No, please more of this!
Those times are over when you can say "Cold -> crank the heating to 5 and all is good." As long as energy is an expensive and scarce commodity, it must have a stronger presence in our awareness. It starts with an efficient design and operation of the heating system. "flow30" is a keyword worth googling. I don’t know if since the war there has been a change of mindset, but until a few months ago, in my impression, gas was still the standard for many heating installers. It’s just easy and... "that’s how we’ve always done it." Maybe there was a crash course on heat pumps once, and since then... if you really want it... :rolleyes: you just get some heat pump thing. Oh, there are things to consider like pipe spacing, pressure losses, volume flows... But we just design everything as cheaply as possible (cheap for the installer) and give the client a 1000L buffer tank for his 8m² utility room. Because the house apparently doesn’t have enough thermal (storage) capacity with 16 tons of screed yet. That one ton of water then totally compensates! Then you don’t have to keep the pipe spacing that tight; volume flows and hydraulic balancing aren’t really topics anymore...
I’m getting exactly that installed in my house. I couldn’t choose, because the general contractor commissions the electrician and he... drumroll... has always done it that way. I tried to talk him out of the buffer tank, but no no no, it has to be that way, no other option, it’s that or nothing... Considering that I can’t choose the electrician myself because of the GC and on top of that probably wouldn’t find another one these days, especially not within a few weeks... I guess I have to swallow the bitter pill.
It just annoys me, you could probably make the whole system about 20% more efficient and even omit technology (buffer tank and room thermostats). You would even be cost-neutral on the purchase price. The point is, the installation would be more work for the technician. It’s easier to just put a buffer down and be done with it. The customer pays the electric bill anyway.
I agree with you on all points. For 90% of installers, a heat pump is still "new territory" and the adjustment or optimization is very time-consuming and costly.
If you consider that alone in 2022 (as of last week) over 600,000 BAFA applications (and we are just at the beginning of September!) were submitted with a volume of €12 billion for energy renovation in the field of heat generators (i.e., new builds are not even included here!) and the installers have to deal with this (consulting, calculating, filing applications, etc.), you can understand why they do everything more or less in a hurry...
On top of that comes a shortage of skilled workers, supply problems, etc.
That means: installers simply don’t have the time to regularly attend training offered by manufacturers to expand their knowledge about heat pumps.
That most installers install buffer tanks for safety reasons, I can therefore understand.