The answer to 'how much does heat exchanger cost in my area' is that the cost can vary significantly depending on several factors. In general, the cost of a new heat exchanger for a residential HVAC system can range from around $1,000 to $3,000 or more, installed.
Some of the key factors that influence the cost include the size and efficiency of the unit, the complexity of the installation, and your local labor and material costs. Larger or more high-efficiency models, as well as units that require more extensive installation work, will be on the higher end of that range. It's important to get quotes from local HVAC contractors to get an accurate estimate for your specific needs and location.