Dust, odors, and stale air aren’t just annoying, they’re a sign your system isn’t doing its full job. We test your home’s air and fix the actual cause, not just mask it with a candle.
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Vents and furniture collect a visible layer again just days after cleaning.
Bedrooms feel stale or stuffy with the door closed, especially overnight.
Cooking, pet, or musty odors linger no matter how much you clean or spray.
Sneezing, congestion, or itchy eyes that ease up the moment you leave the house.
Windows fog up, or rooms feel damp even with the AC running.
A basement, closet, or bathroom smell that keeps coming back.
One person gets sick and it moves through the whole household within days.
Tightly sealed, energy-efficient homes with no dedicated fresh-air system.
Most air quality problems aren’t visible. Here’s what’s usually behind them.
Sealed-up homes trap stale air and CO2 inside with nowhere to go.
Standard filters stop dust bunnies, not the fine particles that trigger allergies.
Your system circulates air through the whole house, including whatever’s living in it.
Too wet invites mold. Too dry cracks skin, sinuses, and wood floors.
Paint, cleaners, and new furniture off-gas into air that has nowhere to escape.
Gaps pull unfiltered attic or crawlspace air straight into your living space.
Some rooms stay comfortable. Others barely get conditioned air at all.
Efficient, sealed homes need active air exchange, or nothing gets out.
Every AC repair starts with a full diagnostic, not a guess. Here’s what happens when we show up.
01
Full home airflow check
We check supply and return airflow room by room to spot weak spots and imbalances.
02
Air quality testing
We measure humidity, ventilation, and filtration performance against what your home actually needs.
03
Clear explanation before any work
You’ll know exactly what’s affecting your air and why, in plain language, before we recommend anything.
04
Solution matched to your system
We recommend equipment that fits your ducted or ductless setup, not a one-size-fits-all package.
05
Walkthrough after install
We show you what changed, how to maintain it, and what to expect going forward.
No one-size-fits-all air purifier. We match the solution to what’s actually in your air.
AERUS AIR SCRUBBER
Solves: low-grade filtration, VOCs & chemical odors, airborne bacteria
Installs into your ductwork and treats the air as it moves through your system, not just what passes through a filter. Breaks down odors, VOCs, and fine particles standard filters miss. Works alongside ducted systems; ductless homes need a compatible air handler setup, we’ll confirm on assessment.
BROAN ENERGY RECOVERY VENTILATOR (ERV)
Solves: poor ventilation, no dedicated fresh air source, unbalanced airflow
Swaps stale indoor air for fresh outdoor air automatically, without spiking your heating or cooling bill. Built for newer, tightly sealed homes that trap stale air and CO2 with no way out. ENERGY STAR certified. Works with both ducted and ductless setups.
SOLACEAIR UVC GERMICIDAL SYSTEM
Solves: airborne bacteria & mold, humidity imbalance side effects, lingering odors
Installs into your ductwork with two UVC lamps: one neutralizes bacteria, viruses, and mold spores, the other targets odor-causing gases. Runs quietly in the background with no daily maintenance. Best for ducted systems; ask us about standalone options for mini-split homes.
START WITH FILTRATION & FRESH AIR IF:
ADD GERMICIDAL UVC IF:
We’ll always tell you what’s actually needed, not what’s most expensive. Most homes start with filtration and ventilation. UVC gets added when there’s a biological or odor issue filtration alone won’t fix.
DIAGNOSE
1. Airflow test, room by room — Confirm supply and return airflow match what each room needs.
2. Humidity and moisture check — Measure indoor humidity against healthy ranges for your home.
3. Ventilation rate check — Test how much fresh outdoor air is actually reaching your living space.
4. Filtration performance check — Evaluate your current filter’s MERV rating against what your home needs.
5. Duct inspection — Check for leaks pulling unfiltered attic or crawlspace air into your ducts.
6. Odor and source walkthrough — Walk the home to identify where smells or damp spots originate.
DECIDE
7. Root cause identified — We pinpoint what’s actually driving the issue, not just the symptom.
8. Upfront recommendation and quote — You approve the plan and cost before anything is installed.
REPAIR
9. Equipment installed — Air scrubber, ERV, UVC system, or a combination, matched to your system.
10. Post-install verification — We re-test airflow and air quality to confirm the fix worked.
11. Walkthrough — We explain what changed, what maintenance looks like, and what to expect.
Costs vary because homes vary. Here’s what actually moves the number.
IAQ pricing depends on what your home needs, not a flat rate. A quote that skips straight to a number without testing your air first isn’t one you can trust.
