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Heat Pump Balance Point Calculator

Balance point from load line and capacity lines.

Inputs

Inputs and assumptions

Manual J load at design temp.

ACCA Manual J 99% design temp.

Heating setpoint.

Spec capacity at the cold test point.

Lower rating point, often 17 or 5.

Spec capacity at the mild test point.

Upper rating point, usually 47.

Result

Balance point (F outdoor)
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What to check

  • Manual J design load and temp
  • Spec capacities at two rating points

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