Why Pre Filter Air Purifiers Might Do More Harm Than Good?
- Paddy Robertson
- Paddy Robertson
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The information is correct, however a pre-filter located at the return grill also keeps the return duct from getting dusty. That is a benefit that should also be considered.
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One more thought: is having three units operate side by side the best test?
It seems to me that the pre-filterless unit is benefiting the most by having two adjacent air purifiers keeping its intake air relative free of large particles.
IMO, you should be holding initial air flow constant. No one would expect a pre-filter to have a ben… 阅读更多 »