Spaces with 100% forced-air systems have higher mean radiant temperatures due to solar gains and office equipment. In cooling mode, the heat transferred into the floor is removed from the space via the circulating fluid. With cooler surface temperatures, the air can be warmer without causing discomfort, saving energy.Ī radiant cooling system works with the reverse energy transfer process, providing a comfortable environment by absorbing heat from the space.We typically use setpoint temperatures above 75☏ for radiant cooling applications.Indoor air temperature setpoint is elevated, or operative temperature may be too low.Indoor air does not have to be as cool for equivalent comfort.

Human body radiates more heat to floors, walls, and ceilings.Surfaces are cooler with radiant cooling.The range of the floor temperature: 66 – 84☏Īt this operative temperature, the maximum percentage of people will have thermal comfort and a reasonable percentage of less than 10% of people will feel dissatisfied.Ī lower Mean Radiant Temperature increases the radiant heat loss from the human body:.Panels must be maintained at a temperature very near to the dew point within the house, and the house must be kept dehumidified. Aluminum panels suspended from the ceiling, through which chilled water is circulated. Cooling the ceiling is usually done in homes with radiant panels. Radiant cooling cools a floor or ceiling by absorbing the heat radiated from the rest of the room. The ventilation air must be dehumidified upstream to avoid condensation potential at the chilled beam. Active chilled beam – They have a ventilation air duct through the chilled beam.The system does not have any method for maintaining the humidity of a room and must be paired with a ventilation system. The cooling capacity is approximately 400 BTU/hour per linear foot of beam. Passive chilled beam – Passive beams use a pipe surrounded by a coil in order to form a radiator system, often used in conjunction with an under-floor air distribution system.Chilled ceilings lack the ability to control the humidity of a room and must be paired with a ventilation system. The sensible cooling capacity is approximately 24 BTU/hour per sq. Chilled ceiling/floor/slab/wall – They work by means of convective and radiant heat transfer, and induce air movement.There are three types of radiant cooling systems:

Radiant heating and cooling