Select the efficiency of the heat pump from the drop down menu.
1.Enter the nominal tons and backup heating type.
2.If electric backup is chosen, the program assumes that the heat pump will be used for all of the heating needs with electric heat coming on when necessary. If a fossil fuel backup is selected, a cut off temperature must be entered to tell the program the outdoor temperature at which the compressor will be turned off, and the backup heating system will be allowed.
3.Select the hot water type from the drop down menu.
4.Click the “Calculate” button to review the equipment sizing and operating costs.
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