vladfloroff;4585339; said:You could build a small DIY solar heater. Then adjust the circulation based on temp. This is probably the cheapest but requires some DIY skills.
yzf450motoxrider;4589869; said:solar??
Am I the only one who thinks the overhead cost of building a solar setup is going to be more expensive than buying a 300w heater and forking out a few bucks a month toward the electric bill?