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Floor System Components

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Furnaces - Legalett

Heats the air, which circulates through the system.

There are two general types:

Water Coil Units

  • Very simple in design.
  • Contain a water/air heat exchanger to distribute the heat from the heat source (hot water tank, boiler, etc.) to the air in the pipe system.
  • Contains a fan to move the air.
  • Simple thermocouple turns the fan on and off as demanded by the supply of hot water to the unit by the thermostat.
  • Uses internal valving for control, as well as the external heat source to provide the heated water.

Electric Units

  • Contains electric heating elements and a fan.
  • Simple in overall function.
  • Only requires electricity to heat the air directly with the heating elements.


Heater Unit Control

  • Up to 4 heating zones per unit.
  • Simple wall mounted programmable thermostats.


All moving and mechanical components are contained within the furnace box.
Furnace boxes can be easily opened and accessed for maintenance, as required.


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