So in my apartment, I have a giant grill just inside my entry that is the return air vent for my furnace. Once every 6 months or so, the friendly people stop by to change the "filter." I let them, it's the least I can do. Literally, it's the very least I can do. The last time they changed my "filter" was about a month and a half ago. It should be noted that I have never dusted so much in my life. My ceiling fans are impressively dirty. My silver trimmed television is more of a charcoal grey currently. The reflective surface of my A/V rack isn't so reflective. So as I spray three-four bottles of windex about my apartment and use the better part of a long lost rainforest in an attempt to eliminate the dust, I am forced to ask: "Mr. Filter, what in the hell are you filtering? Perhaps they have mis-named you. You are not a "Furnace Filter." You are an "Expedite The Movement of Dust Around the Apartmenter," (EMDAA for short)