The X boilers are used as a heat source for hydronic floor heating system.
The X Pipe are used as a heat source for hydronic floor heating system.
Manifolds are essentially hubs to which all circuits are connected.
Feed pipes run from the boiler to the manifolds and can be installed in different way depending on your building.
Radiators help hydronic underfloor heating systems in upper floors where this is often a timer or a joist structure become practical.
A high-quality thermostat will help to maximise the efficiency of your underfloor heating installation.