Compact i21VSD Marine Air Conditioner Unit - 230V - 21,000 BTUVelair&';s i-line VSD (Variable Speed Drive) series units feature built-in inversion technology for better efficiency, less power consumption and no more more start-up power spikes. VSD units offer top comfort with no temperature or humidity fluctuation and works properly even on smaller generators and weak shore power.Self-contained VSD air conditioners provide the best of the existing technology - compressor featuring a brushless DC motor and an inverter that constantly controls speed and cooling power delivered. The compressor continuously changes its running speed depending on ambient and set temperature. The compressor also operates at maximum power to cool rapidly.Velair Part Number 22571WWFeatures: VSD (Variable Speed Drive) eliminates start-up spikes Highest energy efficiency Minimal fan noise and vibration Reverse-cycle for heat pump function Constant temperature output maximizes comfort Cabin control display offers ease of use Smart Control iOS and Android App available to control all AC functions Technical Specifications: Input voltage - 1 PH 230VAC 50/60Hz Refrigerant type - R410A Heat Pump - Yes Cooling Capacity - 21,000 BTU Maximum Air Flow - 800 m3/h Air Duct Diameter - 6" Sea Water Flow Rate - 5.3 gpm/20 l/min Dimensions (H x W x D) - 28.7" x 17.5" x 12.7" (73 x 44.5 x 32.3 cm) Weight - 88.2 lbs (40 kg) In the Box: Self-contained AC unit Digital control and 26.25&'; (8 M) cable Instruction manual *Sold as an IndividualThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.