Max Velocity in Ducts
Max Velocity in Ducts
(OP)
Dear HVAC Experts:
What is the max desireable velocity one can size a duct for acceptable noise level ? Suppose the application is one where the ductwork is exposed in the conditioned space.
Thanks in advance for your help.
Seadogg
What is the max desireable velocity one can size a duct for acceptable noise level ? Suppose the application is one where the ductwork is exposed in the conditioned space.
Thanks in advance for your help.
Seadogg





RE: Max Velocity in Ducts
Recommended velocities, FPM
Residence:
Main duct: 700-900
Branch duct: 600
Schools, Theaters, Public Bldgs:
Main duct: 1000-1300
Branch duct: 600-900
Industrial bldgs:
Main duct: 1200-1800
Obviously the duct velocities for the residence will give
the least noisy duct. You have to balance the cost against
the lack of noise.
Branch duct: 800-1000
RE: Max Velocity in Ducts
Recommended velocities, FPM
Residence:
Main duct: 700-900
Branch duct: 600
Schools, Theaters, Public Bldgs:
Main duct: 1000-1300
Branch duct: 600-900
Industrial bldgs:
Main duct: 1200-1800
Branch duct: 800-1000
Obviously the duct velocities for the residence will give
the least noisy duct. You have to balance the cost against
the lack of noise.