The answer to 'should I get heat exchanger or' is that the decision depends on your specific HVAC system and needs. A heat exchanger is a key component in a furnace that transfers heat from the combustion process to the air being distributed through your home. Compared to a traditional furnace, a heat exchanger can provide improved energy efficiency and better indoor air quality.
Some key factors to consider when deciding between a heat exchanger or other HVAC options are the age and condition of your current system, your home's size and layout, your energy efficiency goals, and your budget. A professional HVAC technician can assess your situation and recommend the best solution, whether that's upgrading to a new heat exchanger or exploring alternative heating and cooling systems.