Okay, so I've been using these Filtrete filters for half a year now and here's my real talk review!

First off - the fit is PERFECT for my Lennox system. I was worried about the 'actual size vs nominal size' thing, but it slides in like butter. No awkward gaps or forcing it in.

The air quality difference is noticeable AF. We have two cats and my allergies used to be terrible, but now? Way better. I'm not sneezing my head off every morning.

Pro tip: Change these every 3-4 months if you have pets! The packaging says 12 months but trust me, you'll see the difference with more frequent changes.

Only complaint? They only come in 2-packs. Like c'mon Filtrete, sometimes I just need one! But at this price point compared to Lennox brand filters, I can't really complain too much.

Final verdict: Would definitely buy again. My HVAC guy approves, my nose approves, and my wallet approves (kinda).