Fast, Reliable Air Quality & Ventilation Across Los Altos
Air quality and ventilation work in Los Altos runs $800–$4,500 for most installations, with same-day diagnostics available throughout the 94022, 94023, and 94024 ZIP codes. We’re familiar with the split personality of this city’s housing stock: original 1950s ranch homes along Foothill Expressway corridor with attic ducts never meant for cooling, and sleek custom rebuilds near downtown where whisper-quiet, smart-integrated systems are the expectation. Our crews make the drive up from San Diego County regularly, and we prioritize Los Altos calls during heat events when valley-floor temperatures spike 10–15°F above what coastal neighbors experience. Call (844) 875-9451 for a free estimate.
Why Redwood Heating & Air San Diego Is Los Altos’s Preferred Air Quality & Ventilation Company
Gregory Hahn founded this company and still leads every technical decision. That matters in Los Altos, where a ventilation install in a $4 million custom rebuild demands owner-level accountability, not a franchise dispatcher sending whoever’s available.
Our 428 verified reviews averaging 4.6 stars include homeowners from the Los Altos Hills border down to the Mountain View line. They mention the same thing repeatedly: we diagnose right the first time, and we don’t push equipment brands we happen to have in the warehouse. We’re certified to service nine major HVAC brands — Carrier, Trane, Lennox, Bryant, American Standard, and four others — so we match equipment to your home, not the other way around.
Response time to Los Altos typically runs same-day or next-morning for air quality emergencies, especially during Santa Clara Valley heat waves when ERV systems fail and attic ductwork turns into convection ovens. We know the local permit landscape, the Santa Clara County ventilation codes, and the specific headache of integrating modern air quality equipment into post-WWII ranch electrical panels.
Thirteen years in business means we’ve outlasted most local HVAC startups and one-truck operations. From a single mini-split to a full commercial system, we handle the full spectrum.
Our Air Quality & Ventilation Services in Los Altos
ERV/HRV System Installation & Repair
Energy Recovery Ventilators and Heat Recovery Ventilators are essential in Los Altos’s tightly sealed custom homes, where modern building envelopes trap pollutants along with conditioned air. We recently serviced a custom rebuild on a sprawling lot near downtown Los Altos where the homeowner wanted a whisper-quiet, smart-integrated ventilation system for their open-plan great room. Our crew installed a multi-zone Daikin ERV tied into the home’s Control4 system, ensuring balanced fresh air without audible noise, and sealed the attic ducts to prevent the 140°F heat from degrading performance. For original ranch homes, we often recommend ERVs as part of a broader duct-sealing strategy, since the same leaks that waste energy also let in valley dust and pollen.
Ventilation Installation & Duct Modification
New ventilation installs in Los Altos fall into two categories: retrofitting fresh air capability into 1960s ranch attics, and designing zoned systems for teardown-and-rebuild custom homes. The first category is harder. Original attic ductwork in these homes — running along San Antonio Road, Grant Park neighborhoods, and the South Los Altos area — was sized for gas heat only, with minimal insulation and no consideration for cooling static pressure. We treat duct sealing and attic insulation as a prerequisite conversation before quoting any ventilation add-on job. For custom homes, we design around your architect’s specs and your smart-home platform, whether that’s Control4, Crestron, or a simpler Wi-Fi thermostat ecosystem.
Air Filtration Systems
Los Altos sits far enough inland that the Pacific marine layer dissipates before reaching it, unlike coastal Menlo Park or Redwood City. That means more particulate matter, more pollen from the Santa Cruz Mountain foothills, and more valley dust working its way into homes. Whole-home air filtration — MERV 13+ media cabinets or electronic air cleaners — attaches directly to your HVAC return and scrubs every cubic foot of circulated air. We size these for the actual airflow of your system, which in many Los Altos ranch homes means accounting for undersized ducts that restrict volume.
UV Air Purifier Installation
UV-C lamps mounted in the HVAC plenum neutralize mold, bacteria, and viruses that thrive in dark, humid duct environments. In Los Altos, the specific risk is mold growth on cooling coils during summer heat events, when attic temperatures hit 140–150°F outside the duct but create condensation inside it from temperature differential. UV purifiers prevent this biogrowth from circulating through your home. We specify lamp intensity based on your system’s CFM and coil surface area, not a one-size-fits-all approach.
Humidifier & Dehumidifier Installation
Los Altos winters are mild enough — lows rarely below 35°F — that heating demand is modest and winter air dryness is less severe than in colder climates. Summer is the bigger humidity problem. Despite the dry reputation of California summers, valley-floor ranch homes with poor duct insulation can feel sticky when AC systems short-cycle or can’t pull enough moisture out of the air. We install whole-home dehumidifiers tied to your central system, not standalone units that fight your thermostat’s programming.
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 Los Altos
We service your brand. That isn’t a slogan; it’s a technical necessity in a city with Los Altos’s housing diversity. Our technicians are factory-trained or field-experienced across Carrier, Trane, Bryant, American Standard, and five other major lines. We stock common parts for these brands locally, which means faster turnaround on repairs from the Los Altos Hills down to the Sunnyvale border. When we specify new equipment for a custom home, we select based on your performance requirements, noise tolerances, and smart-home integration needs — not on what our warehouse happens to have in stock.
