What size supply duct for 2.5 ton ac unit?

For a 2.5 ton AC unit, the recommended supply duct size typically ranges from 8 to 12 inches in diameter, depending on the specific design and layout of the HVAC system. A common rule of thumb is to allow for about 400 CFM (cubic feet per minute) of airflow per ton of cooling, which translates to approximately 1000 CFM for a 2.5 ton unit. The actual size may vary based on factors such as duct length, material, and the number of bends or turns in the ductwork. It's advisable to consult with a professional HVAC technician for precise calculations and recommendations tailored to your specific system.