Same-Day Service
Most service calls handled same-day across Spokane and Coeur d'Alene.
Duct Cleaning
Real duct cleaning — not a $99 vacuum-and-go.
A proper duct cleaning isn’t a guy with a shop vac. It’s a NADCA-method process: physical containment, mechanical agitation inside the duct, and a truck-mounted negative-pressure HEPA vacuum pulling debris out of the entire system at once. Done right, it takes 3–5 hours and produces a measurable difference. Done wrong, it’s worse than nothing — it can dislodge debris that ends up in your living space.
We’re upfront about something most companies aren’t: most homes don’t need duct cleaning. The EPA’s published position is that it’s warranted when there’s visible mold, vermin infestation, or significant dust release from registers — not as routine maintenance. We’ll inspect with a camera first and tell you honestly whether you’ll benefit. When you will, we do it right.
- NADCA-method Industry-standard cleaning protocol — not a 30-minute filter swap with a vacuum hose.
- Truck-mounted vacuum Negative-pressure HEPA system pulls debris out of the entire duct run at once.
- Honest assessment We'll tell you if cleaning won't help — and what will.
- Before & after proof Camera-documented before and after photos delivered with the final report.
When Cleaning Helps
Signs your ducts actually need cleaning
Most "dusty house" complaints have other causes — leaky returns, missing filters, or duct disconnects. These are the symptoms where duct cleaning genuinely helps:
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Visible mold in the ducts
Mold growth on duct interior, the coil, or the air handler — EPA's #1 reason for cleaning.
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Vermin or insect infestation
Rodent nests, droppings, or insect debris in the ductwork — a clear health concern.
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Visible dust at registers
Significant dust release when the system starts — points to real buildup, not just normal household dust.
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Post-wildfire smoke residue
Inland Northwest wildfire seasons leave PM2.5 residue in ducts — best removed before heating season.
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After major renovation
Drywall dust, sawdust, and demo debris accumulate in supply and return ducts during construction.
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New homeowner / unknown history
Buying a home? You don't know what's in the ducts. A camera inspection is the right first step.
What We Clean
Every part of the system, every time
NADCA standards require cleaning the entire system — not just the visible registers. Here's what that actually means.
- Supply trunk & branches Mechanical agitation + HEPA vacuum on every supply run, branch, and boot.
- Return trunk & branches Returns are usually dirtier than supplies — leaks pull unfiltered air from attics and crawls.
- Registers & grilles Pulled, washed, and reinstalled — not just brushed in place.
- Blower compartment Blower wheel, motor housing, and surrounding sheet metal cleaned and HEPA-vacuumed.
- Evaporator coil Coil cleaning when accessible — restores cooling efficiency and stops mold growth at the source.
- Plenum & air handler The boxes upstream and downstream of the furnace — where dust collects worst.
- Optional sanitization EPA-registered sanitizer applied after cleaning when mold or odor warrants it.
- Dryer vent cleaning Add-on service to clear lint buildup that's a top cause of home fires.
How It Works
Our duct cleaning process
Containment first, cleaning second, proof third. Typically 3–5 hours start to finish.
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Camera inspection
We look first. If cleaning won't help, we tell you — no charge for the honest answer.
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Protect & contain
Drop cloths, corner protection, register sealing — your home stays clean.
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Negative pressure
Truck-mounted HEPA vacuum hooked to the main trunk. We agitate and vacuum every run.
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After photos & report
Same camera, same access points — you see exactly what changed before we leave.
Current Specials
Save on the work your home needs most.
Why Choose Mainstream
Upfront Pricing
Flat-rate pricing approved before work begins — no surprises on the invoice.
Licensed & Insured
Fully licensed in Washington and Idaho, bonded, and insured for your protection.
Satisfaction Guaranteed
If it isn't right, we make it right. Period.
Curious if your ducts need cleaning? We'll inspect honestly.
Same-day service across Spokane & Coeur d'Alene — flat-rate pricing, no surprises.
What Our Customers Say
Don't just take our word for it — hear from our satisfied customers
★★★★★
Ricky Saldana the technician that came out was fantastic. He was so knowledgeable about my plumbing issues and his recommendations were spot on. He was on time and very pleasant to work with. I would highly recommend him for any plumbing work that needs to be done.
Thanks Ricky for all of your input.
★★★★★
Jake was on time and very good about looking at my furnace. I appreciate all his help. I reccomend him and mainstream electric very highly. thank you Sharon Scott
Maintenance Membership
Join the Care Club
Total home service care, on a schedule.
Members get priority scheduling, seasonal HVAC tune-ups, an annual plumbing & electrical safety inspection, and exclusive discounts — for less than the cost of a single emergency call.
- Priority scheduling
- Seasonal HVAC tune-ups
- Annual safety inspection
- Exclusive member discounts
- Free dispatch on repairs
- No long-term contracts
Duct Cleaning — Frequently Asked Questions
How often should I have my ducts cleaned?
For most homes, only when a problem warrants it — visible mold, vermin, significant dust release, post-renovation, or after a wildfire-smoke season. The EPA does not recommend routine cleaning on a schedule. If you have pets, allergies, or smokers in the home, the timeline shortens; we’ll give you an honest recommendation after the camera inspection.
How long does duct cleaning take?
A typical 3-bedroom home takes 3–5 hours from setup to teardown. Larger homes or systems with more supply and return runs can take a full day. We confirm the time window when we schedule, and we’ll text you a tech photo and live ETA the morning of.
Will it actually improve my indoor air quality?
If the ducts are genuinely dirty, yes — measurably. If your symptoms are caused by something else (leaky returns, missing or wrong-sized filter, blower buildup, humidity), cleaning the ducts alone won’t fix it. We diagnose the root cause first so the money you spend actually solves the problem.
What's the difference between a $99 service and yours?
Equipment, mostly. A truck-mounted negative-pressure HEPA vacuum is in a different league than a portable system or a shop vac. NADCA standards also require physical access to every duct run — which means pulling registers and using mechanical agitation, not just running a hose down a trunk. We’re upfront on price because we do the work that produces results.
Will it lower my energy bill?
Sometimes. If significant buildup is restricting airflow, cleaning restores it and the system runs less. But the bigger wins on energy bills are duct sealing (10–20% reduction is realistic) and proper tune-ups. We’ll measure static pressure before and after so any improvement is documented.
Do you clean dryer vents too?
Yes. Dryer vent cleaning is a separate add-on service — and a smart one. Clogged dryer vents are a leading cause of home fires and dramatically reduce dryer efficiency. Most homes should have it done every 1–2 years.
Is the work warrantied?
Every duct cleaning includes our Home Comfort Guarantee. If you don’t see and feel a difference, we come back and make it right. Care Club members get a discount on dryer vent service and priority scheduling.
*Offers cannot be combined with other promotions or applied to dispatch fees. No cash value. Must present offer at time of service. Call for details.
