Review on Nordic Pure 20x20x4 MERV 12 2-pack Furnace Filters by Martin Alvarez
Very good oven filter
Really good oven filters. I modified the 1" thick vessel to accommodate these 4" filters and am very pleased with the results. We often have wildfire smoke coming through the windows before we can close them. To my relief, this filter greatly improves air quality when it does. I know MERV14 is really better for filtering smoke, but this filter really helps. Also, this 4" thick filter has a much larger surface area than the 1" MERV12 filter, and thus the oven fan works much less with it. There is no reason for me to get other filters than these. Good product.
- Quality construction
- Some problems
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