Review on 🌬️ Nordic Pure 20X25X4 Pleated Furnace Air Filter for Improved HVAC Filtration by Allen Hart

They are great although the label says 20x25x4 I had to return the 3M products because they were BIG and didn't fit in my air purifier. It's the right size and fits. Anyone complaining that it's too small should read the actual dimensions and gauge their slot. I have never given any 3M product a bad review because I couldn't measure before, and anyone who gave this great product a bad review because they didn't measure is wrong. It lasts about 3 months in my 5 ton block. I've heard people mention fan motor stress at higher MERV, seriously? It looks like the HVAC guy is trying to sell me a cheaper generic with a lower MERV at an inflated price on which he/she is making a good profit. Filters that don't pick up dust reduce the efficiency of your heat exchangers. This Nordic Pure filter is fantastic!