Whale Seaward 3 Gallon Hot Water Heater w/Side Heat Exchanger - White Epoxy - 120V - 1500W

The Whale Seaward 3 Gallon Hot Water Heater with Side Heat Exchanger is a compact marine water heating solution engineered for vessels that demand reliable hot water without excess weight. Built with a white epoxy coating, this 120V, 1500W electric heater integrates seamlessly into tight galley spaces while delivering consistent performance in salt-air environments where corrosion poses a constant threat to onboard systems.

At just 14.8 pounds and measuring 17 x 14 x 17 inches, this heater ranks among the lightest options available, a critical consideration for vessel weight distribution and fuel efficiency. The side heat exchanger design allows waste heat recovery from engine coolant systems on vessels with engines, improving efficiency on longer cruises. The 3-gallon (11-liter) capacity provides sufficient hot water for multiple crew members without requiring extensive tankage. Marine-grade construction materials withstand the corrosive effects of salt spray and humidity that degrade standard household water heaters within months of saltwater exposure.

This heater serves weekend anglers and extended-range offshore vessels alike. Weekend fishermen benefit from its compact footprint on smaller center consoles and cabin cruisers, while serious blue-water crews rely on its durability during extended deployments. The 120V requirement means it operates from standard onboard power systems or shore power during dock time, making it practical for both inshore and offshore applications where hot water availability affects crew comfort and operational efficiency during extended trips.

Whale Marine's focus on marine-specific engineering distinguishes this heater from consumer-grade alternatives. The side heat exchanger configuration integrates with existing engine cooling systems when available, reducing electrical draw during underway conditions and extending battery life on auxiliary power. This is the Seaward model (MPN S300W)—the designation reflecting Whale's marine-focused product line designed specifically for saltwater vessels.