North American sent me a $1300 brick and refused any warranty support at all. They only warranty if you can prove it was installed by a "service company" and only then if you uninstall the furnace, package it up, and ship it back to them. If you do all that the warranty is 50 % at most. They are a horrible company! Do not buy from them. Also the quality of the Reznor product was very poor including unfastened parts left loose in the combustion chamber. They also said I had to contact Reznor directly but they only support resellers.