Fujitsu offers new literature for both lines of its Energy Star-qualified, high-efficiency, floor-mounted mini-split heat pump systems — RLFFH  and RLFF, with efficiency ratings as high as 26 SEER. The small indoor units were developed specifically for residential and light commercial retrofit applications, ideally to replace standing radiators or any space with limited upper wall space such as a kitchen or sunroom. Systems are available in 9, 12 or 15,000 Btu single-zone models or in multizone configurations.