Derek Cole shows why cheap HVAC filters fail: a salt test reveals small particles pass right through. Since tiny particles cause 98% of indoor air problems, upgrading to a higher-efficiency filter matters more than blocking larger debris, though you need one that doesn't restrict airflow.
When our techs go out to the house, they can recommend what's better for you. But I would— yes, you need a better filter than the 69-cent Home Depot see-through filter. I mean, if you can lay it on your table, take salt, pour it over it, and the salt gets through, that's not a good filter. That makes sense? Because you're trying— I mean, The big filter is stopping, or the cheap filter is stopping things like sandwiches and chickens and any kind of furry pets from coming through, but it's not stopping the small particles that you need to be stopping. And that is 98% of your problem is the small ones, not the big ones. So that's what you need to be focused on. So the better filter is better for you, but you do have to walk a fine line of restricting airflow and stopping the particles.
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