Common Air Quality & Ventilation Problems We See in Los Altos Homes
- Original ductwork built for gas heat only, lacking insulation for cooling loads. Attic cavities on the valley floor hit 140–150°F in summer. When AC or ERV systems are retrofitted onto these ducts without reinsulating or resizing them, cooling efficiency craters and callbacks follow. We see this constantly in the Grant Park and South Los Altos neighborhoods.
- Retrofit AC systems on undersized ducts causing static pressure issues. The blower motor works harder than designed, draws excess amperage, and fails prematurely. Homeowners think they got a bad AC unit; usually, they got a good unit on bad ducts.
- Smart-home integration conflicts with legacy thermostat wiring in ranch homes. Multi-zone ERV or HRV systems need dedicated low-voltage runs that 1960s construction never anticipated. We run new wiring where necessary, not jury-rig adapters that fail in six months.
- Ice buildup on cooling coils from poorly sealed attic ducts. Hot attic air infiltrates the return side, the coil can’t maintain proper temperature, and frost accumulates until airflow chokes completely. The fix is duct sealing, not a bigger AC unit.
Pricing for Air Quality & Ventilation in Los Altos, CA
Most air quality and ventilation installations in Los Altos fall between $800 and $4,500, depending on system type, duct condition, and smart-home integration complexity. Here’s how typical projects break down:
| Service | Typical Range in Los Altos |
|---|---|
| Air Filtration System (media cabinet) | $800–$1,800 |
| UV Air Purifier (coil-mounted) | $600–$1,400 |
| Whole-Home Humidifier | $700–$1,600 |
| Whole-Home Dehumidifier | $1,200–$3,200 |
| ERV/HRV System (basic install) | $2,500–$4,500 |
| Ventilation Duct Modification (ranch retrofit) | $1,500–$3,800 |
| AC Repair | $150–$650 |
| Furnace Repair | $150–$700 |
| AC Installation | $3,500–$7,500 |
| Tune-Up | $80–$200 |
Custom homes with Control4 or Crestron integration run at the higher end. Ranch retrofits requiring full duct sealing and insulation before equipment install also trend upward. We provide upfront, itemized quotes before any work begins. Estimates are free — call (844) 875-9451.
We Also Serve Cities Near Los Altos
Our Air Quality & Ventilation team regularly works in Los Altos Hills (where hillside homes face different ventilation challenges from valley-floor properties), Mountain View, Stanford, and Sunnyvale. Each city has distinct housing stock and climate exposure, and we adjust our recommendations accordingly.
Serving Los Altos, CA — Our Local Coverage Area
We’re based in the Los Altos 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 Los Altos
Start with a duct integrity assessment, not an equipment quote. In Los Altos, original attic ductwork from the 1950s–60s was sized for heating only, runs through cavities that hit 140–150°F in summer, and typically leaks 20–30% of conditioned air. We test static pressure, seal accessible joints with mastic, and recommend insulation upgrades before any AC or ventilation equipment goes in. Skipping this step guarantees callbacks. Call (844) 875-9451 for a free duct assessment.
Daikin and Carrier both make ERV/HRV units with native Control4 and Crestron compatibility, and we’ve had excellent results with both in Los Altos custom builds. Daikin tends to win on noise specs (critical for open-plan great rooms), while Carrier offers broader thermostat ecosystem flexibility. We specify based on your actual smart-home platform and your architect’s CFM requirements, not a default choice. Call (844) 875-9451 to review your plans.
Los Altos’s inland valley position means hotter, longer cooling seasons than coastal Bay cities, which increases condensation on coils and accelerates mold growth that UV lamps are designed to prevent. However, the same 140–150°F attic heat can degrade UV lamp ballasts if they’re not rated for high-ambient installation. We specify commercial-grade housings for Los Altos ranch retrofits, not residential units that fail in two seasons. Call (844) 875-9451 for a lamp inspection or upgrade quote.
Yes, whole-home dehumidifier installation is one of our most common Los Altos requests, especially for ranch homes with poorly insulated attic ducts. When return ducts pull in 140°F attic air, the AC short-cycles and can’t run long enough to dehumidify properly. A dedicated dehumidifier — sized to your square footage and integrated with your thermostat — solves this independent of cooling calls. Typical install runs $1,200–$3,200. Call (844) 875-9451 for an exact quote; estimates are free.
Odd cycling almost always indicates a control integration issue, not an ERV failure. We see this when the ERV’s native controller conflicts with the smart-home hub’s scheduling, or when occupancy sensors trigger ventilation calls that fight the programmed recovery mode. We remap the control logic to prioritize the smart-home schedule while preserving the ERV’s defrost and filter-maintenance safeties. Most reconfigurations take 2–3 hours. Call (844) 875-9451 to book a controls diagnostic.
Written by Gregory Hahn, Owner at Redwood Heating & Air, serving Los Altos and the greater San Diego region since 2011.