“Powerful purification capabilities designed to safeguard your living spaces.”
"The UltraHEPA filter delivered some of the best filtration results we’ve seen."
2025 Best Purifier for PM2.5 & Gases
Wildfire smoke kills 40,000 Americans every year
Wildfire smoke is a complex mixture of health hazards that travels hundreds (even thousands) of miles and includes:
PM2.5—microscopic particles that penetrate deep into your lungs & enter your bloodstream
Volatile organic compounds (VOCs)—carcinogenic gas-phase chemical compounds like benzene and formaldehyde
Carbon monoxide (CO)—a colorless, odorless gas that reduces critical oxygen delivery to organs and tissues
Toxic residue/heavy metals—lead, arsenic, mercury, etc. released from burning soil, buildings, and more
The good news—AirDoctor’s UltraHEPAⓇ filter is independently tested to capture particles as small as 0.003 microns (tinier than the tiniest smoke particles). And the premium activated carbon filter neutralizes toxic gases.
Breathe pure air at home during wildfire season
Pre-filter
Traps larger particles like dust and pet hair, protecting the other filters and extending their lifespans.
Premium carbon filter
Enhanced with potassium permanganate to neutralize toxic gases and unwelcome odors from wildfire smoke.
UltraHEPA® filter
Captures 99.99% of harmful microscopic particles released during wildfires that have short- and long-term health effects.
Breathe cleaner air in the rooms that matter most. The AirDoctor 3500 is an award-winning, high-performance air purifier built for medium to large spaces.
Circulates 630 sq. ft. 4x/hr for continuous, clean air
UltraHEPA® captures 99.99% of particles as small as 0.003 microns
Dual-action Premium Carbon/VOC filter removes toxic gases, VOCs and odors
$659.00
Sale price $659.00Regular price
Real reviews
The smell of smoke was terrible in my home in the days following the Eaton fire. I ran the air purifier for 2 days and the smell was gone. The quality of your products is unmatched.
- Alicia F.
Verified user
This thing is awesome. It works great and actually works so fast when I cook with cast iron that I don’t set off my sensitive smoke alarms anymore. Couldn’t be happier!
- Abby J.
Verified user
We were struggling with LA wildfire pollutants in the air, feeling sluggish since the fires started. If you care about what you breathe you should get one of these.
Your doctor-recommended prescription for clean air
“Say goodbye to wildfire smoke with AirDoctor.”
— Dr. Jamie Rutland, Pulmonologist
Frequently Asked Questions
Is AirDoctor a good air purifier for wildfire smoke?
Yes, AirDoctor is an advanced air purifier built to help protect you from the dual threats present in wildfire smoke: ultra-fine particles (PM2.5) combined with toxic gases released from burning buildings, cars, trees, soil, etc.
Addressing both threats is critical from a health standpoint, and that's exactly where AirDoctor stands out. It’s the only air purifier equipped with a medical-grade UltraHEPAⓇ filter designed to capture more (and smaller) airborne particles, plus a thick activated carbon filter that removes the toxic gases (like ozone and carbon monoxide) HEPA-only air purifiers miss completely.
UltraHEPA filter: Independently tested to remove 99.99% of airborne particles as small as 0.003 microns—that’s 100x smaller than the HEPA standard.
Premium carbon filter: Activated carbon enhanced with potassium permanganate to not just remove toxic gases from your air, but convert them to stable, non-hazardous by-products.
And all of this happens inside a fully sealed filtration system, so no dirty air escapes back into your room.
Get full-spectrum protection against wildfire smoke. Capture more of the harmful particles floating in your air and relax knowing that AirDoctor has your back when it comes to removing toxic gases too.
How can wildfire smoke harm me?
There is no safe level of exposure to wildfire smoke. Short-term health risks include:
Eye, nose, and throat irritation
Chest pain, shortness of breathAsthma, respiratory inflammation
Coughing, wheezing, difficulty breathing
Emergency room visits, hospitalizations
Decreased cognitive performance, effects on mental health and well-being
And long-term health risks include:
Neurological damage
Increased susceptibility to flu infection
Higher mortality from cardiovascular disease
Increased risk of cancer and premature death
Increased risk of pre-term birth and low birth weight
Increased risk of respiratory disease and reduced lung function
Which AirDoctor is right for me?
It depends on your room size. Basically, the bigger the room, the bigger the AirDoctor.
When deciding, the key numbers to consider are:
The room’s square footage (sq. ft.)
The model’s air changes per hour (ACH)
A Harvard University study* cited by the CDC recommends at least 4 air changes per hour to effectively and efficiently remove allergens (dust, pollen, pet dander, mold spores, etc.) smoke, bacteria, and viruses.
The change filter alert will let you know when it’s time to change a filter, so you’ll never have to guess.
Environmental factors (like how dirty your air is) can affect filter life, but the typical timeframe is:
UltraHEPA® filter: Every 12 months
Carbon/VOC filter: Every 6 months
The pre-filter is reusable. We suggest vacuuming it with a brush attachment once a month.
Where can I buy replacement filters?
When it’s time to replace a filter, make sure you get the real thing! Shop directly on our site at airdoctor.com.
Here’s why: Knockoff generic filters will degrade your AirDoctor’s performance, failing to protect you against serious airborne threats including harmful microscopic particles and toxic gases. Plus, those inferior filters cost more in the long run by decreasing your AirDoctor’s lifespan and voiding your warranty.
What if I need to make a return?
Every product is backed by our 30-day money-back guarantee. Just call our customer service team at 800-221-2515. We’ll issue you a refund for the purchase price (minus shipping & processing).