Filament not lined up on several bottom rungs , pattern runs off which made for a 1/2 gap on lower corner., had to put tape on gap.Very poor quality control. Ordered lowest quality but still no excuse for this
[This review was collected as part of a promotion.] ordered 6 19.5 X 23 X 1 Merv 8 filters. Rec'd 6 19.5 X 23 X 1 Merv 11 filters. My HVAC guys tell me that the Merv 11 filters are to restrictive causing the coil to freeze up. To prevent this I have to change the filters far more often. This is not cost effective I'm not happy