Whoops I misread that. I thought I read it had it's own heating element. I do have access to a webasto at the moment that would be used for a road engine. That would work the same basically as having an engine plumbed in.
24K BTU will melt your hood, no problem keeping up with that thing.Standard heaters for a cargo are usually 8-12K BTU, mine is 16K and makes water inside within minutes