The answer to 'price of new heat exchanger' is that the cost can vary widely depending on several factors. In general, a new heat exchanger for a residential HVAC system can range from $800 to $2,500 or more, installed. The exact price will depend on the size and efficiency of the unit, the complexity of the installation, and your local labor and material costs.
Some key factors that influence the price include the brand, model, and capacity of the heat exchanger, as well as whether any ductwork or other components need to be replaced during the installation. The age and condition of your existing HVAC system can also affect the cost. It's important to get quotes from multiple local HVAC contractors to find the best price for your specific needs.