Ive got an older El Diablo that Ive been using for years, and I really like the system. Due to a fire (not sure how it started) it looks like I'll be shopping for a new system. Has anyone had any experience with the heat exchanger El Diablo? Can I get similar heat with heat exchangers? I would like to move away from the fuel fired heaters and Im looking at the El Diablo with heat exchanger and just started looking at the different Sapphire systems as well. Any input is appreciated