Flanders Precisionaire 20x20x1 Case (Nested) - Product #2488665 Review

Superb pre-filter for my hybrid heat pump with integrated HEPA filter. This filter makes HEPA much cleaner and my HVAC specialist recommends this high capacity, high porosity pre-filter. This bulk purchase greatly reduced my costs, as did the time it took me to find that somewhat outdated 21 x 21 x 1 inch. It's not really intended to be the primary single filter for your system. IMHO. It only catches larger particles, insects, etc. e. Swapping every 4-5 weeks in a household with no pets and no…

Used Flanders filters in my last home for many years. This time I think the 20x20 size is not strong enough. My device bends the filters easily and I'm afraid they'll end up in a hole I can't reach. Tried to pin but these filters are too big for such a thin cardboard frame. Flanders would suggest abandoning this photo frame style filter and going back to a cardboard frame on the sides to allow the filter to hold its shape.

Our air conditioning was broken. The technician who came to fix it said that using metal mesh filters puts a lot of strain on the unit. We could hear a loud bang every time the AC was turned off as the metal filter was put back in place. We spent about $50 on a metal filter thinking we would save dollars since it can be washed. However, Flanders filters that fit perfectly work best. We change them monthly. When we take them out, a lot of dust has accumulated on the filter, which means that it…