Metal chilled ceilings respond very quickly to changing loads, typically cooling to operating temperature within 15 minutes of being turned on. Plasterboard radiant ceiling on the other hand has a much lower thermal conductivity and can take 4 times longer. The conditioning is much more evenly distributed than forced air systems which create localized drafts.

• Controls For Chilled Ceilings
  Radiant cooling controls are designed to control both the room temperature and prevent condensation on the chilled ceiling panel surface. A two-way valve is controlled to permit more or less water to flow through the system. This supply water is kept at a constant temperature. To prevent condensation buildup the supply valve is closed as soon as the temperature reaches dew point as measured by a humidity sensor. Besides this technique of avoiding condensation there is also measures taken by conditioning the intake air removing some humidity and dropping the dew point temperature below the temperature of the chilled water pipes. Both temperature and humidity levels must be monitored to achieve this.
  
  
• Connection Between Panels
  Flexible hydraulically connected hoses connect the ceiling panel pipes together. The panels are typically hinged to the ceiling structure and can be easily dropped down for access to the ceiling space.
  
  
• Aesthetic Features
  Radiant Ceilings come in an array of shapes and sizes thus giving the architect a palette to create a unique ceiling design and provide a cooling/heating component at the same time.
  - 2x2 ceilings to fit into acoustical tiles
  - hard lid ceiling
  - open ceiling in between joists
  - custom ceiling designs
  - Easy to access ceiling space and disconnect radiant panel with flexible connection pieces