Trying to decide on an air purifier. I'm thinking of either buying 2-3 of the Coway airmega AP-1512 or one of the Coway Airmega 400. Not sure what the difference is between
Coway Airmega 400 | Home & Office Air Purifier | Large Spaces Purifier – Cowaymega
Whisper-Quiet Air Purifiers for Bedrooms | Sleep Better with Airmega – Cowaymega
Amazon.com: Coway Airmega 400S App-Enabled Smart Technology Compatible with Amazon Alexa True HEPA Air Purifier, Covers 1,560 sq.ft, White : Home & Kitchen
COWAY AIRMEGA 400 air purifier for large room, office, restaurant, ECARF certified for allergy suffers, HyperCaptive filtration system with ultra powerful double suction room up to 176 ㎡ : Amazon.co.uk: Home & Kitchen