duct board. The test requires pressurizing your duct system and measuring leakage percentage; most 1960s-era homes leak 25–40% or more. You’ll need sealing or replacement before the permit can close. Call (844) 560-6978 and we’ll test your system during a free estimate.
An ERV is usually the better choice for Sunnyvale because it transfers both heat and moisture, moderating the humidity that comes with mild Bay Area winters and dry summer spells. HRVs only transfer heat, which makes them less versatile here. The real question is whether your home’s envelope is tight enough to benefit; leaky vintage ranches often need duct sealing first. We can evaluate both during a site visit.
MERV 13 is the minimum for effective PM2.5 capture, but your system must handle the static pressure. Many Sunnyvale ranch homes with original ductwork can’t. We often install dedicated media air cleaners with larger surface area, which achieve MERV 13+ without choking airflow. A standalone upgrade typically runs $150–$700 depending on modifications needed.
Yes, if the air handler or ductwork has adequate mounting space and electrical access. We install UV lamps in the supply plenum or above the evaporator coil. On very old Goodman or Rheem systems, we sometimes need to fabricate custom mounting brackets. The lamp itself draws minimal power, but we verify your control board can handle the added relay.
If they’re original to a 1950s–1970s home, almost certainly yes. Degraded fiberglass board releases respirable fibers and fails leakage tests. We replace with galvanized steel or properly insulated flex duct, which eliminates particle shedding and gives you a sealed system that can support modern filtration. Replacement cost depends on linear footage and attic accessibility; we’ll measure and quote exactly during our free estimate. Call (844) 560-6978 to schedule.
Written by Marcus Feldman, Owner and Service Manager at Crestview Heating & Air California, serving Sunnyvale and the South Bay since 2006.