HERZ laying system

Installation Types for Surface Heating
Relevant control can be implemented using
electronic moisture probes.
There are very flexible design options with
these panels, such as direct workplace
heating for factory areas and wall heating
and room cooling in office premises.
Meander bedding without/with peripheral zones
Spiral bedding
Installation types for surface
heating
Various pipe beddings are possible and
influenced by following criteria:
• Room shape
• Number of heating circuits
• Screed and building Expansion
joints
• Peripheral zones with increased
surface temperature
• Dimension of underfloor and wall
heating systems as a whole, part
or combined heating system
• Balanced surface temperature
• Keeping the minimum-bending
radius for pipes
The aim is to reach the most balanced
temperature distribution along the whole
surface.
This is accomplished with meander and
spiral pipe bedding systems. The flow
and return flow are always next to each
other which creates an alternating flow
of hot and cold heating water. The floor
temperature is measured above the pipe
top surface and between the pipes. The
measured temperature difference is called
wave ratio. It is desirable to keep the wave
ratio very low, which is achieved with
maximum spacing’s of 300 mm and low flow
temperatures.
In very large areas laid in meandering
form, a reversal of direction of the flow
of water may follow at certain intervals of
time in order to achieve an even surface
temperature. This is called reverse or
perpendicular heating.
The advantage of this system is the parallel
position of the flow and return, which allows
a balanced and well distributed surface
temperature.
This type of system is applied by
preference, in peripheral zones, only
advance flow pipes are laid next to one
another.
With various heating circuits the heating
circuit with the highest specific heat load
controls the flow temperature. All other
heating circuits are controlled via the pipe
spacings which range from 70 mm up to
300 mm. It mainly depends on the system
calculation and bedding type.
6
Room heating and cooling for floors, walls and ceilings