The answer to 'best air handler' is that the best air handler for your home depends on factors like the size of your home, your heating and cooling needs, and your budget. In general, a high-efficiency variable-speed air handler is often considered one of the best options for most homes. These air handlers are designed to run at different speeds to match the heating or cooling demand, which can save you money on your energy bills and provide more consistent comfort throughout your home.
Variable-speed air handlers are also quieter and better at controlling humidity levels compared to single-speed models. When selecting an air handler, it's important to work with a qualified HVAC contractor who can properly size the unit for your home and ensure it's installed correctly.