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furnace sizing

Tomahawk Member Posts: 2
Does anyone have a simple scale for sizing furnaces for residential use


  • icesailor
    icesailor Member Posts: 7,265

    Easy as pie.

    If it's a hot water system, do an accurate heat loss calculation of the structure. Sizw the boiler accordingly.

    If it is an existing steam system, measure up all installed radiators, compute the EDR of the radiatiors, and size the boiler to the EDR.

  • Tim McElwain
    Tim McElwain Member Posts: 4,556
    Tomahawk are you looking

    for boiler sizing or Forced Warm Air Furnace sizing?
  • EddieG
    EddieG Member Posts: 150
    Scortched Air

    If it is a furnace, you need to preform a load calculation (Manual J). Also duct work sizing and design is very important. A Manual D is used for duct sizing and design.
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