Sure Cal Range

The Sure Cal boiler or calorifier has been our flagship product for decades, high quality materials, superb hand built construction and a hard earned reputation for quality make the Sure Cal calorifier one of our top selling products year on year.

The Sure Cal calorifier is an industry leader and the favoured choice for the boat builder or individual who demands reliability quality and performance for their onboard water system.

Sure Cal boilers are made of the finest quality materials, which guarantee the ultimate performance and reliability. In addition the drop coil technology and finned surface heat exchanger used in the boiler provides unrivalled heat recovery.

The units also come in twin coil versions for use with secondary water heaters such as Eberspacher and Webasto.

The unit is quick to install with full fitting instructions provided. The boiler is insulated in a polyurethane jacket which will retain heat for up to 24 hours after the engine has been switched off.

Our calorifiers provide the complete domestic hot water systems for onboard use whatever the size of the craft.

The boiler is made of 100% copper; this gives both performance and health benefits. Copper has excellent anti-bacterial qualities. On test, after seven days of immersion in water, 80% of stainless steel and plastics were coated in a bio film, while copper showed little to no bio film. Bio films are harbingers of E-coli 0157 and other micro biological organisms and pose a significant threat to human health.

The stored water within the boiler reaches the same temperature as the engine (generally 85°C). A thermostatic mixer valve is fitted as standard for the safety of those on board and also increases the volume of water available. If the mixer valve is set at 65°C, it blends cold water with the 85°C water provided by the calorifier and gives 25% more volume at 65°C.

The Sure Cal boiler gives boat builders using our products a superior hot water system.

Sure Cal calorifiers are completely assembled ready for quick and easy installation. Every calorifier is individually bench tested ensuring quality and reliability every time.

In house development and production allows us to provide boat builders the exact shape and size of boiler to suit their space and application.

The SureCal comes complete with:

Surecal comes complete with thermostatic mixer valve, 4 bar pressure release valve, 1kw immersion heater, non return valve, 15mm barbed connections for coil and ready for push fit plastic plumbing in 15mm. Also supplied st/steel mounting feet

Options available are:

Twin or even triple coil calorifiers can be made to order in almost any size if required.

A range of barbed hose connectors in 12,13,15 and 16mm that can go onto the calorifier if using flexible hose or radiator hose.

15mm connections for john guest or Hep20 speed fit connections.

15mm whale plastic plumbing connections.

Also male or female BSP threads where required.

A range of immersion heaters that can be fitted if preferred

• 750watt 240 volt
• 1000watt 240 volt
• 1250watt 240 volt
• 1500watt 240 volt
• 2000watt 240 volt
• 2500watt 240 volt
• 3000watt 240 volt
• 1000watt 110volt