Just got these Simply Filters for my HVAC system, and wow – they’re a game-changer for my allergies! The MERV 11 rating actually lives up to the hype, trapping dust and pollen like a champ. My sneezing fits have noticeably decreased since installing them.

The fit is *almost* perfect (17.75"x19.75" instead of the nominal 18x20), but they seal tight when the system runs. Pro tip: if your filter slot has adjustable tabs, you might need to tweak them slightly to prevent the occasional 'clunk' sound during startup.

What surprised me most? The pleat density! Way thicker than the big-box store filters I used before. You can literally see the debris they catch – my six-week-old filter looked like it fought a dust bunny war and won.

At ~$12/filter in this 6-pack, they’re cheaper than Filtrete but perform just as well. Only gripe? I wish they made a 4" version for even better airflow and longevity. Still, 5/5 for us allergy warriors!