Abstract:In the course of the construction of SPF animal laboratory in Jinzhou medical college, the installation of energy recovery and the heating technique of water derived hot pump was used in order to lower the cost and running expense and save energy consuming.In summer, the heat produced by air conditioning refrigeration was discharged by cooling tower.In winter, heat energy was took away from heating system by the technique of hot pump reverse circulation.The refrigerative and heating capability of air conditioning was automatically regulated by electric three way valve.On the premise of insuring the air conditioning parameter, energy was saved and therefore the running costs were cut down.