Indoor Air Quality Services in Greater Seattle
Breathe easier with professional indoor air quality services for your home. Cardinal Heating & Air delivers tailored solutions from filtration to humidity control. Serving the Greater Seattle area, including Seattle, Bellevue, and Everett. Our licensed technicians are trained on top brands and backed by a 4.7 rating from 445 reviews. Since 1991, we’ve focused on safe, healthy air and transparent recommendations. Request your assessment today and ask about current IAQ specials.
Special Offers & Promotions
$240 Indoor Air Quality Assessment + Same Day Service
- Same Day Service
Dehumidifier Install For As Low As $50/Mo + Free Proposal + Same Day Service
- Free Proposal
- Same Day Service
$240 Whole-Home Humidifier Repair Diagnostic + Same Day Service
- Same Day Service
$240 Whole-Home Dehumidifier Repair Diagnostic + Same Day Service. We will come to your home, diagnose the problem with your dehumidifier, provide a comprehensive report and present personalized solutions.
- Diagnostic; Same Day Service
Humidifier Install For As Low As $50/Mo + Free Proposal + Same Day Service. We will come to your home, analyze your new whole-home humidifier installation needs, present personalized solutions. Financing Options Available!
- Free Proposal; Same Day Service; Financing Available
Why Choose Us
What Our Customers Say
"He cleaned the air conditioning unit that has never been cleaned before."
"Removing it freed up the airflow and solved one of the issues."
"He gave us a detailed report complete with future recommendations."
Answers to Common Questions
View All FAQsHow much does whole-house humidifier installation typically cost?
Whole-house humidifier installation cost is confirmed after an in-home evaluation, and Cardinal Heating & Air offers installs for as low as $50 per month with financing. Most pricing comes down to the equipment type and the condition of your current HVAC setup. A technician will assess your system, confirm sizing, and outline the scope before work begins. Our team frequently installs these systems in the Bellevue area.
Key factors that change total installed price:
- Humidifier style and capacity required for the home
- Access to ductwork and need for plumbing or electrical connections
- Thermostat or control upgrades requested
- Any remediation or cleaning needed at the install location
Schedule a home visit to receive a firm quote and ensure the unit is correctly matched to your system. <br/> Updated: 2026-03-11 <br/> Need help in Bellevue, WA? Call (425) 827-9997 or book online. "Brandon was so thorough! We'd like to have him do our annual cleaning / inspection next year!" — Michael W.
[0] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnTURndmJqWUd3EAE!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CIHM0ogKEICAgMDgvbjYGw%7CCgsIufj9vQYQ6MLUFQ%7C?hl=en-GB[1] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNYdF9EMWJ3EAE!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CIHM0ogKEICAgICXt_D1bw%7CCgsIsp7auAYQiI6YXA%7C?hl=en-GB[2] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnTURRdTZidjNRRRAB!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CIHM0ogKEICAgMDQu6bv3QE%7CCgwI6a_RvgYQ8N6euwM%7C?hl=en-GB[3] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2tSMlNrSkNNR0prU0ZaVExYUkhRVWhNTlhOSVMyYxAB!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CAIQACodChtycF9oOkR2SkJCMGJkSFZTLXRHQUhMNXNIS2c%7C0d8ZgYu8CtD%7C[4] https://cardinalheating.com/our-services/heating/radiant-floor-heating/[5] http://cardinalheating.com/special-offers/[6] https://cardinalheating.com/hvac-services/heating-maintenance/[7] https://cardinalheating.com/hvac-services/smart-thermostat-installation/[8] https://cardinalheating.com/our-services/services/planned-maintenance-program/[9] https://cardinalheating.com/our-services/air-conditioning/[10] https://cardinalheating.com/[11] https://cardinalheating.com/what-to-know-about-the-r-410a-refrigerant-phaseout/How much does professional air duct cleaning service cost?
There isn’t a one-size price for professional air duct cleaning. Final cost depends on home size, number of supply/return vents, duct length and access, and how much dust or microbial buildup we find. A technician confirms pricing after an on-site inspection. Many homeowners start with our $79 Indoor Air Quality Assessment for a same-day visit and a comprehensive report of findings, including duct conditions and next-step options (webpages, coupons). We serve Kirkland, Seattle, and nearby.
<br/> Updated: 2025-11-26 00:00:00 <br/>Need help in Kirkland, WA? Call (425) 827-9997 or book online.
[0] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnTURna1BiUW1BRRAB!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CIHM0ogKEICAgMDgkPbQmAE%7CCgsI7djkvQYQoNjOMw%7C?hl=en-GB[1] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUQ3LXFMZkxnEAE!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CIHM0ogKEICAgID7-qLfLg%7CCgwI4YbTtgYQkJLhhwM%7C?hl=en-US[2] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnTUNBNUtyeGlnRRAB!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CIHM0ogKEICAgMCA5KrxigE%7CCgwIuODpvAYQ4O-TyAE%7C?hl=en-GB[3] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnTURJNnJlT3V3RRAB!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CIHM0ogKEICAgMDI6reOuwE%7CCgwIxO3WvwYQsPTnyQE%7C?hl=en[4] https://cardinalheating.com/hvac-services/mini-split-repair/[5] https://cardinalheating.com/hvac-services/heat-pump-maintenance/[6] https://cardinalheating.com/hvac-services/mini-split-installation/[7] https://cardinalheating.com/hvac-services/geothermal-system-repair/[8] https://cardinalheating.com/wp-json/oembed/1.0/embed?url=https%3A%2F%2Fcardinalheating.com%2Four-services%2Fservices%2Findoor-air-quality%2F&format=xml[9] https://cardinalheating.com/products/[10] https://cardinalheating.com/our-services/air-conditioning/[11] https://cardinalheating.com/cities-served/bothell-wa/How much does it cost to install UV lights in HVAC systems?