More wildfire smoke, more sealed homes, more reasons to take indoor air seriously throughout our Greater Seattle communities.
Air quality in the Puget Sound region has gotten worse over the last decade, not better. Local air quality monitors have recorded the highest fine particle pollution levels on record since tracking began in 1980, and the shift traces back to 2015.Since 2015, the region has faced unprecedented wildfire smoke, with the highest fine particle levels recorded since monitoring began in 1980. That’s on top of what’s already coming from inside your own house.
PSE Trade Ally: Utility-verified contractor for Puget Sound Energy customers
Kicking Gas Partner: Helping Snohomish County homeowners access electrification subsidies
Free HVAC support for local nonprofits, including:
Most IAQ companies assume you have ductwork. We’re Mitsubishi-trained and fit solutions to mini-split homes too.
No guessing what’s wrong with your air. We measure it, then recommend equipment that matches what we find.
No bundled system that’s overkill for your house. You get what your air quality test actually shows you need.
We’ve seen wildfire seasons get longer and homes get tighter. This isn’t theoretical for us, it’s what we work in every day.
The only downside of using Cascadia Comfort? You wish they just be the one that handle all sorts of work other than HVAC because they define what a fantastic service should be. They extremely responsive with communication, doesn't have any shady practice of charging you insane amount of visit fee that doesn't go towards the actual repair, reasonable pricing, and excellent use of technology to let you know who's coming and when are they coming for repair. The technician was extremely friendly and knowledge. He let me shadow him and explain every steps to me. I wish they can also be my landscaper, home repair, car repair....Posted on Google![]()
Tai chen (twnori)
Fast efficient knowledgeable and courteous service. Much appreciated!Posted on Google![]()
Travis Groves
Riley detailed the furnace/heat pump service and options for air filter replacement.Posted on Google![]()
bill fields
Great experience, very knowledgeable and helpful, will use again for HVAC needs.Posted on Google![]()
Siuda75
The folks from Cascadia were prompt, professional, and courteous. In addition to installing my heat pump, Regis made clear how it would operate and what I should do if I had any problems.Posted on Google![]()
Julie Titone
Cascadia did a fantastic job replacing our furnace and installing a new heat pump for our home. Regis was super knowledgeable and pleasant to work with. Highly recommended!Posted on Google![]()
Sam Ma
Nice company to work with. They were a low pressure high service install for our heat and AC. They answered all our questions, did the install in one day, and all worked well.Posted on Google![]()
Dan Haslam
Cascadia is a pleasure to work with and has very good and reasonable pricing. Riley, the technician who came out to service our furnace, AC, and heat pump systems, was a delight and extremely knowledgeable and helpful. I will definitely stick with Cascadia for all my HVAC needs long term.Posted on Google![]()
Leslie DeGasparis
I am very pleased with Cascadia Comfort. Cascadia is responsive, professional, and fair in their pricing. They don't cut corners in their work or try to sell you on any unnecessary services or upgrades.Posted on Google![]()
John Folkestad
HEATING
Furnace, heat pump, and mini-split heating service across the greater Seattle area.
ELECTRICAL
Panel upgrades, wiring, and electrical work to support your HVAC and IAQ equipment.
Common signs include dust that builds back fast, musty or lingering odors, allergy symptoms that ease up when you leave the house, and rooms that feel stuffy even with the HVAC running. The only way to know for sure is a real air quality test, not a guess.
No. Some solutions, like duct-mounted air scrubbers and UVC systems, do require ductwork. Others, like ventilation upgrades, can work with ductless mini-split systems. We evaluate your specific setup before recommending anything.
Yes, filtration and ventilation upgrades both help reduce indoor smoke particles during wildfire season, which has become a regular part of Pacific Northwest summers in recent years. The right solution depends on how your home is currently set up.
An air scrubber targets particles, VOCs, and odors. An ERV brings in fresh outdoor air without spiking your energy bill. A UVC system targets bacteria, viruses, and mold spores. Most homes only need one or two of these, not all three.
Yes. We serve the greater Seattle area including Mill Creek, Lynnwood, Bothell, Everett, and the surrounding communities between Seattle and Lake Stevens.
Newer homes are built tighter and more energy-efficient, which is good for your energy bill but bad for airflow. Without a dedicated fresh air system, stale air and humidity can build up with nowhere to go.
It depends on what your home actually needs. Costs vary based on your system type, ductwork condition, and whether you need filtration, ventilation, germicidal treatment, or a combination. We test first, then quote.
Same-day and next-day appointments available. Schedule an assessment or talk to a real tech now.