Abstract: Considering the features of the hotel,adopts water-cooled centrifugal chillers and atmospheric pressure gas-fired hot water boilers and gas-fired steam boilers as cold and heat sources of the air conditioning system,This article had a thorough analysis on the following aspects: the suction mode of fresh air in winter,valve control with common header, fan coil of guest room, rated air conditioning system of lobby,ventilation and heating of garage;at the same time,made follow-up feedback about hotel’s operating conditions and analyzed the key issues.

Key words: cold and heat source, all-air system, primary air fan-coil system, primary air heating, variable flow distribution with primary pump system