I use a furnace to take care of our heating in the cold winter months of the year! I would much rather have a gas furnace than a central heating plus air conditioner appliance.
As a matter of fact, our a/c is entirely provided through 2 window a/c appliances.
I know that central heating plus cooling is just too pricey to run. I had it once a long time ago in a lake dwelling I was renting when I got out of university. And I would never ever get central heating plus a/c for my own dwelling. I actually decided that after seeing the terribly high electric bills because of it! But let me tell you, I had an electric furnace that lately has been giving me those same high electric bills in the cold season. Because of it being electric, it is undoubtedly no different than a central heating plus air conditioner appliance. But it does save a little cash. I made the choice I was going to get rid of the electric furnace for this reason plus get myself a nice gas furnace instead. Yes I suppose you are thinking “is this man crazy?”, although I am not afraid of gas products in the least. I easily know how to take care of them plus how to make a gas furnace completely safe. The removal of the electric furnace plus the installation of the new gas furnace was undoubtedly pricey plus was a substantial thing. I had to take off from my place of work to have it done. But when it was all eventually finished, our dwelling was heating just as wonderful as the electric furnace was!