CFS – Pack of 1, Universal Cut to Fit Carbon Pre-Filter Pad Roll for Air Purifiers, Furnace Filters, & Air Conditioner Filters – Fresh & Filtered Air for Indoor – Charcoal Air Filter Sheet – 16"x48"

Works as intended. Deep cleaned my fan, gross nasty dust in it, hopefully this will reduce that amount. Added some tape and cut to size. If Furnaces need filters why not fans that are not so easily cleanable.

Really nice

Dimensions are not accurate! I purchased the 16x48 inch filter roll. What a received was a little SHORT! It measured 15 15/16 x 47 inches. Not a big deal for my application, but it might be for others. Make sure you have extra when ordering since they seem to be using s SHORT ruler! Overall, it does appear to be of good quality, just a little short, so I only subtracted 1 star from the rating.

Air purifiers have gone up a stupid amount, like so many other things. We were about to just go without having one, but I wanted to make a last ditch effort to find filtration media we could cut to fit our old model. It cut easily with scissors and wasn't difficult to press into place. Triple-layering this makes for very clean smelling air and an easier rinse of each layer as needed. Now we have it running in our nursery 24/7 and we're all breathing easier. We'll be back to buy more! Thanks!

Works well for filtering toxins / dust in our RV

This was great, just what we wanted for our window air conditioner unit, we wanted to make sure that there was an extra filter one of our pets has asthma. So far this has been great, no smell, can cut the item to fit the size of the unit. This is also easy to clean and I feel like it's a great product, thick material.

Not very good

I bought this because i was gtting a cigarette odor in my apt and my AC was helping circulate the odor.I cut it to size and place it in my AC and the odor vanished.On occasion i get a slight whiff of cigarette odor, i set the AC to run and violah, the smell is gone.