The Fujitsu AOUH24KWAS3 3 Zone 24,000 BTU Multi-Zone Outdoor Unit is used to run up to 3 indoor units at once in a multi-zone application. Mix and match various types of indoor units and connect them to one multi-zone outdoor unit.  General Information Unit Type: Fujitsu Multi-Zone Outdoor Unit Product Line: Standard Multi-Zone Outdoor Units Operating Mode: Cooling & Heating Low Ambient Heat: No Number of Zones: 3 Unit Size: 24,000 BTU Package Includes Outdoor Unit: AOUH24KWAS3 Features DC Twin Rotary Compressor: high performance compressor, low noise Mix and match various types of indoor units  3 Zones Available - mix and match indoor units SEER ratings between 16.8-18.0 Product Specs Connectable Indoor Units: 3  Connectable Unit Capacity: 14,000-27,000 BTU Refrigerant Type: R454B Sound Pressure when Cooling: 51 dB(A) Sound Pressure when Heating: 52 dB(A) Minimum Line-set Length: 16 ft Maximum Line-set Length: 82 ft Minimum Line-set Total: 49 ft Maximum Line-set Total: 164 ft  Pre-Charge Length: 98 ft Line-set Requirements:    Liquid 1/4" x 3 |  Gas 1/2" x 1, 3/8" x 2 Max Breaker Size (A) 20 Dimensions (HxWxD): 27 9/16", 35 7/16", 13" Performance Rate Capacity Cooling/Heating: 22,000 / 24,000 BTU Heating Operating Range (F): 5 to 75 Cooling Operating Range (F): 14-115 SEER Rating (Non-Ducted, Ducted, Mix): 18, 15.5, 16.8 HSPF (Non-Ducted, Ducted, Mix): 9.5, 9, 9.3 EER (Non-Ducted, Ducted, Mix): 12.5, 10.6, 11.6 COP (Non-Ducted, Ducted, Mix): 4.04, 3.42, 3.74