$7 Air Purifier

I've been suffering from some allergy problems lately and while I was at Lowe's, I took a look at their selection of air purifiers. Much to my surprise, the cheapest one they had was $70. I took the liberty of taking apart the display model while I was there. It seems that there isn't much magic going on inside these things. It consisted of a squirrel cage fan and an air filter. Since I already had a box fan at home, I decided to walk down to aisle 20 and grab a furnace air filter to make my own. I picked the cheapest filter that could still filter pollen. I'm happy to report that with a little duct tape, I have constructed my very own air purifier at a fraction of the price. After using it for a week, I am amazed at how much dirt and pollen is in the air. It's that time of year here in Florida. The pollen is absolutely horrid for a few weeks in the spring. I think the forecast is in inches.