Be sure to keep a box or two of these pre-filters on hand in case they become back ordered. The HEPA filter needs to be changed in 1-3 years, depending on conditions where it is located.


Universal Pre-Filter   April 18, 2003
M. Gebis (Southern California)
18 out of 19 found this review helpful

This filter is larger (taller) than it needs to be for most machines. You simply trim the filter (and it's got pre-made perforations) to the height of your machine. And yes, this means that if you have one of the smaller machines, one which is less than half the height of the pre-filter, you might get two pre-filters for the price of one. Bonus.


Good price, quality product...   August 21, 2005
Jeffrey Pierce (New York, NY)
16 out of 19 found this review helpful

I'd recommend getting the Honeywell version over the cheaper imitations, so as such, this receives my highest rating. It comes with good installation instructions, and getting it out of the box and onto your Hepa filter is a breeze, so if you're in the market for one of these suckers (which if you're like me, means you're in the market every 3 months), then grab it, it's cheap and you can count on the quality since it's made by Honeywell.


It's my choice in universal replacement pre-filters!   June 13, 2007
Hayley (Santa Monica, CA)
4 out of 4 found this review helpful

Changing my Enviracare pre-filter is one of the great pleasures of my life. Just knowing that we're not breathing in all that gunk makes it all worthwhile. Honeywell has a very low-tech solution to fitting this oversized filter: cutting it with a scissor. I would recommend trimming the filter material over a newspaper, as it can leave carbonaceous residue. Also, remove the old dirty filter inside a large garbage bag, as it's very easy to shake loose and spread around the dust and particulate crud you're trying to contain.


Good filter, I've used it for years   December 14, 2007
zaxwrit
4 out of 4 found this review helpful

This is a good prefilter for my Hepa machines. I live in a congested part of NYC with lots of traffic and have two filters running at all times to keep the apartment's air clean. These prefilters last between 2 and 3 months, depending on local air quality. When I change them I can really appreciate them - all that disgusting gunk on the filters instead of in my lungs. As others have said, the filters come two in a package. Cut them in half widthwise (do it over a counter because the charcoal gets all over), then wrap the prefilter around the Hepa filter and secure with the supplied velcro strips. That's it, quick and easy.