Features:

• Fits Honeywell enviracaire models 13500, 13502, 13503 (EV-35B), 13520, 13523, 13525, 13526, 13528, 13350, 50250, 50251, 52500, 63500, 83162, 83259, 83287, and 83332.
• HEPA filter is 99.97% effective at removing particles as small as 0.3 microns from the air that passes through the filter.
• Measures approximately 10 1/4 H x 9 1/4 ID x 14 1/2 OD.
• Surround Seal filter technology

Editor Reviews:

Product Description:
Surround Seal filter technology prevents dirty air from leaking around the filter. For optimum performance replace filter every 12 months.

Rating : - Yep, it's an air filter
I have severe allergies, so we run our air purifier all night, every night in the bedroom. It's a great deal for us to find this full size heppa filter for our machine. If we used the universal replacement filters, we'd need to use 3 of them. By the time we stack them, we get half rubber edging and half heppa filter. I much prefer the full size heppa filter. I think it does a more efficient job.