How to choose an air purifier

November is really a mixed month. On the one hand, we are now free to frolic with friends and family and get our retail fix in the stores. On the other hand, the air is almost exclusively made of pollen, we hit bushfire and thunderstorm asthma season, and there is the annoying pandemic that still haunts us every time. With all these things comes the importance of clean airflow and thus air purifiers. So you need one, what are the important things to look for and what should you do with it?

First, you need an air purifier if you have allergies or asthma, live with someone who is sick with an airborne virus you do not want to get, you cook a lot and / or live in an area near A busy road or a lot of smoke.

Cleaners should be well sealed, good at pushing air around and powerful enough for your room.

Cleaners should be well sealed, good at pushing air around and powerful enough for your room.

The Victorian government recently purchased more than 50,000 purifiers to put in school classes to reduce the COVID burden and transmission in these environments. Store, restaurant and beauty salon owners should also consider getting a good cleanser to reduce the risk to staff and customers.

Air purifiers are designed to remove ridiculously small particles from the air, with PM2.5 (2.5 microns) being the most dangerous. The WHO recently revised its Global Air Quality Guides and proposes to limit exposure to only 5 micrograms per day. cubic meters, down from their previous proposal of 10. A recent study suggested that changing the safe limit in America from 12 down to 10 would save about 200,000 lives a year, so air pollution is not a trivial thing.

The problem with trapping such small particles is that if they are small enough to pass through our lungs and into our blood, the cleanser must be extremely well sealed to prevent it from just becoming a PM2.5 dispenser. It must also be able to efficiently move the clean air around the room.

The absolute minimum you need in an air purifier is a HEPA filter. In addition, a powerful blower is extremely important (for the circulation) and I would recommend a carbon filter for gases, odors and VOCs. When choosing which size model you need, it is better to always round up. Each model should show you the size of the space it is designed for in square meters and clean air supply rate (CADR) in cubic meters; for CADR, larger numbers are better. In addition to having a strong fan speed, it’s nice if the cleaner also has a variety of speeds, including an extra quiet night mode, if you plan to use it all the time.

I have used four different cleaners in the last few years and three of them have really impressed me.

I would not recommend a Philips cleaner as every single one I have used has had a filter sensor fault and died an annoying death shockingly fast.

Dyson Hot + Cool Link Formaldehyde does an extremely good job of cleaning a room of up to 81 square meters evenly (instead of just the area around the cleaner), while also heating or blowing. Being able to check particle numbers and gas levels in the app or on the screen is very useful and it is sealed and tested far beyond the industry standard.

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