Murdock,
I've pulled my recirculating heater from my 52' to repaint it. My neighbor has a fresh air on his 49'. I like his. Want to trade? My core drains(blows through) good. Fan works great. I've repainted it a darker forest green. The fan is just primered and I haven't touched the motor...yet.
Let me know what you think. jeff
If you are interested, look at you firewall from the engine compartment on the passenger side. You should see two (2)5/8" or 3/4" holes vertically alighned about 8" apart. Thats where the hoses run through.