With cold weather upon us I'm thinking about adding a heater to the Saltare. I normally push through mid-late October but this year I have a good 4/3 suit so I'm thinking late November, maybe December.At that point I'd likely be draining the block and manifolds after each session, but such is life. A heater would make it a lot more pleasant. The heatercraft units look decent but are around $400 (I think) for a 3 outlet. I'm thinking it wouldn't be hard to buy a heater core and make a box out of sheet metal. Would have to figure out a blower motor, and I'm sure I can come up with some hose to attach to the box to make a few outlets/hoses to use.

Has anyone done this before? The biggest uncertainty is a blower motor and how to mount it. I was considering scavenging something from a car out of the junkyard for a motor and wheel/housing to push air. What do you guys think? Any cheaper off the shelf units? Try building it myself? Just considering options and cost at this point.