Consisting of 2 pieces of equipment, Ilios™ HEWH-500-AS Split System combines engine-driven heat pump portion, which is contained in small acoustic enclosure within building mechanical space, and remote air-source evaporator package, which can be placed outside mechanical room. Since remote evaporator has minimal service needs, it can be placed in difficult-to-access areas. Tightly packaged in 3 x 5 ft enclosure, indoor component easily retrofits into existing mechanical spaces.