Hmmmmm.... Funny how when an EPA accredited lab tests an OWB gasser their findings are considered "a farce at best and fraud and the worst", but when a mass storage unit is tested by one of these same labs the results are accepted as gospel truth. Then you have a particular dealer stretching the EPA's findings(as posted by Garn). All I can say is "buyer beware when purchasing one of these units". Go with something that sits outside for a "no muss no fuss installation". Buy it once, install it right, operate it properly, keep the mess and fire hazard outside, and be done with it for 20 years!