I am shoping for a indoor wood fired boiler. I have looked at Greenwood and orlan. Then I saw the Royall 6130 and the LiL' powerhouse on ebay for half the cost of the other 2. I am sure there is a reason but can someone clue me in on what it is. b.t.w. It was -55 here two days ago and I am gonna go broke buying heating oil.