Eberspächer...using when not on boat!!

It's simple, like a car heater. Take the air from your cabin, reheat it and feed it back in, then you get your windows steamed up.

You get warm quicker though, but then you need to bring the air in from outside once you are warm. Not too practical with an eber, so stick with the manual and take it from outside.

Danger of poisoning is probably the same whatever you do.

Pops
 
Page 7 is heater components diagram /forums/images/graemlins/tongue.gif

anyway, all it says is
Heater Location
Depending on the type of vehicle, the best location for mounting
the heater will vary. Typically, air heaters are mounted
inside tool or luggage compartments. However, the heater may
be mounted anywhere inside the vehicle provided you adhere
to the following conditions:
• Combustion air intake, exhaust and fuel inlet must be
located outside of the vehicle.
• Heater must be mounted on flat horizontal surface
providing an air tight seal between heater and vehicle.
• Do not mount the heater outside the vehicle, unless care is
taken to protect the heater from the weather. When selecting
the location, consider the following:
• Combustion air and exhaust connections.
• Ducting.
• Fuel line connections.
• Electrical connections.
 
Yes, but looking through the manual it doesn't say you can't circulate the air from inside, so I think Sonsy Lass is probably right. I may have been thinking of the combustion air intake. Or the manual has changed in the last 4 years. Still I wouldn't do it from the point of view of increased condensation from breath/body. I also wouldn't leave the heater on while I'm away because of potential malfunction causing a fire.
 
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