Qingdao Citizen Fitness Center Stadium is air-conditioned. The air conditioning system of Qingdao Citizen Fitness Center Stadium adopts three-stage air conditioning cold water and one-stage hot water provided by regional energy station. In summer, the cooling system is directly connected with the cooling pipe network of the energy station, with two-stage pump system and five 308m3/h two-stage pumps (4 in use 1 standby). In winter heating, two plate heat exchangers with heat exchange capacity of 4500kW are used to exchange heat with the heating pipe network of the energy station to provide 60/45℃ air-conditioned hot water. Therefore, the stadium is air-conditioned.