For heat pump water heaters using ventilation exhaust air, indoor air or brine or water as the heat source, how to fill in the data for the colder and warmer conditions?

In the case of heat pump water heaters using indoor air, exhaust air, brine or water as a heat source, there is no possible differentiation according to climate conditions. However, to determine the efficiency, different loads might apply.

As such, the efficiency for each 43 climates could be different and in this case, data for use of climate zones is needed. In cases where there is no differentiation between climates, all 3 fields can be filled with the same values.

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