Very happy to buy these online with reliable Sams Club. I was going to use another online vendor but I saw that Sams Club sold them. These are the filters I have been using and the price was right.

These are great furnace filters. My local big box stores were sold out so I ordered this twin pack. I have used Filtrete filters for a long time as I think they are the best.

These are a little pricey. I have used some "generic" one with a higher MERV rating with better results, but cannot always find those. These do work pretty well, but need changed more frequently.

my wife sheds like a donkey (and smells like one too) and we have to replace our filter often. This one works great and is priced well below some of the other brands.

Had to measure down on what our furnace requires, since this is technically not the brand of our HVAC system. However, this filter works great. I switch it out every three months.

Fit perfectly and aided tremendously in the process of removing mold from my mothers home. The ones made specifically for Honeywell weren't cutting it.

Dented Box, Dented Filters. While they apparently shipped in a box from 3M, there was a nice crease in the box which ended up creasing BOTH fitlers. Given these filters are 4" in width that's pretty amazing.

Keeps the air flowing!

Great air filter

Buyers beware: The actual size of the 16x20x4 was reduced at some point last couple of years. As the result it doesn't properly fit in Honeywell / Lennox filter boxes, despite the advertisement on the packaging. The filter size used to be 15-7/8" x 19-7/8" x 4-5/16". The new filter size is 15-7/16" x 19-3/4" x 4-5/16", so it is 7/16" (1 cm) narrower than the old filter.