An underfloor cooling system works by the transfer of energy by radiant heat exchange. Radiant heat is when warmth is passed to cooler objects so when the floor is cooled to a temperature cooler than the surrounding air, the floor then absorbs radiant energy proportional to the temperature difference between the surface and the room. This reduces the radiant air temperature more than the temperature of the floor. By continuing to pass cool water through the floor we are able to keep the floor area cool, which enables us to continually absorb warm air from the room through the floor.

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