With advanced modulating technology, York® LX Series 16 SEER/9.0 HSPF Heat Pump adjusts heating and cooling levels up or down to provide only what is actually needed to condition particular space. In colder weather, demand defrost feature minimizes heat pump operation, removing frost on outdoor coil more effectively than time methods. Powder painted steel coil guards provide protection against corrosion and damage, while balanced, direct-drive fan minimizes vibration and sound.