Isotemp SPA water heaters from Indel Webasto include a stainless steel inner tank, injected polyurethane insulation and a robust polypropylene outer casing to provide a combination of performance and durability. A corrugated, stainless steel heat exchanger taps into the heat generated by your engine’s cooling water whenever it’s running, while an immersion heating element does the job when you’re under sail. The tanks are available without a mixing valve to regulate water temperature at the outlet.
From $400. Indel Webasto Marine