The answer to 'how much to replace heat exchanger in my area' is that the cost to replace a heat exchanger can vary significantly depending on several factors. The typical range for a residential heat exchanger replacement is generally between $1,000 to $3,000, but the actual cost in your specific area may be higher or lower.
The key factors that influence the cost include the size and model of your HVAC system, the complexity of the installation, the labor rates in your local market, and any additional repairs or modifications needed. It's important to get quotes from multiple licensed HVAC contractors in your area to get an accurate estimate for your particular situation.