Cased or Uncased?

If the heater is to be installed out of sight, an uncased model will be the more economical choice. If the heater is to be a prominent feature of the galley, saloon, or engine room, a smart painted steel or stainless steel casing will match the appearance of the finest equipment on board. Cased and uncased models are identical in performance.

Single or Twin Coil?

Choose a single coil model unless you plan to utilise waste heat from more than one engine, or install an auxiliary burner to heat the water when the engine is not running.

Immersion Heaters

Immersion heater power is often limited by onboard a.c. generator capacity or by the shore supply. A double-protected immersion heater with twin thermostats and Incoly element sheath is strongly recommended.

DO NOT USE STANDARD DOMESTIC IMMERSION
HEATERS WITH SINGLE THERMOSTATS AND COPPER ELEMENT SHEATHS