The answer to 'how much to replace heat pump' is that the cost can vary widely depending on several key factors. Generally, you can expect to pay anywhere from $3,000 to $10,000 or more to replace a residential heat pump system.
The main factors that influence the cost include the size and efficiency of the new heat pump, the complexity of the installation, the brand and model, and the labor rates in your local area. Older or less efficient systems tend to be on the lower end, while newer high-efficiency models can be on the higher end. Additionally, if the existing ductwork needs to be modified or replaced, that will add to the overall cost.