I've got 4 Trojan t105's (and ha, plenty of blankets) and can run the furnace for awhile but I'd rather not use something so brutally inefficient when boondocking, especially when there's no sun for a day or two. And I should probably mention that I don't have a generator, just pure solar. With that setup if you're somewhere cold with not much sun for a couple of days you're pretty much guaranteed to run out of power if you're using a blower, no matter what batteries you have.
But no biggie since catalytic heaters seem to work great.
But sure would be nice to figure out some way to use a smaller blower, maybe routed to just one or two vents. Of course would need to make sure the heater can't overheat.
