I don't know if will move enough heat.
I actually tried something kind of like this once, where I tried to indirectly heat the coolant with warmed air. I took 2 space heaters, plugged them into my out door welding receptacles and ran extension cords to my car where I put both heaters on the passanger side floor.
The idea was to put heaters in the cab, direct them towards the vehicle air recirculater intake and use the heat to both thaw the ice and warm the engine a little faster with the engine running.
It thawed the ice but appeared to have almost no noticeable effect warming the engine.
This one of the reasons I have abandoned trying to air as a medium to heat anything beyond the inside of the cabin.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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