Idylis U Universal Size Carbon Activated Pre Filter Cut to Fit (24"x20") Compatible with all Idylis Purifier Models

I bought this to add to an irregular sized air intake vent, as we can’t put an air filter in our furnace. This filter made the vent whistle, at an irritating volume.

Like that it can be cut to fit any size unit

I tried this brand in place of the Filtrete I have been using for many years. This is a cut to fit carbon pre-filter for my small Idylis air filter. I cut about 7 filters out of this one piece. While cutting I noticed a lot of black carbon dust on the counter and all over my hands. It was very difficult to clean up afterwards and I'm concerned about this dust being sucked into the hepa filter and being released into the air. This makes no sense as the Filtrete brand never does this. This type of carbon with the dust reminds me of cheap fish filter carbon I used to use when I had a tank. I won't be buying this product again and may not even continue to use them.Product: Seal Supply Idylis U Universal Size Carbon Activated Pre Filter Cut to Fit (24"x20")

It wasn't exactly as I expected, but it still works.

Just a sheet able to cut to size

Very reasonable price

I've been buying these for my Idyllis 10-280 air cleaner and I just bought another. I need a 20x12 pre-filter, and cutting this in half gives me exactly two of them. This is definitely the best value, compared to those others that look big in the pictures but are actually just 6.7 x 12, so it takes 3 of them to cover the full area.

Works great with our air purifer