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Indirect radiators

found in basements,usually covered in wood and ducted to the outside . Of course no longer ducted outside . The EDR is usually noted by the size of the feed . Anyone know the edr of 1 1/2 & 1 1/4 pipe 


  • EDRs

    Jim - The following are EDR capacity for1 pipe steam laterals:

     1-1/4" - 55 EDR

     1-1/2" - 85 EDR

    Taken from Page 3 of the Burnham Heating Helper. I 've attached a copy.

    - Rod
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