Solar thermal is not that bad. It is now March and the light is enough for the system to produce the shower water just for the two of us.
Really? Strange... I don't know what our landlord has installed on the roof (currently a south-facing roof), but there are 4 collectors and if I look at the statistics, they deliver about 1,000 kWh per year for hot water. That is about 7.5% of our total consumption of about 13,000 kWh.
There she is again... the energy saving ordinance "illogic"!
If I were to build new, I would make the effort and legally challenge the possibility of "exemption" that also exists in the energy saving ordinance. (At least I would dive deeply into this matter and try.)
According to Mr. Konrad Fischer, the energy saving ordinance CANNOT force you to install a technology that does NOT pay off within 10 years.
This regulation is allegedly also anchored in the actual energy saving ordinance.
That means; if you can prove that the extra expenses to achieve the energy saving ordinance standard compared to a "conventional construction method" do NOT pay off within 10 years, you can get an exemption.
And THAT it usually does not pay off within 10 years is not even doubted here in the forum.
(Google "Konrad Fischer and energy saving ordinance". It costs nothing but a little time. It's also interesting. One way or another.)
Let's see what slanders will pour down on me now...
:)
And what if you save on underfloor heating and heat pump and instead use infrared panels as the primary heating plus a tankless water heater and a photovoltaic system?