Product review (5 stars): Great Product Idea!
I found out about this item from a friend of mine who used to rent houses out to people.  My basement is not finished (yet), so i have no need to heat it.  Only problem is that the cold air makes its way to the first floor of the house and makes the floor cold.  So, this is the first winter we are using it.  It does a great job of heating the basement and makes the first floor warmer than usual.  Why heat your city when you can use that same heat to heat up your basement/house.  Plus I love how you can take off the screen to clean it.  Also, the lever to send the heat outside during the summer.