It's been a while since the last "report". Current status: exterior plaster and drywall (bathrooms) are finished. Great work by the guys!
The heat pump has been running since 07.11.2019 at 12:00 PM. Before that, we filled the ground collector ourselves with antifreeze. That's another rip-off trap. You can fill in relatively expensive pre-mixed antifreeze rated for up to -45 degrees. We procured concentrate and mixed it with the very soft tap water. The mixture should withstand -20 degrees. The price is about ¼ of the ready-made mixture. The heat pump switches off at a flow temperature of -5 degrees anyway. Even if the ground collector (at a depth of at least 1.5m) should freeze, the PE pipe accommodates the expansion. You can annually check the freezing point (just like with a car). If necessary, the service life until complete replacement is shorter, but given the price ratio, even twice as many replacements are still worthwhile.
We accomplished filling the brine using a rain barrel and a pond pump. At first, the experts were skeptical, but we were able to fill the 4 circuits with 300m each (and the section from the distributor to the heat pump about 50m) completely air-free.
We extended the 14-day heating program to 30 days to be on the safe side with the drying level. In the first 14 days, daily to every two days "ups and downs", the last 16 days full throttle with 50-degree underfloor heating. It costs electricity (about 200 kW per day), but at least the system runs very well. The brine fluid is still at +2 degrees. On days with a flow temperature of 25 degrees, the consumption for just under 350m² was 2-3 kW. That’s a more positive figure.
Exterior plaster. At the very beginning, I always said I didn't want a white house with gray windows and a gray roof… Well, you can see the pictures in the attachment. We had actually agreed on a gray-brown tone for the house, but the reasons against were, on the one hand, the costs. The paint was applied twice, and this should guarantee a neat, clean appearance for the coming years, even decades.
The heat pump will run at full throttle until 07.12. The CM value is supposed to be measured on weekdays next week. Let's see what comes out of it; some experience is still missing with a total of just under 30 cm screed (lightweight screed and anhydrite screed or cement screed in the bathroom). The plan is to start tiling in calendar week 50. We will glue the parquet over Christmas. Thus, the move on 29-30.12 could work out. We have to be out of the apartment by 31.12. It will be somewhat rustic without final installation at first, but at least inside.
Oh, and the lawn is also picking up speed again. It was good not to take the cheapest seed. Even with frost, it grows well. You can see some green in the picture from the south.
Provisionally (only on sand), we paved the access path to the attic on a Saturday.
