oh god, yuck. I would freeze to death. Are you doing wood heat or space heaters or??
We were originally thinking we'd put in underfloor heating (electric, not water-filled), but lately, we've been rethinking that. Now we're trialing a far-infrared panel to see how well it heats... If it's enough heat, we might go that route instead, just because it's easier to install and if maintenance needs to happen, we'd be able to access it without ripping up the floor.
And we'll have a wood stove in the lounge.
Edit: Oh, you mean NOW! Hahaha! Um... we have three small electric space heaters (two fan ones, and one radiant heater in the bedroom) and we recently picked up a far infrared panel that we'll be trialing this year.