My search skills aren't giving my any results that show this, but it seems to me like a hydronic heater with some valving could feed the rear hvac unit that comes factory from some of the vans. Might have to modify the wiring a little to get the fan to come on without ignition power.
I was initially pretty set on having an air diesel heater, but the idea of having one that can also preheat the block on cold days is pretty appealing as well.
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'06 EB 350, Advanced 4x4, 6.7 Cummins + Allison, 24" bubble top.
'05 Pleasure Way Excel TS V10, still boring and 2wd
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