Gas Appliance Guide

Marine Hot Water Cylinders

Marine Calorifiers - hot water heaters for boats

Pumped & unpumped hot water storage for marine vessels.

Marine Calorifiers - Direct and Indirect models

Hot water vessels manufactured to marine specification (also known as Calorifiers) are available in a particularly wide range of configurations in order to meet a variety of needs from the marine industry.

Vertical or Horizontal, single and twin coil Calorifiers

Marine Calorifiers can be manufactured to either a vertical or horizontal pattern and factory insulated. Marine cylinders can be made with single or twin heat exchangers to accommodate more than one heat source if available (e.g. engine, solid fuel, gas boiler, etc).

Custom and bespoke design service

It is also possible to manufacture your Calorifier with all connections along one side, or in one end, affording amazing flexibility to the boat designer and simplicity to the fitter. This can be a feature of particular importance when space is at a premium or confined access makes positioning difficult.

Built to cope with a harsh corrosive environment

In the aggressive salt water environment in which these vessels have to operate copper is arguably the best material from which to manufacture. The common belief that stainless steel doesn't rust is actually inaccurate. Whilst stainless has a high tensile strength it does corrode.

Calorifiers for power boats and luxury watercraft

Longer life Calorifiers from superior build quality

These days stainless steel is in fact cheaper to buy than copper so it's no surprise that manufacturers prefer to use it to maximise profits! The Calorifiers you will find here are manufactured from a heavy gauge of copper to withstand a working pressure of up to 3 bar. This is suitable for most marine applications but even higher specification is available where higher operating pressures are required. Don't hesitate to call with your product specifications or requirements.

Water heating marine calorifiers for river craft

Hot water Calorifiers for work boats and trawlers

Calorifiers for hot water on residential, river boats and long boats

Cylinder Connections
Letter on Diagrams	Connection type
A	1/2"male connection cold feed in
B	1/2" male connection hot draw off
C	1/2" male connection primary flow in
D	1/2" male connection primary return out
E	1/2" male connection expansion valve
F	2.1/4" female immersion connection
G	1/2" male connection auxilary primary flow
H	1/2" male connection auxilary primary return

Vertical Marine Calorifier - twin coil water heater cylinder

Horizontal Marine Calorifier - Twin coil water heater cylinder

Calorifiers to provide hot water aboard all type of sea going vessel

Marine Calorifiers Price List (Marine spec hot water cylinders for boats)

Prices relate to horizontal or vertical pattern marine calorifiers.

		Capacity		Single Coil	Inc VAT	Twin Coil	Inc VAT
Size (mm)	Size (Inches)	Litres	Type	Ex VAT	20%	Ex VAT	20%


450 x 300	18 x 12	28	Indirect	£193.97	£232.76	£220.46	£264.56
600 x 300	24 x 12	38	Indirect	£213.37	£256.05	£241.33	£289.60
750 x 300	30 x 12	48	Indirect	£223.91	£268.69	£250.40	£300.48
825 x 300	33 x 12	51	Indirect	£246.29	£295.55	£272.80	£327.36
900 x 300	36 x 12	57	Indirect	£270.92	£325.11	£297.41	£356.89

450 x 350	18 x 14	34	Indirect	£214.64	£257.57	£241.14	£289.37
600 x 350	24 x 14	48	Indirect	£233.18	£279.82	£259.67	£311.60
750 x 350	30 x 14	62	Indirect	£246.44	£295.73	£272.94	£327.53
825 x 350	33 x 14	67	Indirect	£275.57	£275.57	£302.08	£302.08
900 x 350	36 x 14	76	Indirect	£296.76	£356.11	£323.27	£387.92

450 x 375	18 x 15	38	Indirect	£262.39	£314.87	£287.22	£344.66
600 x 375	24 x 15	54	Indirect	£251.08	£301.29	£267.73	£321.28
750 x 375	30 x 15	70	Indirect	£267.00	£320.40	£285.73	£342.88
825 x 375	33 x 15	75	Indirect	£304.70	£304.70	£321.00	£321.00
900 x 375	36 x 15	86	Indirect	£315.80	£378.96	£333.28	£399.93

450 x 400	18 x 16	42	Indirect	£291.42	£349.70	£316.61	£379.93
600 x 400	24 x 16	60	Indirect	£308.41	£370.09	£334.90	£401.88
750 x 400	30 x 16	78	Indirect	£327.47	£392.96	£351.54	£421.85
825 x 400	33 x 16	84	Indirect	£344.71	£344.71	£362.90	£362.90
900 x 400	36 x 16	97	Indirect	£363.12	£435.74	£375.23	£450.27

450 x 450	18 x 18	42	Indirect	£317.96	£381.56	£369.24	£443.09
600 x 450	24 x 18	73	Indirect	£339.17	£407.00	£386.75	£464.10
750 x 450	30 x 18	97	Indirect	£357.72	£429.26	£398.32	£477.98
825 x 450	33 x 18	104	Indirect	£370.97	£370.97	£420.25	£420.25
900 x 450	36 x 18	120	Indirect	£384.23	£461.07	£481.64	£577.97


Extras and additional items				ex VAT	Inc VAT

Expansion Relief Valve set at 3 bar				21.50	25.80
Immersion Heater 1kW				25.50	30.60

Delivery Costs - are in addition to prices quoted and depend on your location in the world.
For most of mainland UK please see below. For international destinations please call for quotation.

Mainland UK delivery (up to 30 x 18)				34.00	40.80
Mainland UK for 36 & 38 x 18 cylinders				40.00	48.00
For overseas delivery please call for quotation

Choose from other Cylinder Products

Direct and Indirect Copper Cylinders, Direct and Indirect Economy 7, Gravity and Pumped Heat Source, Combination Cylinders, Twin Coil and Solar Cylinders, Thermal Stores, Solar Thermal Stores, Heat Pump Stores, Vented and Unvented hot water cylinders, Horizontal Cylinders, AGA, Rayburn, Wood burning Stove.

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