here in the US Pacific North West (Tacoma WA) it is about 33 outside right now,,, and all most 80 in the boat. (Ilive aboard a boat here) and I am very greatful for the warmth. Cold and I do not get along,,, lol. As the boat sits in the water which is about 50F all year round, I use the cooler air from the bottom rooms to cool the upper rooms. And when i use the heat, I use the same blower system to send the warmer air down to the lower rooms. Works very well. *S* I use wood heat sometimes, and mostly the diesel furnace. For the cooking and dryer and hot water I use propane.
Yes it is romantic living on a boat,,, till it is stormy and yah need to take the little shore boat in to get groceries of other needs,,, then it is a real adventure at times. LOL The boat is too big to tie to the regular marina docks, so I have it out on what is called the breakwater. Minimal power and I have to run my own phone line underwater for the computer link, but it is VERY private out here.
Hope every one can stay warm in the winters and cool in the summers,, "Warmest hugs",, grins
Norval