Does a heating climate require less air to cross an evaporator coil compared to a conventional furnace's heat exchanger?

In a heating climate, the system operates in a way that often necessitates a larger volume of air to pass over the evaporator coil than what typically passes over a conventional furnace's heat exchanger. This is because the efficiency of heat exchange in a heating system relies on the ability to distribute heat evenly throughout the space being conditioned.

Heating systems, especially those using heat pumps, require a specific airflow rate to ensure that heat is efficiently absorbed from the refrigerant in the coil and transferred to the indoor space. If less air crosses the evaporator coil, it can lead to inadequate heating performance and potential frost buildup due to insufficient heat exchange. Therefore, in a heating climate, the amount of air required to effectively move heat through the system can actually be greater than that required by a traditional furnace's heat exchanger, which typically focuses on more direct combustion for heating rather than utilizing refrigerants.

Overall, the nature of heat exchange in heating systems dictates that airflow requirements do not diminish in warmer climates and may even increase depending on the efficiency and design of the system.