- True HEPA + 8 lbs activated carbon — 99.97% at 0.3 microns
- Sized for medium rooms — up to ~1,000 sq ft
- All-metal, pressure-sealed housing — no plastic off-gassing, no bypass
- Backed by a 5-yr parts / 10-yr labor warranty
Small size, packs a punch. The performance of this best-selling Airpura air purifier has been proven to eliminate a wide range of airborne chemicals and odors leaving only clean and fresh air.
Product Documents
Full Product Details
Airpura R400 — All-Purpose True-HEPA + Carbon Air Purifier for Medium Spaces
The Airpura R400 is the compact, best-selling member of the Airpura lineup—an all-purpose True-HEPA and activated-carbon air purifier for medium rooms up to ~1,000 sq ft. Its 360 CFM impeller pulls air through an 8 lb activated-carbon bed and a True HEPA filter, so it captures 99.97% of particles down to 0.3 microns while adsorbing everyday chemicals, gases, and odors. Like every Airpura, it's built in all-metal, powder-coated steel—no plastic off-gassing—with a pressure-sealed filter chamber so air can't bypass the filters.
How Airpura's filtration works
Air passes through three stages in sequence. A cleanable pre-filter catches large dust and lint (vacuum it and reuse it, replace about once a year). An 8 lb activated-carbon bed (100% coconut-shell carbon) adsorbs VOCs, gases, and odors. Finally, a True HEPA filter traps 99.97% of particles as small as 0.3 microns—dust, pollen, dander, and smoke. Airpura's pressure seal and close-ended metal filter caps ensure all the dirty air actually passes through the media rather than leaking around it, and the HEPA and carbon filters are changed separately so you replace only what's spent.
R400 vs. the R600
| Airpura R400 | Airpura R600 | |
|---|---|---|
| Coverage | Up to ~1,000 sq ft | Up to ~2,000 sq ft |
| Airflow | 360 CFM | 560 CFM |
| Carbon | 8 lbs activated carbon | 18 lbs activated carbon |
| Size / weight | 15.5" x 12", 23 lbs | 23" x 15", 42 lbs (on casters) |
| Best for | Medium rooms & offices | Large, open spaces |
Covering a larger, open space? Step up to the Airpura R600.
Why people choose the R400
- True HEPA—99.97% of particles at 0.3 microns—plus an 8 lb activated-carbon bed for chemicals and odors
- All-metal powder-coated steel housing—no plastic vapors or off-gassing
- Pressure-sealed chamber with metal-capped HEPA—no air bypass
- Compact 15.5" x 12" footprint at just 23 lbs—fits medium rooms and offices
- Separately changeable HEPA and carbon filters to save on replacement costs
- ETL certified and backed by Airpura's 5-year parts / 10-year labor warranty
Where it works best
- Bedrooms, home offices, and medium living rooms
- Apartments and condos
- Spaces with everyday chemical, gas, or odor concerns
- Homes near traffic or with allergy and dust sensitivities
- Any room up to ~1,000 sq ft
Frequently asked questions
How big a space does the R400 cover?
Up to ~1,000 sq ft at two air changes per hour (8-ft ceilings). In a smaller room it cycles the air more often for faster results.
What's the difference between the R400 and R600?
The R600 is the larger unit—18 lbs of carbon and 560 CFM for spaces up to ~2,000 sq ft—while the R400 is the compact 8 lb, 360 CFM version for medium rooms.
How often do the filters need changing?
The pre-filter is cleanable (replace ~12 months), the carbon filter lasts ~2 years, and the True HEPA lasts ~3 years, depending on your air quality.
Does it give off ozone?
No. The R400 is purely mechanical HEPA-and-carbon filtration—no ozone and no ionization.
Free U.S. shipping on orders over $99 and 30-day returns, subject to our return policy. Keep it performing with a genuine R400 replacement filter kit, or step up to the Airpura R600.
