The air purifier recommended by National Sleep Foundation, Austin Air Bedroom Machine air purifier is an ideal air cleaner on providing healthy sleep typically for people sensitive to allergens that would lead to a sleeping disorder. With its standard filtration plus a unique 15 lbs of proprietary carbon blend and a High-Efficiency Gas Arrestance (HEGA) carbon cloth, Austin Air Bedroom Machine 402 is capable of handling micron particles, gases and chemicals without causing too much disruption to the owner. Continue reading to learn more about the air purifier.
[STAGE 3]15 lbs. Activated Carbon and Zeolite filter
[STAGE 4] 60 ft. True HEPA filter
[STAGE 5]HEGA Carbon Cloth
3 fan speeds
5 years pro-rated filter lifespan
5 years mechanical warranty
Austin Air Bedroom Machine review
5-stage filtration with consistent airflow and wide purifying coverage.
Effective trio pre-filter that would also reduce workload of HEPA filter.
Durable and reliable 60 sq. ft. True HEPA filter.
Dual chemical flirtation with 15 lbs. Activated Carbon and Zeolite and HEGA Carbon Cloth filter.
Premium built with powdered coated steel housing.
Long-lasting and cost-effective 5 years filter lifespan.
5 years manufacture warranty for Austin Air Bedroom Machine.
Louder than average fan noise.
Wide and heavy but casters is there to support its weight.
Hassle filter replacement that requires replacing the filter from bottom cover.
No auto fanspeed adjustment, air quality monitor and sensors, timer and remote control.
14.5 x 23 x 14.5 in
(36.8 x 58.4 x 36.8 cm)
47 lb (21.3 kg)
Austin Air Bedroom Machine is a cube-shaped air purifier that shares its design elements across all Austin Air purifier range. Size at a dimension of 14.5 x 23 x 14.5 in with 47 lb weight, the air purifier is far from light but there is 4 built-in caster that enhanced the air purifier mobility. Build quality is strong and sturdy made from powder-coated steel. Control is plain and simple with only front dial knob that allows simple 3 fan speed adjustment. Other features include 5-stage filtration, 360° progressive Filter System, excellent 5 years filter lifespan, NRTL (Nationally Recognized Testing Laboratory), CSA (Canadian Standards Association) and CE (Conformité Européenne) recognized, zero ozone emission, 30 days money-back guarantee and 5 years warranty. What you will not get from the air purifier is air quality sensors, auto/ sleep mode, timer, digital display, filter replacement indicator, and remote control.
Airflow, speed, and CADR
1500 sq. ft. (139 m2)
72-400 cfm (122-680 m3/h)
Austin Air Bedroom Machine all-around 360° progressive system help boost the air purifier to an impressive 1500 sq. ft. purifying coverage that is perfect for living hall, lounge, dining room although not so much on bedroom due to the noise generated (more on this later). Airflow delivery rate stands between 72 - 400 cfm airflow with 2 air release hourly. In short, the airflow performance is equivalent to every other standard Austin Air purifiers which you could see from the table comparison link above.
What’s inside count
Large Particle Pre-filter
60 sq.ft. True Medical Grade HEPA
15 lbs. Activated Carbon and Zeolite
Medium Particle Pre-filter
HEGA Carbon Cloth
^ Austin Air Bedroom Machine filters/ technologies/ lifespan
Most Austin Air purifiers only come with 4-stage filtration, Austin Air Bedroom Machine lead the way with its 5-stage filtration that provides additional filtration against chemicals and odors. Targeting large contaminants is the mesh permanent filter and inner pre-filter while medium particles filter would obviously target medium-sized particles. Last stage 60 sq.ft. True HEPA filter would eliminate any contaminants that were not trapped by the previous filters. For smoke and odor related contaminants, Austin Air Bedroom Machine 15 lbs. Activated Carbon and Zeolite plus the added HEGA Carbon Cloth would ensure no chemicals would be flown back out in the air.
Hair/ Pet hair
In general Austin Air Bedroom Machine 5-stage filtration is vastly efficient when pit against large-scale and small scale contaminants, allergens, bacteria and viruses. Driven by immense airflow circulation and wide purifying coverage, Austin Air Bedroom Machine included filtration is spectacular in eradicating dust, hair, pet hair, dust mites, pollen, mold, spores, mildew, fungi, germs and pet dander. On dealing smokes and odors, Austin Air Bedroom Machine is also spectacular against chemicals, cooking odors, detegent odors, VOCs, tobacco smokes, cigarette, radon and ammonia.
Keep it down
40 - 65 dB
Austin Air Bedroom Machine is touted to be a bedroom companion, the high 40 - 65 dB noise level should suggest otherwise as there is no sleep mode or auto mode to help with the speed adjustment. The best way to keep the air purifier from disrupting your sleep is to place it further back till you are comfortable with the noise generated. Power consumption like every other Austin Air purifier is at average 132 W.
At what cost
Annual Filter Cost
^ Replacement filters/ estimated cost
Austin Air Bedroom Machine is the most expensive Austin Air purifier in its class. What you will get from the air purifier is the added filtration that would give you the extra protection against chemicals and allergens. Filter replacement cost is very cheap due to the bundled filter package that could last up to 5 years on normal condition. Replacing the filter is not easy but the good thing about the long filter lifespan is you will only have to replace the filter once every few years.
Austin Air HM402 might be specifically designed to enhance a user sleeping environment; the dimension of the air purifier still stands at 36.8 cm in width/ depth and 58.4 cm in height. As with most Austin Air purifier, the unit is built with powder steel housing plus 4 bottom casters with the total weight of 21.3 kg (Including the bedroom filter). On top of the very heavy air purifier is a 360° air intake/ outtake that draws air via its centrifugal fan. Other than that, there is only a plain manual knob that controls the fan speeds. Inside the interior is the typically dual-stage pre-filters that stop medium to large airborne particles, a 15 lbs. of activated carbon zeolite to removes chemicals, gases, odors and a 60 sq. ft. The HEPA filter in removing 99.97% of leftover particles as small as 0.3 microns. Addition to the Austin Air HM402 is the final 5-stage HEGA Carbon Cloth the can further capture all the unwanted allergens and gases.
Applicable area, airflow, noise level and power consumption
Austin Air HM402 air purifier might be built for bedroom, its large purifying capacity at 7 m2 (938 sq. ft.) will also suits well for living room. With the advanced 5-stage filtration system, the air purifier can deliver a minimum of 125 m³/h to a maximum of 667 m³/h airflows. Noise level is between 39.8 dB to 64.5 dB, slightly noisy at high speed and finally, power consumption is at an average level of 115 watts.
Final thoughts on Austin Air HM402
For a relaxing, healthy sleep, Austin Air HM402 air purifier is a fantastic choice for someone that needs almost allergen-free sleeping environment. Combined with Austin Air reputable build quality, excellent filtration and long-lasting filter, no doubt Austin Air HM402 is highly effective at removing allergies, gases, and other linked respiratory issues. However, its background white noise at high speed will bring annoyance to some. Other than the minor complains, HM402 is a reliable, safe choice for long-term usage that we would recommend as we did for most Austin Air purifier.