Marine Premium Water Heater have toxic free ceramic inside coating to ensure highest water quality over time. Fixed port connections BSP 1/2″. Heats up 22 l water in 1 hour, good for 35 l of mixed mixed warm water or a 3,5 minute shower. Operation with 850 W, 230 V. Dimensions: 423 x 390 x 390 mm. Volume: 22 l. Weight: 11 kg.