You could also get a zoned heating and air conditioning plan but you better have a ton of money to spend and be well off financially.
When you have an overly cold home there is no need to have to crank the heck out of your central furnace. But, there is one system you can use to keep those electric bills down and get your home to nice and warm. Buy a portable space furnace and run it on the very low setting while running your central heating plan how you normally would. You do not have to crank that thermostat anymore! The heating from the portable space furnace on the very low setting will make it so that the heat from your regular HVAC unit and the space heater work together to warm up your home. You could also get a zoned heating and air conditioning plan but you better have a ton of money to spend and be well off financially. Zoned HVAC are far from cheap! They are nearly double the price of what a regular residential heating and air conditioning plan is. So my advice to you is to do what I am saying and get yourself a portable space furnace to help heat your overly cold home with the warmer temperatures. The reason for overly cold homes most of the time is because there is something off with the build of the home or the general air flow of the central HVAC unit. But a portable space furnace can assist in making it so you do not have to go crazy trying to warm up your home.