I do not know what styles are available, however the stand alone ones that look like old radiators are sealed steam heaters and you can also buy the small electric heaters in which you can physically see the coils and they blow air via a fan across the coils.

Personally you should just have a warm body to curl up with. If it is too cold for one get a second and snuggle up. Skin on skin is the best way to stay warm and transfer body heat.

A 3 dog night is darn cold but on that same evening a one woman night may cause perspiration.