SAPP®ceilingHybrid turns your ceiling into an acitve climate-control system that regulates the temperature of your space in a continuous day-and-night cycle. During the daytime, the water flowing through the pipes of the SAPP®ceilingHybrid system works together with the concrete structure to absorb the heat of the building. At night, the SAPP®ceilingHybrid remains active (free chilling) so that the concrete structure discharges the stored thermal energy.