Here is what appears to be some kind of exhaust gas heated car heater...never seen anything like it...anyone know how this thing would work?
I'm having trouble envisaging quite how this works, actually, how to shut it off; sure I get passing coolant through it to 'superheat' the coolant, that would work real good!, you'd be cooking in no time....but how would you go shutting it down in , say, Summer?