Not a heatwave

Last ten days I have been walking the puppy and trying to keep the house warm. There is finally a decent winter after all the lousy years. That also means temperatures keep low, today has been coldest day so far, -17℃.
I usually rotate between heating kitchen stove and the big heat-storing fireplace, but because the cold I have to lit a fire every day to the big fireplace. And that means I have to keep hauling firewood inside. Now I'm up to two loads of wood, if weather keeps getting colder I might have to succumb to increase electric heating. And then of course there is the woodburner in the extension, but it needs only a half load of wood for the whole day (ant that could count also as a heat-storing system, because chimney is two stories tall and the damper is right next to the ceiling on the upper floor, so when the chimney has warmed, it gives warmth on both floors.
Heating the house during cold winters isn't about convenience, it is about keeping all systems operational. If I'd let the house get cold, I might end up with frozen waterpipes and drainage, and maybe even with some structural damage/water damage or moisture inside walls (I'm not talking about some condensation on the windows).
'Suma is a bit bored, she can't take long walks because of the cold. Yesterday we tried our basic route, but even wearing a shirt she was shivering half way and I had to pick her up and wrap inside my shawl. So short walkies.

So. It is cold and my polytunnel has collapsed. Darn.