People on the lookout for an automatic air purifier should check out the customer reviews at Amazon on the Rabbit Air BioGS SPA-421A. This air purifier gets a lot of reviews compared to other brands and what is even better is that most consumers give it a 5 star rating. After having read most of the reviews, there really only seemed to be one valid and recurring negative point.

So let’s start with the cons and then move on to the pros. There were basically two complaints, one of which seemed indisputably that it was a shame that the bright sensor lights of the BioGS SPA-421A could not be turned off, especially at night in the bedroom. The only solution for now is to throw a dark piece of cloth on top to stop the sensors from lighting up the room. Not ideal, but still also not the biggest problem in the world I would imagine.

Complaint number two came from people claiming that the automatic function was not working as expected meaning the unit didn’t shoot into action when people considered the air quality less than desired. By reading the instruction manual on Rabbit Air’s website as well as the feedback from other customers, this seemed to be much more related to people not setting the baseline upon first use.

According to the manufacturer you are supposed to let the machine clean the air in manual mode until the air is completely clean. Once this has been achieved you can program the sensors of the Rabbit Air BioGS SPA-421A to take this as a measurement or baseline for clean air so that the machine will come out of standby mode once it senses that the air quality has deteriorated.

Manual air purifiers like the Honeywell air purifier 50250n do not have such a mechanism in place and are either turned on or off by the user. This also explains why the Rabbit Air BioGS gets high praise for being very energy efficient. Another benefit this air purifier holds over it competitors is that the filters last well over one year before they need replacing and that the cost of the replacement filter is very reasonable.