Re: Winter Moisture Control
I lived aboard in Wash DC and Annapolis for three winters on an Ericson 30 (headliner with just an air space for insulation), and kept the boat comfortable with two 1500 watt forced air heaters. No condensation.
I think the key is keeping the air moving with hot air, when you heat the air it reduces the humidity. Radiant heaters don't reduce the humidity. Stay warm.