What are the different types of chilled beams and ceilings, and how do they differ?

There are several types of chilled beams and ceilings, including active and passive chilled beams, chilled ceilings, and rafts/sails. Active chilled beams use fans to enhance convection, while passive chilled beams rely on natural convection. Chilled ceilings and rafts/sails are designed to cool larger spaces and can be used in conjunction with other HVAC systems.