TopTech TT-FM-2025 OEM Air Filter, 20x25x4 MERV 11, Assembly Required | Genuine OEM for TechPure TT-MAC-2522 & TT-MAC-2025 air cleaners; ships flat, assembly required before install

This filter works very well in my system. One of my favorite parts of it is how I only need to change it at 6-month intervals vs. every month as in my old system. Aside from having to put the filter together, it installs easily and works perfectly.

Have used these for years and none work as well for us.

What can I say? These filters fit my needs exactly; especially since it was the model I needed. The ones on eBay are not the correct dimensions. The order was filled quickly and the new filter is protecting my A/C unit from pet hair and dust as I type. I would recommend changing every three month if you have pets but the filter was perfect. Oh, did I mention it came in a perfect box, no damage. So kudos to distributor and to UPS for getting there undamaged.

A little cumbersome, corners were not pre-bent accurately. But, appears to be money well spent.

I've been ordering these filters every 6 months for the last two-and-a-half years. They are quality filters that are easy to put together if you pay attention to the instructions. The filters fit perfectly into our HVAC system. For the price and the quality, these are great filters.

Bought one filter to assemble and one ready to go. A little effort to put it together buy saved some $$$

I have always used this filter for my annual HVAC maintenance. It is much cheaper than buying it from my service provider, and they install it for me. There have never been any problems.

This box had 2 of the corners completely glued together, causing me to have to rip them to open it and assemble the filter. I ended up using that portion of the filter from the old one I was replacing. This was the 2nd set I have purchased and only the first time this has happened.