scope:

There are various types of hydronic radiant heating and cooling systems: ceiling mounted radiant panels, chilled beams, pipe embedded ceilings, walls, and floors. In those system alternatives, ceiling mounted radiant panels are widely used and frequently installed on T-bar grids designed to support the dropped acoustical ceiling. In principle, ceiling mounted radiant panel systems are able to accommodate varying space sensible loads by controlling panel surface temperature. Heat is transferred to the radiant panel by the heat transfer mechanisms of convection and radiation. This standard applies to all types of prefabricated radiant panels with an open air gap that are part of the room periphery such as ceiling, walls and floor. But this is not applicable to the panel system without open air gap, which is integrated with the building structure. This standard does not cover panels embedded into ceiling, wall or floor structures and hybrid (combined thermal radiation and forced-convection) ceiling panels. This standards specify the design, test conditions and methods for the determination of the cooling and heating capacity and control and operation of radiant heating and cooling panels with an open air gap. The present Part 3 of this standard specifies the design considerations and design processes of ceiling mounted radiant panels.