Where to buy for those in the UK?  IQAir produces three different air purifiers:  Pre Max Filter: This is a large particle pre filter. The intention is the larger particles will saturate that part of the filter instead of the other two.  Gas and Odour filter (V5 Cell): The V5 cell contains about 5 pounds of carbon and alumina that filters unwanted gas and … Continue reading IQAir Health Pro 250 Air Review-Still worth it in 2021?