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Themia Heat Pump running cost email

This was an email i sent a client after i service his Thermia Diplomat Heat Pump.   Just to send on as promised a calculation for your running costs to date. Run time in hoursThermia Heat Pump Heat pump hours: 14,456hrs Add heat 1 hours: 186hrs Add heat 2 hours: 239hrs Input in kW Heat pump: 2.9kW Add heat 1: 3kWAdd heat 2: 6kW Total kW/hrs14,456hrs * 2.9kW = 41,922 kW/hrs  239hr s * 3kW = 558 kW/hrs 186hrs * 6kW = 1,434 kW/hrs Total: 43,914kW/hrs Now depending on the average that you had be between day and night rate on your bills, I'll take an average rate of 12 cent per kW/hr. This average may be higher in your case as it wasn't set up right. Date rate is currently 16 cent and night rate is 8cent. Total cost 43,914 kW/hrs * €0.12/kWhr = €5,269.   Since your heat pump has ran 12% of it's time for hot water, 88% of its time  for heating. You have spent roughly €632 on hot water over 6 years. €100 per year. If y o u installed solar then that cost would be €30 per year, saving €70 per year on hot water production. When I am in your area again I'll carry out the remaining reworks.

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