[Equest-users] Two stage furnace curve, roof top unit

Jones, Christopher cjones at halsall.com
Thu May 28 07:07:52 PDT 2015

Has anyone come across a part load furnace efficiency curve for two-stage furnace heating?  The roof top unit I am looking at has a full load efficiency of 80% and a low stage (60%) efficiency of 81.4%.  Looking in the eQuest library there is only one furnace HIR curve - on-off.

Christopher Jones, P.Eng.
Tel: 416.644.4226 • Toll Free: 1.888.425.7255 x 527

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