There's quite a big market for this, such as a lot of the Nordics, where -15C for a few days is common enough that not having heating then would rapidly become

There's quite a big market for this, such as a lot of the Nordics, where -15C for a few days is common enough that not having heating then would rapidly become an issue as homes freeze quickly. At those temperatures you have heating on 24/7 to keep the cold at bay. Electricity costs on those cold days are indeed high due to the constant demand of heating.