The Airdog X8 shows as currently unavailable on Amazon. The X5 and X3 prices were checked on Amazon on October 16, 2026. CADR, noise and power figures come from the older page and the maker, and were not retested. The first-person endorsement was removed.
AirDog purifiers skip the HEPA filter and use washable plates. Here are the models that are still for sale, what they cost and what to know about ozone.
Table of Contents
What Makes AirDog Different
AirDog purifiers do not use a HEPA filter. They charge particles in an ionic field, trap them on metal plates, and send the air through a carbon layer. The plates are washable, and the older page said the main filter lasts about 10 years. That removes the yearly filter bill that comes with HEPA units. The cost is up front: the X5 is $552.00 and the X3 $382.00. Read about air purifiers with washable filters for the trade-offs.
Airdog X8: Extra Large Rooms
The X8 is the largest AirDog. The older page gave it an airflow of 470 CFM for particles and 190 CFM for gases, a 110 watt motor and noise of 22 to 57 dB. At 470 CFM, a 750 square foot room with an 8 foot ceiling gets about five air changes an hour. The Amazon page shows it as currently unavailable as of October 16, 2026, with 12 ratings at 3.4 stars.
Airdog X5: Medium Rooms
The X5 is the mid-size unit. The older page gave it a CADR near 200 and said it fits about 270 square feet at five air changes an hour, or 400 square feet at about three to four. It is loudest on turbo, up to 63 dB. At 200 CFM, a 270 square foot room holds 2,160 cubic feet, so one air change takes about 11 minutes. See what CADR means.
Airdog X3: Small Rooms
The X3 is the small unit. The older page gave it a CADR near 120 CFM, a recommended maximum of 215 square feet, 27 watts of power and noise of 22 to 50 dB. At 120 CFM, five air changes an hour fits about 180 square feet. The older page also said an outside test found it caught 99.7 percent of particles down to 0.3 microns, below the maker claim.
Looking ahead, washable-plate purifiers like the AirDog are a small, loyal niche. The Airdog X8 shows as currently unavailable on Amazon, with only 12 ratings at 3.4 stars, while the X5 is $552.00 and the X3 $382.00. The catch is that these prices are high for units with fewer ratings than a typical HEPA tower.
4 Air Purifiers to Compare with AirDog
Prices and ratings were checked on Amazon on October 16, 2026.
Price on Amazon: $552.00 | 4.4 stars from 237 ratings (checked October 16, 2026)
The Airdog X5 uses an ionic wind method with washable plates and a pre-filter, and the listing says up to 1,614 square feet. It has a 4.4 rating from 237 ratings.
Price on Amazon: $382.00 | 4.0 stars from 69 ratings (checked October 16, 2026)
The Airdog X3 is the small-room unit with the same washable-plate design, and a 4.0 rating from 69 ratings.
Price on Amazon: $179.99 | 4.6 stars from 32,435 ratings (checked October 16, 2026)
The Winix 5510 is listed for up to 1,881 square feet in one hour with true HEPA, a carbon filter and app support. It has a 4.6 rating from over 32,000 ratings.
Price on Amazon: $229.99 | 4.6 stars from 29,229 ratings (checked October 16, 2026)
The Coway Mighty AP-1512HH is listed for up to 1,748 square feet with an air quality monitor, auto and eco modes and a 3-year warranty. It has a 4.6 rating from over 29,000 ratings.
The risk to watch is ozone. AirDog uses an ionic method, and ionic purifiers can make ozone. The older page quoted an emission of 0.0467 ppm for the X5, which is close to the 0.050 ppm cap that California sets for air cleaners, and then called it safe. A ratings gap matters here too: the X3 has a 4.0 rating from 69 ratings. Expect more ionic units sold as filter-free. Check certification, clean the plates on schedule and keep the unit away from the bed.
Do AirDog Purifiers Make Ozone?
The maker says the units are CARB certified. California caps ozone from air cleaners at 0.050 ppm, and the older page quoted 0.0467 ppm for the X5, which is under the cap but close. Any ionic unit can make some ozone, so run it in a room with air flow and keep it off at night in a bedroom.
How to Clean an AirDog
- Unplug the unit.
- Open the back panel and pull out the ionization wire frame and the collecting plates.
- Take off the protective rubber sleeve.
- Wash the plates and the wire frame as the manual says, and wipe the rubber notches with a damp cloth.
- Vacuum or rinse the pre-filter.
- Let everything dry fully before reassembling.
The older page advised a full clean every 6 to 12 months.
Cost Compared with HEPA
The X5 at $552.00 costs about $322 more than a Coway Mighty at $229.99. A HEPA filter set costs about $60 a year, so the filter bill would catch up after about five years, so the AirDog only pays back for owners who plan to keep it. Use the air purifier filter replacement cost guide to compare. For more big-room picks, see air purifiers for large rooms.
FAQ
Is the Airdog X8 still sold on Amazon?
It shows as currently unavailable as of October 16, 2026.
Do AirDog purifiers make ozone?
They are ionic units, which can make some ozone. The maker says they are CARB certified.
Do AirDog purifiers need filters?
No HEPA filter. The plates are washable, and the older page said the main filter lasts about 10 years.
How big a room does the Airdog X5 clean?
About 270 square feet at five air changes an hour, from a CADR near 200.
Final Word
The AirDog X5 and X3 save on filters but cost a lot up front and carry an ozone question. A Winix 5510 or a Coway Mighty is the simpler buy for most homes.
What happens next: the X8 may return, but the X5 and X3 are the models to look at today. For buyers who want a plain HEPA, a Winix 5510 costs about a third as much as the X5.
Related Guides
Keep going with what CADR means, air purifiers with washable filters, air purifier filter replacement cost guide, AirDoctor vs Coway and air purifiers for large rooms.
