Parent was just giving you an example.He was asking you to open your mind to other solutions. Of course you could also save energy and since you guys are all buring oil/gas to warm your houses, how about this observation of a small town in the UK:
When I was looking to rent a house in Cheshire a few years ago, a lot of the ads mentioned "double glazed windows" as a selling point. Imagine that! A house with a bit of thermal insulation, in a country where the temperature will often drop to 0 C / 32 F during mid-winter?
Also, every house we looked at had a gap of at least one centimeter under the entrance door, where cold air could enter, and they all had (funny but true) a form of stretched out pillow to put there, in order to reduce the drag. When I first got there I had to buy a fridge since it was not considered a "fixed appliance", but until I got that sorted, I actually stored my butter and milk in the hallway since it was so cold.