Rehau STAR 20 Installation Manuallines page 21

Figure 5. Compact mixer unit fitted to the left side of the manifold with FH flow header on top, FH return header on bottom.
Local Balancing
This cleverly prioritises demand from each zone dependent upon
the difference between the current and required temperature. This
provides more accurate comfort control and adds to energy effi ciency.
Forced air
To calculate the heat loss for a structure. We need to know the
following:
- The temperature to be maintained within the structure.
- The lowest ambient (design outside temperature) which can be
expected for the area.
- The direct heat loss from the overall surface area of the structure.
- Heat loss through natural or mechanical ventilation.
- The temperature lift required i.e. the difference between the
ambient and internal temperatures
Ω"or æ"
Zone Temperatures
By measuring and linking a room sensor to our system, we can control
a given temperature in a room or zone, no matter how large or small,
adding yet again to the overall system energy effi ciency.
Underfl oor heating
- Shown above is a typical heat distribution showing underfl oor and
forced air. We see that in the forced air heat rises due to convection
warming the upper parts of the building but in the underfl oor heating
diagram heat is contained at lower levels which reduces energy losses.
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