Is there still a need for a solar system at all with air-water heat pumps and photovoltaics?

2019-12-17 21:13:23

To avoid constantly heating the water inefficiently to 60 degrees, many heat pumps can also run a Legionella program, for example once a week. The rest of the time, the temperature is kept around 45 degrees.

The program will then probably heat the water briefly and long enough against Legionella to 60°, or what does the program do / achieve?

2019-12-18 06:21:11

Exactly that. However, we have not activated it, for example.

2019-12-18 09:00:59

just shower 5 minutes longer. same effect, cheaper, more fun.

2019-12-18 10:37:37

just shower 5 minutes longer. same effect, cheaper, more fun.

to always use up all the water completely and thus wash away any Legionella contamination.
Yes, I need to find out which volume for hot water is best to plan.

2019-12-18 10:54:21

You just have to do a bit of googling. You can find several studies, I even believe from [Frauenhofer], that show there is no legionella problem in single-family houses.

2019-12-18 10:57:42

But the risk with a single-family house is rather very low, isn't it?

Yes, I already said that it is very low. But never say never Who knows if it was taken into account at Frauenhofer that nowadays very low flow temperatures are often set. Maybe they also assumed > 60°C?!

Is there still a need for a solar system at all with air-water heat pumps and photovoltaics?

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