We have a Newport diesel heater taking the damp and cold out of a 50' boat. Works wonderfully. Granted, the winter here hasn't been horrible this year, but we had to wear mufflers, sweats, a jacket, hat, and gloves on July 3. A few warm days in fall and spring, mostly blowy and cold. I also recommend oil lamps for added heat, though they don't help the damp at all--in fact, they add to it. Next week we head south toward Mexico. Yea!