Also, you can use heat pumps with poor insulation just like you can use traditional heating solutions with poor insulation. It's just that you will need a large

Also, you can use heat pumps with poor insulation just like you can use traditional heating solutions with poor insulation. It's just that you will need a larger system that wastes more energy. Whether that's still worth the trouble in terms of cost of course depends on your current situation of course. But it's not like heat pumps stop working because of your insulation. They just get more costly to operate. And especially the smaller systems can only deliver so much energy to your house. Basically, if you multiply the maximum output by three, that should be above whatever you are currently using to heat your house during a really cold month. If it's lower, it's not big enough.