Hello,
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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