Fujitsu 9,000 BTU 26.5 SEER Mid-Tier Wall Mounted Single Zone System - R410AFujitsu 9,000 BTU 26. 5 SEER Wall Mounted Single Zone System is the perfect combination of efficiency and performance. This model uses High Corrosion Resistant Copper which helps prevent leaks in the units' coils. This system comes with an out of the box 7 year compressor 5 years part warranty, 10 year warranty if its installed by a licensed HVAC tech and registered within 60 days, or a 12 year warranty if it's installed by a Fujitsu Elite contractor.