Hydronics Components in a Radiant Floor Heating System

Hydronics Components in a Radiant Floor Heating System

Hydronics Components in a Radiant Floor Heating System

Hydronics systems always have a thermal source for heating or cooling. If we want to heat things up we need a boiler, heat pump or some sort of a water heater ( solar, electric, gas, geothermal, wood burning or biomass, pick your poison) and we will be circulating water or a water/antifreeze mixture to deliver that heat to the areas to be heated.

Simplified Hydronics Heating System
Simplified Hydronics Heating System

The basic idea is to heat the water then circulate it through tubing in the ground.

  • You first need a heat source which will heat the water or antifreeze solution.
  • You need a circulator pump that will move the heated water in a closed loop from the heat source and back.
  • You need a manifold that will split the hot water to loops no more than 300′ of embedded PEX tubing.
  • You need an expansion tank that will absorb the expanding water when heated and reintroduce this water when the system is cooling down.
  • Since there is always water escaping though air vents that remove bubbles from the system you need some sort of water or antifreeze makeup system to keep the water level topped up.
  • Electronic controls and floor sensing thermostats will keep the floor at a preset temperature.

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