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1. Function
The service water stored in the internal boiler enamelled according to DIN 4753 is heated indirectly by the surrounding hea-
ting water. The buffer content (heating water) can be heated indirectly by means of a large-surface pipe register that is wel-
ded in permanently, and/or directly through the coupling sleeves by means of a boiler, heat pump, solar system, screwed-in
heating for the buffer area and a built-in heating for the service water area.
The array and number of sleeves, as well as the pipe register that is available on various models allow a multivalent opera-
tion.
2. Hot Water Demand
The hot water demand in a household depends on the number of persons, the sanitary installations of the apartment or the
house, as well as the individual habits of the user.
Full bath
Shower
Washing hands
Hair wash (short hair)
Hair wash (long hair)
Use of bidet
Washing dishes
for 2 persons per day
for 3 persons per day
for 4 persons per day
House cleaning per bu-
cket of cleaning water
at approx. 12 °C.
Due to the hysteresis of the temperature control (± 7°K) and possible radiation losses (cooling-down of the pipelines), the
Hot water demand in litres
at 37 °C
at 55 °C
150 - 180
30 - 50
3 - 6
6 - 12
10 - 18
12 - 15
16
20
24
10
11
Required storage water
quantity in litres
with 80 °C
with 60 °C
55 - 66
78 - 94
11 - 18
16 - 26
1 - 2
1,6 - 3,1
3 - 4,4
4,2 - 6,3
3,7 - 6,6
5,2 - 9,4
4,4 - 5,5
6,3 - 7,8
10
14
12,5
18
15,2
21,5
6,3
9
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