Shower buffer storage

Why should the outcome in practice be different from the previously calculated result if the given parameters are adhered to.

Unless instead of 15, only 10l/min can be produced or the showerhead suddenly uses 26 instead of 17l/min.

Neither the calculation expert nor the practitioner can influence that.

So the price difference to 300l should be so small that it is not worth considering.

CerapurModul 9000i has either 150 or 210 liters of buffer storage - not 300. Furthermore, the question arises as to how the storage is charged. For example, if solar thermal energy is also used, it could be that the lower part is only charged by ST, meaning: In winter, you only have half the storage capacity.

What does the installer say about this issue?

Best regards

K1300S

CerapurModul 9000i has either a 150 or 210 liter buffer tank - not 300. Furthermore, the question arises as to how the tank is charged. If, for example, solar thermal energy is also used, it could be that the lower part is only charged by ST, meaning: In winter, you only have half the storage capacity.

What does the installer say about this question?

VG

K1300S

The installer says that according to the manufacturer's statement, that should be sufficient and no larger buffer tank is possible with this model. Hence my question about practical experience. The 210 liter tank; does that only work in conjunction with solar thermal energy or could it also help me? I have not planned to install a solar thermal system.

Yes, it looks like the 210-liter version then also inevitably uses solar. Since you did not plan for that, it will probably remain at 150 liters. My experience with a 160-liter tank and only one shower: It can get tight if someone takes a long shower, so I suspect that 150 liters with two showers will be even tighter.

VG

K1300S

We have 400 liters with 3 showers and a bathtub - especially with a heat pump, I would rather play it safe.