12 Volt heaters Options

[Tom]

Hey, has anyone ever tried to use these small heaters to keep the wind shield defrosted and to provide a little warmth on those chilly mornings? If these would work, no more heat exchangers and ducting. Wonder what we could lose in weight and what could be run through the tubes instead of hot air?
Just wondering,
Tom

[lapuwali]

It has been asked, but as far as I can remember, there's no definitive answer. The heat these things put out is pretty small, unless you get a big unit that draws a lot of power. The stock 914 alternator only puts out 55amps, and the wiring to the dash area is mostly sized to carry the (heavy) loads imposed by the lights, without a lot of headroom.

So, mounting a big one so it blew into the side tubes wouldn't be the "hot" ticket (sorry), but mounting a smallish one inside the fresh air box below the windscreen might work. You'd really want to run a dedicated power wire of 10-12g and a relay. It doesn't take much to demist the screen, but you're not going to keep yourself all that warm with such a setup.