本人在Seattle附近,夏天会有一些日子比较热,打算装一个空调(房子已有furnace冬天 加热)。找costco做了个onsite estimate如下: Lennox XP-14-230: 3Ton Heat Pump CR33: Indoor Coil CS7000: Programmable Thermostat MERV 11: Healthy Climate Cabinet and Filter 详细的work items包括: New electrical for Heat Pump Install new pad for outdoor compressor Install new refrigerant lines Use R-410A refrigerant per EPA Charge to manufacturer's specs New low volt wiring (sensor,t-stat, etc) Dispose of replaced ductwork fittings Install energy saving thermostat Airtight plenum transitions at furnace & AC/HP Clean work area after installation Permits & inspection required & included New condensate drain and/or pump Duct Leakage Test PMA Manufacturers Equipment Warranty 1 Year Labor Warranty Complete system start-up 1st year planned maintenance 报价$8426(不含税).另有10%的discount. 懂行的大牛帮忙看看靠谱不,多谢!