ᐅ Air-to-Water Heat Pump: Current Consumption and Data

Created on: 29 Sep 2020 11:06
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Bookstar
Hello!
I'll start.
Heated area 200m2 (2,153 sq ft)
KfW 55 standard
Mechanical ventilation with heat recovery
Current outdoor temperature 6°C (43°F)
Heating energy consumption including hot water 35 kWh
Electricity consumption 9 kWh
COP 3.88
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RotorMotor
2 Nov 2021 10:59
Deliverer schrieb:

I think Alessandro is right: If the circulation pump is off, you end up with a long pipe full of stagnant water. And more important than high temperature is high flow rate.
That is unfortunately incorrect! High flow rate only helps if the water is actually flowing out. Circulating in a loop creates risk rather than benefit!
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Malz1902
2 Nov 2021 11:12
Is it effective to flush the system once a week at 70°C (158°F) for Legionella prevention?
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Deliverer
2 Nov 2021 11:16
RotorMotor schrieb:

That is unfortunately incorrect! Flow rate only matters if the water actually drains away. Circulating in a loop creates risk instead of added value!
Yes. Okay. But you also shouldn’t leave it standing in the pipe...
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RotorMotor
2 Nov 2021 11:25
Deliverer schrieb:

Yes. Okay. But leaving it standing in the pipe is not a good idea either...
However, just circulating the water in the closed loop will not kill Legionella as long as it remains within the same closed system.
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Deliverer
2 Nov 2021 11:27
No, of course not. Although with sufficient speed, friction heat will of course be generated... ;-)
KingJulien2 Nov 2021 11:38
Are you suggesting that having no circulation at all is more hygienic than occasionally running the water?

For reasons of efficiency and the "don’t-need-it" principle, I would happily do without it entirely.