What is the minimum supply air in CFM per ton of cooling required for a domestic air conditioner?

In residential air conditioning systems, the minimum supply air required is typically calculated based on the cooling capacity of the unit, often expressed in tons. The standard minimum supply air requirement is around 400 cubic feet per minute (CFM) per ton of cooling. This value ensures that there is adequate airflow to effectively cool the space while also maintaining comfort and efficiency.

The choice of 400 CFM provides the right balance between ensuring sufficient cooling and enabling effective removal of humidity from the air. If the airflow is too low, the system may not cool efficiently, leading to uneven temperatures and uncomfortable humidity levels in the home.

Understanding this standard helps HVAC professionals design systems that meet both the cooling demand and the comfort needs of residential occupants. This aligns with industry practices and is part of the guidelines set forth by organizations that focus on HVAC system performance and efficiency.