I have been at this since I was 22 i am 42 now, Have serviced units, installed units, Sold units, Any questions about burning waste oil through a low pressure, atomized type burner I can help. You can E-mail me at rhsauto@yahoo.com, I am a Current Factory Rep for a Single brand of Waste-oil heating system. I am not here to sell Units, so I won't mention which brand, But i can help with questions, laws, and other things in regard to burning used Oil. I believe that we can help out our enviroment quite a bit by using these units.