您可以省下三千五, coil漏就先换coil, 剩机会改用R422B, 或R438A, 跟R410A一样环保, 又不用换机, 只需换制冷剂(和一两个小零件)
http://www.ebay.com/itm/R22-Refrigerant-DROP-IN-REPLACEMENT-DuPont-MO99-25-lb-Jug-/150865902419?pt=LH_DefaultDomain_0&vxp=mtr&hash=item23204efb53