Bay boat remodel.

[sls4ak]

I have a sweet little 19' aluminum hull boat with home made cabin. What will I need to use to add a heater? Defrost and defog windshield would be nice, making the cabin a little warmer at night would be great.
Thanks for any and all feed back!
Scott

I am having difficulty down loading pics of my boat, further feedback would be appriciated.

[Frostbitten]

A Mr. Buddy heater and a 12 volt fan.