Chillers are an approved Green Deal measure under the Building Services Mechanical category.
What are Chillers?
Water chillers remove heat from a HVAC System by cooling and dehumidifying the air. There are two main types of water chillers, these being Mechanical and Absorption Types.
Mechanical Chiller Systems consist of a compressor, a condenser, an evaporator and other control devices. Absorption Chiller Systems does not have a compressor but has a generator and absorber in its place.