1. What size of Water Storage Heater do I need?

Most boat owners choose to store as much hot water as they can in the space available.

10-15 litres of water at 50 deg C is sufficient for a refreshing hot shower. With limited fresh water supplies on board, less than 10 litres is often enough. A small pressurised water pump will deliver 5 - 10 litres/minute. The water consumption of a shower will depend on shower head design, water pressure and pipe size.

This table is intended as a rough guide to selection. Besides the space available, personal preference and cost may also influence the choice No. of persons is defined by the no. of people requiring consecutive hot showers at 10 litres per shower.

Space Available

Check the space available, preferably close to the engine. Is there room to locate, support and secure the heater and connect the pipework? Is there room to fit or remove an electric immersion heater if necessary?

The space available will determine the choice of a horizontal or vertical heater. C-Warm heaters come in a range of sizes to suit most requirements.

Vertical tanks are thermally a little more efficient, but a horizontal tank can sometimes make better use of available space.

Selection Guide Pages Index, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17