Simultaneous Heating & Cooling

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Hi Folks:

I have modeled some PTHP with variable speed compressors.

I am getting simultaneous heating and cooling during the winter months. See attached spreadsheet.

I have not specified humidity control and the throttling range is .3. The heat set point is 72 and the cool set point is 75.

Any ideas?

Thank you,

Paul Diglio

87 Fairmont Avenue
New Haven, CT 06513
203-415-0082

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