The Vienna system they are talking about specifically needs to concentrate the heat pumps at the source of the waste water. I read some article about it in the

The Vienna system they are talking about specifically needs to concentrate the heat pumps at the source of the waste water. I read some article about it in the local news and it was a ridiculously small investment for the amount of households it will serve. Because the waste water contains so much heat it will be a very cheap heat source operationally. I was actually shocked they’d rather burn gas given that is possible but either it just recently became so lucrative with higher COP or Putin just paid off too many people. I think half of Austrias ex politicians worked for some Russian entity or another before the Ukraine war