When I was a kid, my parents had a space heating system downstairs in the residing room.
It was cold all of the time while in winter.
The condo did not have actually great insulation, and sporadically there was ice inside of the condo on the window. There was never any snow on top of the condo due to the loss of heat. The roof was really warmer than the rest of the condo due to heat rising. Snow frequently melted off the roof and ended up down on the ground. My friend and I had a lake of water in the front yard. My parents used space heaters to keep the condo warm. There was a space heating system in the residing room. The space heating system was one of the immense machines that had orange coils that get seriously hot. One time my sibling touched the coils and she ended up with a immense burn on the back of her hand. On one certain night, everyone was asleep. Our dog was downstairs as usual, however this time she decided to get into mischief. The dog was playing around and accidentally knocked over the space heating system in the residing room. No one knew about the accident until the carpet caught on fire. My parents woke up in the middle of the night when they stinked smoke. My friend and I did not have any type of smoke detector or fire alarm in our condo back then. My friend and I got out before anyone got hurt and my dad put out the fire before it burnt down the whole house. That was one of the scariest situations that I have ever faced in my whole life.