The innovative ASU 3751 SP utilizes the patented SP thru-hull fitting which incorporates a built-in passive heat exchanger-giving you the cooling power of water without the need for a troublesome seawater pump. It also replaces the galley thru-hull, so no new holes are necessary for installation! The system is nearly silent in operation and very efficient-even in tropical waters. Advanced electronics monitor available battery power and adjust the three-speed compressor for greatest efficiency. This stainless steel holding plate system will refrigerate a box up to 7cu.ft. SP systems for larger or smaller boxes are available by special order.Chilling Medium: Holding plate Power Requirements: 6A @ 12V DC; 3A @ 24V DC Cooling Capacity: 7cu.ft. Dimensions: Compressor: 8"L x 5"W x 6"D; Holding plate: 14"L x 11"W x 2-1/2"D Weight: 45lb. Plumbing Connections: Compressor: Quick disconnects; Holding plate: 6' precharged copper tubing with quick disconnects; Cooling Water Intake: SP thru-hull fittingElectrical Connections: Hardwires to 12V or 24V electrical system Seawater Cooling Required: Yes Warranty: Five years