The cost to install UV lights in an HVAC system with Cardinal Heating & Air is determined after an on-site assessment because it depends on your equipment and installation access. The biggest driver is the UV setup you choose (coil-only, supply-duct, or dual-lamp) and where it mounts in your system.
We install UV air purifiers for many homes in the Seattle area and can integrate them with your existing filtration or humidification plan. Financing options are available for installations.
- Key cost factors we confirm on site:
- Number of lamps and whether a dual-lamp kit is needed
- Electrical availability or the need to add a nearby power source
- Brand and features (bulb life, indicator, safety interlock)
- Access limits around the coil or duct that affect labor time
Schedule an indoor air quality assessment to size the right UV solution and get a firm quote before any work begins. <br/> Updated: 2026-04-01 <br/> Need help in Seattle, WA? Call (425) 827-9997 or book online.
[0] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21GVWMzUTFNR1UxT0dKQlVteEdUblpoZDNCUlJWRRAB!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CAIQACodChtycF9oOmFUc3Q1MGU1OGJBUmxGTnZhd3BRRVE%7C0dMiApNs-yG%7C[1] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25GSldFZDRZVWx6UkcxbmFXZHBRbFJFTFdsaFNtYxAB!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CAIQACodChtycF9oOnFJWEd4YUlzRG1naWdpQlRELWlhSmc%7C0ct6UlWbsLk%7C[2] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUMzNDdfRW9nRRAB!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CIHM0ogKEICAgIC347_EogE%7CCgwI_cDpwAYQ6Kyw1QI%7C[3] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnTURndmJqWUd3EAE!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CIHM0ogKEICAgMDgvbjYGw%7CCgsIufj9vQYQ6MLUFQ%7C?hl=en-GB[4] https://cardinalheating.com/hvac-services/boiler-repair/[5] https://cardinalheating.com/hvac-services/geothermal-system-installation/[6] https://cardinalheating.com/hvac-services/furnace-repair/[7] https://cardinalheating.com/hvac-services/smart-thermostat-installation/[8] https://cardinalheating.com/our-services/services/planned-maintenance-program/[9] https://cardinalheating.com/our-services/air-conditioning/[10] https://cardinalheating.com/[11] https://cardinalheating.com/cities-served/shoreline-wa/- Key cost factors we confirm on site:
How much does it cost to install UV light in an HVAC system?
The cost to install a UV light in your HVAC system varies by home and equipment choice. We confirm pricing after an on-site Indoor Air Quality assessment. Cardinal Heating & Air installs whole-home UV air purifiers and provides same-day service in areas like Kirkland and Seattle. You can start with our $79 Indoor Air Quality Assessment, which includes a comprehensive report.
Quick steps:
- We assess your system on site.
- We present UV options that fit your HVAC.
- A technician confirms final costs before work begins.
Need help in Kirkland, WA? Call (425) 827-9997 or book online.
[0] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUMtaGVfbDhRRRAB!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CIHM0ogKEICAgIC-he_l8QE%7CCgwIj4yqmwYQ0MKMmgI%7C?hl=en-US[1] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnTUNvNWZDLTR3RRAB!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CIHM0ogKEICAgMCo5fC-4wE%7CCgwIv7CKwAYQkLS9sQE%7C[2] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnTUNZaklENlRnEAE!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CIHM0ogKEICAgMCYjID6Tg%7CCgwI2JbQwAYQqJmZzQE%7C[3] https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSURudEtmUHFnRRAB!2m1!1s0x0:0xb5ecea2f984b9263!3m1!1s2@1:CIHM0ogKEICAgIDntKfPqgE%7CCgwI1vv6twYQkMuqmQE%7C?hl=en-GB[4] https://cardinalheating.com/hvac-services/furnace-maintenance/[5] https://cardinalheating.com/hvac-services/humidifier-repair/[6] https://cardinalheating.com/hvac-services/geothermal-system-repair/[7] https://cardinalheating.com/hvac-services/heat-pump-maintenance/[8] https://cardinalheating.com/wp-json/oembed/1.0/embed?url=https%3A%2F%2Fcardinalheating.com%2Four-services%2Fservices%2Findoor-air-quality%2F&format=xml[9] https://cardinalheating.com/our-services/air-conditioning/[10] https://cardinalheating.com/cities-served/bothell-wa/[11] https://cardinalheating.com/cities-served/shoreline-wa/
Helpful Tips & Maintenance Advice
View All BlogsTop Tips for Efficient Water Heater Use During Seattle's Summer
Estimated Read Time: 2 minutes
Seattle's summers may be mild compared to other regions, but efficient water heater use remains essential for both comfort and cost savings. Here’s how you can optimize your water heater use during these temperate months.
The Importance of Efficiency
Water heat...
Bellevue, WA Indoor Air Quality: Air Purifier & UV Repair
Estimated Read Time: 12 minutes
If your air purifier not working has you breathing stale or dusty air, start here. This UV bulb repair guide shows you how to diagnose common issues, replace a UV-C lamp safely, and know when to call a pro. Many whole-home systems live in tight spaces and tie into ...
Seattle HVAC: Whole-House Humidifier Installation Cost Guide
Estimated Read Time: 12 minutes
Dry air makes winter feel harsher, causes static shocks, and can irritate sinuses. A whole-house humidifier solves the problem by balancing moisture through your ductwork. In this guide, we break down whole-house humidifier installation costs, what actually drives ...
Service Areas We Cover
What areas do you serve for indoor air quality services?
We serve the Greater Seattle Area, including Seattle, Bellevue, and Everett. See the full list of cities we visit below, and contact us if you don’t see yours.