The G400 is designed for individuals with chemical sensitivity for whom the carbon source matters as much as the filtration chemistry. German-sourced activated carbon from Blücher Technologies is produced via a different manufacturing process than standard North American carbon — resulting in a product with lower inherent residuals and a purer adsorption profile. For MCS individuals who react to standard activated carbon itself, or for users requiring the cleanest possible chemical filtration in a single-room unit, the G400 provides broad-spectrum VOC and chemical filtration with a carbon source calibrated for sensitive populations.
| Spec | Detail |
|---|---|
| MSRP | $709.98 |
| Series | 400 |
| Designed For | Broad-spectrum chemical filtration — German-sourced carbon for sensitive individuals |
| Carbon | German-sourced activated carbon (Blücher Technologies) |
| HEPA | True HEPA, 99.97% @ 0.3 microns |
| UV-C | No |
| Airflow | 360 CFM |
| Fan Speeds | 3 |
| Coverage | ~1,000 sq ft |
| Housing | All-metal, pressure-sealed |
| Ozone | None |
| Ionizer | None |
| Warranty | 5 yr parts / 10 yr labor |
Pre-Filter — Captures large particles at intake. Protects carbon and HEPA stages. Replace annually.
Carbon Bed — German-Sourced Activated Carbon — Blücher Technologies spherical carbon with a purer manufacturing profile than standard activated carbon. Adsorbs VOCs, formaldehyde, benzene, toluene, xylene, chemical off-gassing compounds, and airborne chemical contaminants across the standard adsorption range. Specified for individuals whose chemical sensitivity extends to reactions from standard carbon manufacturing residuals.
True HEPA — 99.97% @ 0.3 microns — Removes fine particulate, mold spores, pollen, pet dander, bacteria, and airborne viral particles.
No pre-packaged replacement bundles for the 400 series. Replacement filters sold individually — contact Fresh Home Air for current filter pricing.
| Filter | Suggested Interval |
|---|---|
| Pre-Filter | Every 12 months |
| Carbon Filter | Every 2 years |
| HEPA Filter | Every 3–5 years |
| Zone | States | Rate |
|---|---|---|
| Zone 1 | ME, NH, VT, MA, NY, CT, RI, NJ | $51.95 |
| Zone 2 | MD, DE, WV, VA, OH, MI, DC, PA | $55.41 |
| Zone 3 | WI, IL, IN, KY, TN, NC, SC, GA | $60.16 |
| Zone 4 | FL, AL, ND, SD, MN, NE, IA, KS, MO, AR, LA, MS | $67.13 |
| Zone 5 | MT, WY, CO, TX | $73.77 |
| Zone 6 | WA, OR, CA, NV, ID, UT, AZ, NM | $78.72 |
Contact Fresh Home Air for 400 series chemical model filter shipping rates.
G400 vs. C400: The C400 uses standard activated carbon for broad-spectrum chemical filtration. The G400 uses German-sourced carbon — appropriate when the carbon source is a reactivity concern, not just the chemical target range. G400 vs. G414: The G414 adds Super HEPA 99.99% — appropriate when fine particle sensitivity compounds the chemical sensitivity concern. G400 vs. G400 DLX: The G400 DLX upgrades to enhanced impregnated German carbon for expanded chemical capture range. If ammonia, chlorine, or reactive compounds are triggers alongside the standard VOC range, the G400 DLX is the correct choice. G400 vs. G600: The G600 carries German-sourced carbon at 560 CFM for 2,000 sq ft. The G400 is correctly sized for a single room.
*Manufactured in Montreal, Canada.*
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Comparison reflects Austin Air and Airpura products sold on freshhomeair.com vs. common consumer-grade air purifiers.
Everything you need to know before you buy.
Coverage varies by model — check the product specifications above for the rated room size. As a general rule, all units perform best when running below their rated capacity, which reduces noise and extends filter life.
Airpura filter life varies by model and usage. The carbon bed in this unit is rated to last 2–3 years under continuous use in a typical residential environment. 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.
Austin Air units have 4 speed settings. Speed 1 is quiet enough for sleeping. Speed 2 produces a consistent low hum that most people find unobtrusive. Speed 3 is suitable for daytime use. Speed 4 is intended for rapid air changes in emergency situations — wildfire smoke events, high-pollen days — not for standard overnight operation.
No. This unit uses only mechanical filtration — no ionizer, no UV, no ozone generator. It is safe for people with asthma, chemical sensitivity, and other respiratory conditions where ozone is a known irritant. This is a firm design standard across the entire Austin Air lineup.
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. Most Airpura users run their units continuously at speed 2–3. Continuous operation at a moderate speed outperforms intermittent high-speed runs for maintaining consistent indoor air quality.
Airpura units ship directly from their facility in Montreal, Canada. Orders typically clear customs within 2–3 business days and arrive within 7–14 business days to most US addresses. 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. As an authorized Airpura dealer, Fresh Home Air supports the full manufacturer warranty. Contact us at support@freshhomeair.com for warranty service.
We accept returns within 30 days of delivery for units in original condition. Contact us at support@freshhomeair.com to initiate a return. Return shipping is the responsibility of the customer unless the unit arrives damaged or defective. Units that arrive damaged should be reported within 48 hours of delivery with photos.
Yes. No ionizer, no ozone, no UV exposure to room air. The Austin Air HealthMate was specifically studied at Johns Hopkins for use in children's homes — the clinical research involved families with young children. These units are safe for continuous operation in homes with children and pets. They are in fact commonly deployed exactly for this purpose.
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