KFW70 with gas condensing boiler + solar hot water + chimney

Hello Thorsten,

just for the sake of completeness; the primary energy factor for electricity has been 1.8 since 2016


Construction expert on the go

Hello Thorsten,

just for the sake of completeness; the primary energy factor electricity has been 1.8 since 2016


Bauexperte on the go

Bauexperte, many thanks for this info, I thought it was still around 2.

I will remember the current value!!!!

Best regards
Thorsten

Since everything about the types of heating has been written for now, I am now interested in why, with planned heat recovery, there should additionally be a chimney. Cosiness or heating power support?

Hi,

in a quite well-known, nationwide non-boulevard Sunday newspaper from today, 24.04.16, there is a very critical report about air-to-water heat pumps in the finance section (page 43). Many facts are mentioned that are certainly correct and may apply. Of course: specially incorrectly adjusted/dimensioned systems are cost eaters. We also had such a case in a distant circle of acquaintances. It could be fixed.

Nevertheless, I stick to what I wrote above. Everyone according to their taste.

Every builder must take care of their heating system. If I had not optimized my gas condensing boiler myself (with long study of the manuals), it would not work so well either. You have to observe and, if necessary, intervene yourself or with a specialist if something is not working properly. I also once needed help with thermal solar, which did not work well (the water was first cooled when the system started). Here the specialist helped to make it usable. I could not adjust it myself.

Best regards
Thorsten

In our circle of acquaintances, there is a heating engineer who has been tied up in court for months. The air-to-water heat pump he installed does not properly warm the house and then relies on the auxiliary heating rod. However, the homeowner insisted on having this particular air-to-water heat pump for his old building, against expert advice! Unfortunately, the jack of all trades does not exist. Therefore, I can only advise to gather information carefully.