Radiant -  How it works, Glossary

Thermostat determines heat is needed, sends signal (Tekmar Image).

To the Optional Controls    

To the Boiler which can be electric, Natural Gas, heating oil, propane, wood,or heat pump.

Which makes Hot water  

we  remove excess air with an air eliminator                  

move the hot water with a circulator                            

          

to optional Motorized Three way mixing valve operated by controls      

Sends hot water through the distribution manifold
with optional Zone Valves

Out to the Pex loops in the floors

and back to the boiler again

Also needed  make up water, Double check valve,
 pressure regulator and expansion tank.