Mike-

I've got a bigger everest furnace and the only issues I've had with
heat hasn't been the heater, it's been the propane tank. The
horizontal tanks work fine in the winter I've used mine till -15. The
problem is often due to the small size of your tank and it running
out. If you try and use a more vertical BBQ with an extend a stay
outside I've found it won't work well even as high as the 30's. You
can however put the tank in the driver side foot well and then your
good.

JFF

On Jan 30, 2008, at 8:15 PM, Mike Collum wrote:

How low can the outside temperature go (outside westy propane tank) and
a propex furnace, at or near sea level, still operate?

Mike