Rabbit Air BioGS SPA-421A HEPA Air Purifier Review

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Rabbit Air BioGS: Features + Filtration Power

The Rabbit Air BioGS (model 421A) features innovative technology which has been developed and engineered by Mitsubishi Heavy Industries, that enables it to eliminate a wide spectrum of contaminants and allergens in the air. These include pollen, dust, dander, odors and chemical vapors which are efficiently removed from your home or office to allow for healthier breathing.  This will almost instantaneously begin saving you from the negative symptoms you are likely experiencing from breathing the current air in your home.

Rabbit Air BioGS – Pros and Cons

The Rabbit Air BioGS is equipped with a HEPA air filter which is constructed out of the most advanced and innovative bio-engineered fiber material available. This enables the filter to truly deliver in the capture and destruction of a range of common allergens such as pollen, dust mites and pet epithelia (dander/skin cells). Designed to last up to 3 years, based on twelve hours of operation per day, the claimed life of the filters used is quite long relative to competitors.  I will however say that I prefer to leave mine running 24 hours per day, even if just on low, to continually clean the air in my home.  This of course shortens the filter life, but it is a worthy sacrifice in my eyes.

The Rabbit Air BioGS efficiently traps 99.97% of all airborne allergens and contaminants measuring 0.3microns in size, while its nano-silver pre-filter will help to kill the airborne bacteria, viruses and mold. The unit also features a washable charcoal-based activated carbon deodorization filter which allows for the elimination of harmful chemicals, gases and unpleasant odors.  This is cool because you don’t have to keep replacing them.

Safe and inexpensive to operate, the Rabbit Air BioGS is constructed with an energy efficient design. This ensures that it doesn’t emit any ozone and only consumes 33 watts of electricity at high speed, and 7 watts at silent speed! Its cutting edge motor technology also features an inverter control which enables the unit to operate at 5 varying speeds such that it never has to run at a higher speed than is necessary to keep the air in your home at its optimal cleanliness.

I have seen people talking about the fact that the odor sensor which helps the auto mode select the proper speed is too sensitive and goes up for no apparent reason.  This happens on my personal purifier from another brand as well and I don’t consider it a huge fault.  I would rather it be over-sensitive than under-sensitive personally. I would also note another common design fault that I see on many purifiers which is the fact that the lights don’t have an off or dimming option.  What this means is that at night, they can tend to be a bit bright while you are trying to sleep.  Again, my personal purifier at home has the same issue and I just face it at an angle so I don’t have to look at them.  Not a deal breaker in my opinion.

The Rabbit Air BioGS – A Strong Contender

The Rabbit Air BioGS is able to purify the air in a room measuring up to 600 square feet (25’ x 24’) based on 2 air changes per hour.  This is quite a large area and I rarely see a purifier capable of cleaning areas larger than this.  Severe allergy sufferer’s may want to use it in a smaller space to get increased air changes per hour. When you see those budget air purifiers claiming they can clean 3,000 sq. ft. or more, it is definitely cause for suspicion.  The Rabbit Air BioGS also operates completely silent at low speeds, thus creating a minimum amount of noises to distract you; its operation is practically maintenance free and it is all in all very user friendly.   While a touch costly, between the features and capabilities that the Rabbit Air BioGS possesses, it should be a definite contender as you debate your choices. The popularity and reviews seem to speak for themeselves. There are well over 100 five star reviews for the Rabbit Air BioGS on Amazon!


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Rabbit Air BioGS User’s Manual

Rabbit Air BioGS Air Purifier


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  • Karen

    Well this one is certainly one of the sleeker and better looking air purifiers available. Can you wall mount this model?  Or have you reviewed others that can be mounted on a wall…ie behind a desk?

  • HepaAirPurifier

    This is a pretty sharp looking unit, but unfortunately it is not wall-mountable.The only air purifier I am currently aware of that can be mounted on a wall is the Rabbit Air MinusA2. The MinusA2 has several options for art on the exterior of the unit so when hung up on the wall it is functional art! That is one of the most unique things I have seen as far as air purifiers go. I don’t think I can link to it here, but if you use the navigation at the top of the page, you can find the Rabbit Air MinusA2 easily!

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