Usually keep my boat in 3rd car garage but built an out building. Has concrete floor and power but no heat this year. Ran out of money. I bought a heat lamp with a 250 watt bulb. I put the cover on boat and then a tarp over the back half almost like a tent. I put the heat lamp back by the motor and it really warms up everything. I could not believe it. Thought I would just pass this inexpensive way to keep your toy just a little warmer and you can continue to use it all year long without worry.