Airpura G400 Air Purifier

Airpura rates this machine for up to 1,000 sq ft at two air changes an hour, with 8-foot ceilings. For four air changes, which is what we suggest for smoke, asthma or chemical sensitivity, plan on about 500 sq ft.

• The G600 ($1,099.98) moves 560 CFM and is rated by Airpura for 2,000 sq ft at two air changes an hour.
• The G700 ($1,249.98) moves 635 CFM and is rated by Airpura for 2,500 sq ft at two air changes an hour.
• The G414 ($749.98) is the same machine with a Super HEPA filter, 99.99% at 0.3 microns, in place of True HEPA at 99.97%.

Airpura filter life varies by model and usage. Airpura rates the carbon filter at about two years of continuous use in a typical home. HEPA and pre-filters have their own replacement schedules. Replacement filters are available on our filters page. Running the unit below its rated capacity meaningfully extends filter life.

The 400 series has a three-speed fan. The lowest setting is the quietest and suits overnight use; the highest is meant for clearing a room quickly. See our quiet bedroom guide for Airpura's published decibel figures.

No. This unit uses only mechanical filtration — no ionizer, no UV, no ozone generator. That matters for people with asthma or chemical sensitivity, because ozone is a known airway irritant. Airpura does build UV-equipped machines, and they are gathered in the UV air purifiers collection — this is not one of them.

Yes. Austin Air and Airpura units are used by patients with asthma, allergies, and chemical sensitivity. The True HEPA captures particle-class triggers and the activated carbon addresses VOCs, odors, and chemical compounds. No ionizer, no ozone — safe for respiratory conditions. For MCS specifically, the HealthMate Plus or Airpura C600 have the most relevant specifications.

Yes. Airpura units are designed for continuous residential operation. The steel-body construction and quality motor components are built for this use case. The 400 series has three fan speeds, and a low to medium setting suits continuous use. Continuous operation at a moderate speed outperforms intermittent high-speed runs for maintaining consistent indoor air quality.

Airpura units ship free directly from their facility in Montreal, Canada. Most orders arrive in 4 to 9 business days, including 1 to 3 business days to process. You will receive a tracking number once your order ships. Import duties and customs fees are included in the product price — no surprise charges at delivery.

Airpura units carry a 5-year warranty on parts and labor, plus labor-only coverage to 10 years. As an authorized Airpura dealer, Fresh Home Air supports the full manufacturer warranty. Contact us at support@freshhomeair.com for warranty service.

Run it in your home for 30 days. If it is not right, email support@freshhomeair.com and we will send you a prepaid, insured return label. We pay the return shipping, there is no restocking fee, and you get a full refund once the unit is back with us. If it arrives damaged or faulty, email us within 7 days with photos of the item and the packaging. We will send a replacement and collect the original, and you pay nothing.

Yes. No ionizer, no ozone, no UV. Mechanical HEPA and activated carbon only, safe for continuous use in rooms with children and pets.