Viessmann PE-RT (polyethylene raised temperature) pipe is the recognised product of choice for underfloor heating across Europe. Lightweight and flexible with an EVOH (ethylene vinyl-alcohol copolymer) oxygen barrier to prevent system ingress and corrosion. The pipe is laid onto insulation board placed over a solid concrete base (not supplied). Screed is then poured over the top of the pipes (not supplied). This construction is typically used on ground floors or block and beam floors. The actuator fits to the return bar of the manifold and is connected, via the wiring centre, to the room thermostats and the heat source to control the water flow around the underfloor heating circuit. If a room thermostat calls for heat the actuator powers open to allow a flow of heated water around the pipe circuit. Once the room reaches temperature the actuator closes and stops the water flow.
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