Designed as a direct replacement for PTAC units often found in hotels/motels and high-rise residences, Fujitsu’s STHP (Split-type Thermal Heat Pump) is a combination indoor unit/condensing unit that fits the sleeve of a PTAC, offering higher efficiency, quieter operation, greater comfort and simplified maintenance, the company says. The systems provide heating and cooling, even with outdoor temperatures as low as 5° F. Available in 9,000 and 12,000 Btu/h capacities, the STHP offers up to 21.3 SEER performance.