Underfloor Heating Manifold FAQ
What is a Floor Heating Manifold?
The underfloor heating manifold is the heart of the heating system which controls the hot water that is distributed into the underfloor heating pipes.
Manifold with mixing pump ("high temperature")
At high temperatures (above 60 degrees flow water temperature) manifolds are required to have a mixing pump attached, which ensures a constant and correct water temperature and circulation of the water in the system.
Using a thermostat and sensor, the blending valve mixes the flow water with cooler return water to ensure a correct water temperature. The Underfloor heating manifold then ensures that the correct amount of warm water is passed through the system and that you’re desired temperature is achieved and maintained. This way you can constantly have a pleasant heated floor.
Open Manifold ("low temperature systems")
At low temperatures (45-60 degrees flow water temperature), the supplied water can go directly into the system without the need of a blending valve. In this case, it uses an open manifold system, and the water is circulated throughout the system using an external pump or system pressure. The only thing that the manifold does in this case, is distribute the water throughout the system ensuring an equal spread of the hot water throughout.
Unsure what is required?
If you are unsure about what type of manifold you require in your system, first consult your boiler manufacturer. If this is being added to an existing system, where radiators are install or begin replaced, using a mixing pump is advised.