Finally got my corn burner the other day . We live in a 1300 sq ft 2 story home here in Iowa . I went to Imogene Ag Inc. to look at the burners they had for sale , I just hate the thought of giving the gas company anymore $ than I have to ,but thats another story . We ended up getting the smallest unit they had , rated to 30,000 btu and large enough to heat 1500 sq ft . This thing is remarkable , on the lowest setting in 40 degree weather we almost have to ,and have open'd up windows , our only concern was the up stairs . So far it has been raising the temp on the second floor to an average of 72 degree's , with our gas furnace it would be doing good to get to 64 . We were some skepticl at first , but that is gone now , and with the support we have been getting from George and his people where we bought the thing it has been a great experience .