Change Your Furnace Filter Before Winter (5 Minutes, Real Money)
The first cold morning hit, the furnace kicked on, and the whole house smelled like burning dust for a day. That's not the furnace dying. That's a summer's worth of dust cooking off — and a filter that's been sitting there since spring doing nothing useful. The job: find the filter slot (usually right where the duct meets the furnace, or behind the big return vent), slide the old one out, slide the new one in. Mine came out grey and felt-like, which is what a filter looks like when it's stopped filtering and started blocking. Five minutes, start to finish, and most of that was finding a flashlight. The arrow matters: every filter has an airflow arrow printed on the frame. Arrow points toward the furnace. Put it in backwards and it doesn't work right and can shed fibers into the system. That's the whole trick, honestly. Buy the right size: the size is printed on the edge of the old filter's frame — 16x25x1, whatever yours is. Take a picture of ...