Where I grew up, a house had a boiler or a furnace of some sort for heating during the winter.
This was due to the very intense, long, cold winter we would experience up there.
At that time, I had not even heard of an HVAC heat pump. Plus, we just really didn’t need much air conditioning for the summer either. I bought a window unit a/c once one summer when we had a weeks long hot streak. However, there were other summers where I didn’t bother putting that air conditioner back in the window. No, the focus of our HVAC efforts were always the winter and we had serious HVAC equipment to combat the cold. So when I took a job further south, I just wasn’t exactly convinced that a heat pump would be sufficient for the winter. While we were further south than where I grew up, it wasn’t like we were south enough to enjoy really mild winters. This surprised me a bit when I asked about the gas furnace only to be told there wasn’t one. In fact, I was told by the realtor that any sort of furnace was sort of unusual. She had seen a few homes that had an old oil furnace in the basement. But by and large, all the heating and cooling in the area was done by the heat pump. So, I took her at her word but was still a bit unconvinced. That didn’t last long though. I was stunned to find that the heat pump was more than strong enough to bring plenty of heat to our home.