I have manufactured a product which controlls the ammount of energy used in the pre-heating of both diesel & gas powered engines, This device saves the end user over $250.00 in electric cost consumption in a 120 day period.
My web site is engineblockwarmingcontroller.biz
I do have a patent on this device it is fully insured and uses all U.L. approved electronics. and can prove to the end user it is a genuine energy and fuel saving product incorporating re-cycled material in the mounting board.

this is a new product and has not yet been able to be recognized as a "Green" product as it is out of the normal range of their guidelines.