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Is a Dyson purifier worth triple the price of a plain HEPA box?

Owned one of the expensive towers for two years, sold it. The formaldehyde and VOC readouts on the screen were the main reason I bought it and I stopped trusting them within a month, because the number would climb every time I opened a bottle of cleaning spray and then sit high for hours regardless of whether the unit was on. Air felt fine. So did the cheap box I replaced it with, at a third of the filter cost.

180 · in/indoor-air-quality ·