Originally Posted by O.C.Diver
Also consider when doing your install, plumbing
the furnace in such a way as it acts as a preheater for your engine
. This is common on RV bus conversions in the North. They use a Webasto hydronic heater to heat the bus and also act as an engine
All I need is the circulation pump in the fresh water
circuit, in order to be able to transfer heat in the other direction -- from the Espar to the engine, to preheat it.
It's not a priority for me -- my Yanmar
starts without glow plugs even in sub-freezing temperatures, if I so much as squint my eyes at the start button. But I guess it would save some wear on the engine, having it warm before starting it in cold weather