Calculating Pipe CFM of Air

 

Cubic Ft of Air in Radiation

      

Radiator 

Cu. Ft. Per Sq Ft 

 Cast-iron wall

.028 

 Cast-iron column

.025

 Cast-iron tube

.013

Cast-iron thin tube (newer Style)

.009

 Cast-iron radiant radiator

.008

 Cast-iron baseboard (9" high)

.07

 Cast-iron cabinet convector

.0003

 Unit  heater      

.0002

It may be required to use more than one main line vent per steam main in larger systems.

Multiple Main Line Vents

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