Actually, the air filter was too small. Way too small, to the point of doing nothing. The inside of the air duct has so much dust. It took me 2 and a half months to notice it, because that was when I said, "Hey, isn't it about time to change our air filter?"

So I bitched about it and he bought air filters that were too big. Finally we have the right sized air filter, and I can tell the difference. I'm not waking up stuffed anymore.

My question is, wouldn't leaving the A/C running with no air filter, in the blazing summer Virginia heat, reduce the efficiency of our A/C therefore increasing our utility bill? What other effects might this have? It's still pumping out relatively cool air but I really wonder, it seems to be on constantly even though it's set at a less agreeable temperature.