The Blueair 7710i family shows as currently unavailable on Amazon, and no Amazon listing for the AirDoctor 5500 could be found. Current prices were checked on Amazon on October 16, 2026. Figures for size, airflow and filter cost come from the older page and were not retested.
The AirDoctor 5500 and the Blueair HealthProtect 7710i were two big-room towers at the top of the market. Here is how they compare and what you can still buy.
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AirDoctor 5500 vs Blueair HealthProtect 7710i at a Glance
Both are extra-large-room towers. The AirDoctor 5500 is sold through the AirDoctor store, and no Amazon listing for it could be found. The Blueair HealthProtect 7470i, 7710i and 7770i family shows as currently unavailable on Amazon, with 123 ratings at 4.3 stars. That leaves the AD3500 and the Airmega 400S as the Amazon options for a big room.
Design and Size
The AirDoctor 5500 stands about 28.75 inches tall and 16 inches wide and deep, and weighs 33 pounds, with wheels and side handles. The Blueair is about 34 inches tall and 13 inches wide, weighs 43 pounds and has hidden casters. It won a design award in 2021, and it came in two versions: the 7710i with an LED display and the 7770i with an LCD screen.
Functionality and Features
The older page gave the AirDoctor 5500 an airflow of about 560 CFM, six fan speeds, an auto mode with an air quality monitor, a timer up to 24 hours and noise of 30 to 50 dB. At 560 CFM, an 868 square foot room with an 8 foot ceiling holds 6,944 cubic feet, so one air change takes about 12 minutes, or five an hour. A 2,170 square foot room gets two an hour. See what CADR means for how to read these.
Filters
- AirDoctor 5500. A pre-filter, a carbon and VOC filter, an UltraHEPA filter rated by the maker at 99.99 percent at 0.003 microns, and an ion setting.
- Blueair 7710i. A HEPASilent filter with a carbon layer and a washable pre-filter, with air quality sensors and Wi-Fi.
Ion settings can make a little ozone, so keep them off.
Looking ahead, extra-large-room purifiers are moving toward app control and filter subscriptions. The Blueair HealthProtect 7710i and 7770i from the older page show as currently unavailable on Amazon, and the AirDoctor 5500 has no Amazon listing that could be found. The catch is that the two units in this match-up are hard to buy through the same shop.
4 Large-Room Air Purifiers You Can Buy Now
Prices and ratings were checked on Amazon on October 16, 2026.
Price on Amazon: $612.00 | 4.4 stars from 977 ratings (checked October 16, 2026)
The Coway Airmega 400S is listed for up to 3,120 square feet with a HEPA filter, app control and a 5-year warranty. It has a 4.4 rating from 977 ratings.
Price on Amazon: $559.00 | 4.7 stars from 485 ratings (checked October 16, 2026)
The AirDoctor AD3500 is listed with UltraHEPA filtration and cleaning 630 square feet in 15 minutes. It has a 4.7 rating from 485 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: $169.99 | 4.5 stars from 2,575 ratings (checked October 16, 2026)
The Blueair Blue Pure 311i Max is listed for up to 2,107 square feet with Wi-Fi, auto mode and 23 dB quiet filtration. It has a 4.5 rating from over 2,500 ratings.
The risk to watch is the weight and the filter bill. The AirDoctor 5500 weighs 33 pounds and the Blueair 43 pounds, so both need wheels and a spot to stay. A large unit with costly filters can eat the savings of a big-room fix. Expect more makers to sell combo filter packs by the year. Check the room size, plan for a yearly filter set, and size by CADR, not by the largest room number.
Filter Cost
The older page gave the AirDoctor 5500i combo pack, with four carbon filters and two UltraHEPA filters, a price of $375, or $112 per filter. That is a large part of a year of use. Check the current price on the maker store. See the air purifier filter replacement cost guide for how to plan.
What to Buy Instead
For an extra-large room on Amazon, the Airmega 400S covers up to 3,120 square feet by its listing at $612.00, and the AirDoctor AD3500 covers up to 2,520. Our Coway Airmega 400 review explains how the claims work out, and air purifiers for large rooms has more choices.
FAQ
Is the Blueair HealthProtect 7710i still sold on Amazon?
The family shows as currently unavailable as of October 16, 2026.
How big a room does the AirDoctor 5500 clean?
About 868 square feet at five air changes an hour and 2,170 square feet at two, per the older page.
How loud is the AirDoctor 5500?
About 30 to 50 dB, per the older page.
What can you buy on Amazon instead?
The Coway Airmega 400S at $612.00 or the AirDoctor AD3500 at $559.00.
Final Word
The AirDoctor 5500 is the stronger machine of the pair, but it has no Amazon listing and costly filters. On Amazon today, the Airmega 400S or the AD3500 covers the same job.
What happens next: expect Wi-Fi models to replace both. The Coway Airmega 400S is $612.00 and the AirDoctor AD3500 is $559.00 on Amazon today.
Related Guides
Keep going with AirDoctor vs Coway, Coway Airmega 400 review, what CADR means, air purifiers for large rooms and air purifier filter replacement cost guide.
