Air to Air

Major products: Floor standing unit, ducted split unit, rooftop packaged unit, constant temperature and humidity unit, and other unitary air conditioning products.

It is the air cooled type central air conditioning unit, and air is the cool medium, and to produce the cool air. Also It could be the air heat source type central air conditioning unit, air is the heat medium, and to produce the heat air. It needs not the dedicated machine room, also it needs not the cooling tower as well as the water pump and other water systems, so we just need the air duct, then the whole air system and control system are simple.
Widely used in the different type construction like restaurant, shopping mall, hospital, hotel, factory, office building and government building, school, airport and machine room etc.

Air to Water

Major products: Mini air cooled chiller and heat pump, modular chiller and heat pump, air cooled screw chiller and heat pump etc.

Major type: Cooling only, heat pump, cooling only+heat recovery, heat pump+full heat recovery etc.
It needs not the dedicated machine room, also it needs not the cooling tower, but need the water pump and other water systems, the water system and control system is relatively more complicated than the air to air type, but it is more energy saving than that.
Widely used in the different type construction like restaurant, shopping mall, hospital, hotel, factory, office building and government building, school, airport, Sauna room and swimming pool etc.

Water to Water

Major products: Water source heat pump, Water cooled module chiller and heat pump, water cooled screw chiller.

Major type: Cooling only, heat pump, cooling only+heat recovery, heat pump+full heat recovery etc.
It needs the dedicated machine room, also it needs the cooling tower(or ground loop), It needs the water pump and other water systems for chilled water and cooling water, the water system and control system is relatively more complicated than the air to water type, but it is more energy saving than that.
Widely used in the different type construction like restaurant, shopping mall, hospital, hotel, factory, office building and government building, school, airport, swimming pool and villa etc.

Terminal

Major products: cabinet air handling unit, module air handling unit, hygienic air handling unit, ceiling concealed type fan coil unit, exposed type fan coil unit, cassette type fan coil unit, high static pressure fan coil unit etc.

Terminal products should be used together with the water chiller, and usually no controller on it, should use the external controller.
Widely used in the different type construction like restaurant, shopping mall, hospital, hotel, factory, office building and government building, school, airport, stadium, expo centre and subway etc, as well as the special place like medical, electronic, textile, food, chemical etc.