coil & location of heat-pump unit sound fine ...
to measure performance, you need to measure water temperatures in & out of the heat-pump unit, air-intake temperature to the heat-pump unit (all usually read from the control panel), power consumption (kW), and water flow rates (litres per minute, through the heat-pump unit) - without a full set of all these, you can’t evaluate performance.
Heat transfer being the product of temperature rise and flow-rate.
Doing spot-checks manually might work but, because things inevitably go up & down all the time, would be very rough & ready - continuous data-logging into your PC would really be necessary, with it combining the data & plotting graphs for you to assess.
Power & flow-rate meters are available, giving a number of pulses per kWhr & per litre ...
to measure performance, you need to measure water temperatures in & out of the heat-pump unit, air-intake temperature to the heat-pump unit (all usually read from the control panel), power consumption (kW), and water flow rates (litres per minute, through the heat-pump unit) - without a full set of all these, you can’t evaluate performance.
Heat transfer being the product of temperature rise and flow-rate.
Doing spot-checks manually might work but, because things inevitably go up & down all the time, would be very rough & ready - continuous data-logging into your PC would really be necessary, with it combining the data & plotting graphs for you to assess.
Power & flow-rate meters are available, giving a number of pulses per kWhr & per litre ...
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