Open central air conditioning and heating, such as fluoride in general, due to the thick tube and this was high pressure, it will be returned to the fluorine freon tank central air conditioning installation, we recommend the water tank immersion fluorine (This method is a little dangerous) Reminder: This method is a little dangerous center Air conditioning agents, but very environmentally friendly central air-conditioning agents, where this method is not recommended. DC inverter: DC inverter is more superior than the AC frequency. The use of DC digital variable speed compressors, only after a voltage converter, AC frequency than 18-40% of the energy savings. Central air conditioning installation | Qishan central air conditioning | Xi'an Hao Electrical and Mechanical Services provided by the Xi'an Hao Electrical and Mechanical Technology Limited. Xi'an Hao Electrical and Mechanical Technology Co., Ltd. (www.029hfkt.com/)(www.029hfkt.com) strong, credible, in Xi'an in central air-conditioning industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Electrical and Mechanical Xi'an Hao into the brilliant and you work for a better future!