Heating sources include heat pumps, heat strips, baseboard heat and Webasto/Aqua-Hot. Heat strips and baseboard heat are resistive heating sources and tend to use a good amount of power. Baseboard and Webasto/Aqua-Hot heat are both located where heat should be, at the floor. Heat pumps are temperature limited. Below 25-30 degrees they don't produce much heat, below that they don't work.

There's nothing wrong with any of these sources. Almost all, if not all, have Webasto/Aqua-Hot and one other heating source. Unless it's just a chill I'm getting rid of I use the Webasto/Aqua-Hot.