cooling mode is between 350 and 400 CFM. Heating season airflow requires approximately 65 percent of the airflow needed for cooling. Therefore, to ensure there’s adequate airflow for both cooling and heating, use the high-end threshold of 400 CFM when referencing a duct sizing chart CFM ...
The chart below can be used to estimate velocities in air ducts. The default values are for air flow 400 cfm (680 m3/h) , duct size 8 in (200 mm) and velocity 1150 fpm (5.8 m/s) . Download and print Air Ducts - Velocity Diagram! Air Ducts Friction Loss make 3D HVAC models with...
EXHAUST DUCT VENT FAN SIZING CHART [PDF] from CaptiveAir Products, 4641 Paragon Park Road Raleigh, NC 27616 USA Tel: (919) 882-2410 Toll Free: (800) 334-9256 retrieved 2018/08/30 original source: https://www.captiveaire.com/CATALOGCONTENT/DUCTWORK/doc/Duct%20Size%20CAS.pdf?v=3072018 ...