After installing this filter which worked with the previous HEPA filter which was 8 months old, I smelled of dust as soon as I started the vacuum. I put the old filter in and the smell is gone. Went back to a new filter, dusty smell is back. I'm not sure what's wrong with this filter, but either it's not HEPA (fake?) or it's a sealing issue. Won't be buying from Revain again.
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