Hello, first post but long time lurker. I am supposed to pick up an insert that I found on CL tomorrow am. It's a "Nu-tech catalyst" insert. Guy said he used it for the last five yrs and had no issues heating a 2400sq ft home. It has a blower and it appears to be in good shape. a web search turns up very little on this maker. anyone out there have any info? Likes, dislikes etc. For $100 and gas I don't think its too bad a deal but, I don't want to install a nightmare that I will regret. Thanks!