Residential central air conditioning is different from the split air conditioner to buy, it must direct the basic pattern of Nanjing indoor commercial central air conditioning, in the head of the household, decorator joint cooperation, and simultaneous implementation schedule interior decoration design, installation, commissioning, so choose purchase of residential central air-conditioning will go through the following steps: 1) choose well-known brand of Nanjing commercial central air conditioning offer, product quality, installation technology, after-sales service are guaranteed. 2) to obtain detailed product information, according to their chamber structure, characteristic decoration consulting professional sales staff, determine the product type. 3) After the initial choice of a good brand and product type, sales staff to visit their proposed model works, site visits. 4) Next, the sales staff will be based on your room, fitting characteristics, select the type of product design and installation program and submit cost estimates. 5) In determining the installation program, quotes after signing the contract, enter the installation and commissioning phase of Nanjing commercial central air-conditioning agents, owners should try to install overseer. 6) The last step is the acceptance and settlement costs of the project. According to Nanjing Jin Long Refrigeration Equipment Co. official explained, air-conditioning refrigeration technology is the normal cooling range, mainly using vaporization of the liquid cooling method. (Mainly using liquid vaporization process to absorb than the latent heat, and the liquid pressure different Nanjing commercial central air conditioning, and its boiling point is different, the lower the pressure, the lower the boiling point.) Depending on how the transfer of heat to the cold objects from the hot object, separable as follows: a vapor-compression refrigeration, absorption refrigeration. Which is better Nanjing commercial central air conditioning commercial central air conditioning _ _ Nanjing Kingnet refrigeration provided by Nanjing Jin Long Refrigeration Equipment Co. Nanjing Jin Long Refrigeration Equipment Co., Ltd. (www. Njjinlang.com) strong, credible, central air-conditioning industry in Nanjing, Jiangsu province has accumulated a large number of loyal customers. The company better work attitude and continuous improvement philosophy will lead the wave of innovation in refrigeration and you hand in hand into the brilliant, for a better future!