Getting the direction of airflow furnace filter right
Figuring out the right direction of airflow furnace filter is one of those small home maintenance tasks that actually matters way more than you'd think. You're standing there in front of your HVAC system, holding a fresh, clean filter, and you see that little arrow on the side. It seems simple enough, but if you stop to think about it for more than ten seconds, you might start second-guessing yourself. Does the arrow point toward the ductwork or toward the big metal box? If you get it wrong, you're not just being a bit messy—you're actually forcing your furnace to work way harder than it should. ...