The 16DF direct-fired double effect absorption chiller/heater ranges from 135 to 1000 tons and is available in 17 model sizes to fit almost any application. Fired by natural gas and/or No. 2 fuel oil, the 16DF features a COP of .97 which takes into account the combustion efficiency of the burner which is furnished as an integral part of the machine. It is capable of producing not only chilled water in the cooling mode, but also up to 140F hot water in the standard (2-pipe) heating mode using the evaporator as the heating bundle. When higher hot water temperatures are required, an optional auxiliary heat exchanger can be added allowing hot water temperatures up to 175F in a 4-pipe configuration. Hinged waterbox covers on the evaporator, absorber and condenser are also standard as well as marine waterboxes on select heat exchangers. Multiple-piece shipment facilitates rigging in buildings with limited access.