Okay, so I've been using these Nordic Pure filters for a few months now, and here's the real tea ☕

First off - the air quality improvement is NO JOKE. My allergies have been way better since switching to these MERV 12 bad boys. The pleats seem to catch everything - pet hair, dust, you name it.

BUT (and this is a big but) - MEASURE TWICE, ORDER ONCE! The sizing is... quirky. My furnace takes "20x25x4" but these are actually smaller (19.5 x 24.5 x 3.63). For me it worked out fine, but I can see how this would be a nightmare if your system needs an exact fit.

The price? Chef's kiss 👌 Way cheaper than buying at Home Depot. I set up the subscription and now fresh filters magically appear when I need them.

Pro tip: If you're replacing an old Honeywell or Lennox filter, double-check those measurements like your HVAC system's life depends on it (because it kinda does). Some folks in the reviews had to go with the 5" version instead.

Final verdict? If they fit your system, these are absolute gold. Just don't be like me and assume standard sizes are actually standard!