Whether or not you should replace your existing gas furnace with a heat pump depends on a number of factors, including the climate where you live, the size of your home, and your energy needs.
In general, heat pumps are more efficient than gas furnaces, so they can save you money on your energy bills. However, heat pumps may not be the best option for homes in cold climates.
If you are considering replacing your gas furnace with a heat pump, it is a good idea to talk to a qualified HVAC technician to get their recommendations. They can help you assess your needs and choose the right system for your home.