Ayrton Oneill
A calorifier is a heavily insulated water tank that is used to heat water on boats. It is usually made of copper or stainless steel and can be cylindrical or rectangular. The hot water system on a boat utilises a pump and water supply, which is piped through a calorifier on its way to the hot tap. This is similar to the hot water systems in our homes, but they are powered by the boat engine's heat exchanger when the boat is in motion.
| Characteristics | Values |
|---|---|
| Power source | Boat engine's heat exchanger when the boat is in motion; 110V electric heating element when docked or via an onboard generator when on the water; 220Vac element when on mains shore power; 12Vdc element to run off domestic batteries |
| Material | Copper or stainless steel |
| Shape | Cylindrical or rectangular |
| Mounting | Vertical or horizontal |
| Location | Under a berth or saloon seating |
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What You'll Learn
- A calorifier is a heavily insulated copper or stainless steel water tank with an electric heating element
- Hot water systems on boats are powered by the boat engine's heat exchanger when the boat is in motion
- Some calorifiers use an inverter (DC to AC converter) to power the 220Vac element
- Twin-coil calorifiers are available for those who want to circulate hot water from both the propulsion engine and a diesel-fuelled, hot water heating system
- Calorifiers are usually cylindrical and need to be firmly mounted using the supplied brackets
A calorifier is a heavily insulated copper or stainless steel water tank with an electric heating element
The hot water system on a boat utilises a pump and water supply, which is piped through a calorifier on its way to the hot tap. The calorifier is powered by the boat engine's heat exchanger when the boat is in motion. The exchanger pushes heat through the water heater's coils, heating the water within. There is also a 110V electric heating element deep within the tank that can heat the water. This element can be supplied with electricity via shore power when docked or by an onboard generator when on the water.
Some calorifiers use an inverter (DC to AC converter) to power the 220Vac element, but this consumes large amounts of battery capacity. Some twin-coil calorifiers are also available for those who want to circulate hot water from both the propulsion engine and a diesel-fuelled, hot water heating system. For running off electricity, a calorifier can either have a 220Vac element inside, for use when you're on mains shore power, or a 12Vdc element to run off your domestic batteries. The latter will be much lower power (typically 300W) and will take longer to heat the water, but they are a good idea if you have excess solar power to use up during the summer months.
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Hot water systems on boats are powered by the boat engine's heat exchanger when the boat is in motion
To enjoy hot water on a boat, you will need both a pressurised freshwater system and a calorifier. Most modern yachts come with at least a basic cold water system, which can be modified to heat water. The hot water system utilises the same pump and water supply as the cold water system, but the water is piped through a calorifier on its way to the hot tap.
A calorifier can be powered by electricity via shore power when docked or by an onboard generator when on the water. Some calorifiers use an inverter (DC to AC converter) to power the 220Vac element, but this is inefficient and consumes large amounts of battery capacity. For running off electricity, a calorifier can have a 220Vac element for use with mains shore power or a 12Vdc element to run off domestic batteries. The latter will be much lower power and will take longer to heat the water, but it is a good option if you have excess solar power in the summer months.
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Some calorifiers use an inverter (DC to AC converter) to power the 220Vac element
A calorifier is a heavily insulated water tank that is usually made of copper or stainless steel. It is used to heat water on boats. The water is heated by the boat engine's heat exchanger when the boat is in motion. The heat exchanger pushes heat through the water heater's coils, which heats the water within.
A more efficient option is to use a 12Vdc element to run off your domestic batteries. This will be lower power (typically 300W) and will take longer to heat the water, but it is a good idea if you have excess solar power to use during the summer months.
When docked, a calorifier can also be supplied with electricity via shore power or by an onboard generator when on the water.
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Twin-coil calorifiers are available for those who want to circulate hot water from both the propulsion engine and a diesel-fuelled, hot water heating system
A boat's hot water system works in a similar way to the hot water system in your home, but it is powered by the boat engine's heat exchanger when the boat is in motion. The heat exchanger pushes heat through the water heater's coils, heating the water within. The water tank is called a calorifier and is made of heavily insulated copper or stainless steel.
The calorifier can be powered by a 220Vac element when on mains shore power or a 12Vdc element when running off domestic batteries. The latter is much lower power and will take longer to heat the water, but it is a good option if you have excess solar power during the summer months.
Some calorifiers use an inverter (DC to AC converter) to power the 220Vac element, but this is inefficient and consumes large amounts of battery capacity.
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Calorifiers are usually cylindrical and need to be firmly mounted using the supplied brackets
Calorifiers are heavily insulated water tanks made of copper or stainless steel. They are an essential part of a boat's hot water system, which generally looks like a smaller version of the hot water systems found in homes. When the boat is in motion, the boat engine's heat exchanger pushes heat through the water heater's coils, heating the water within. There is also a 110V electric heating element deep within the tank that has the capacity to heat the tank water. This element can be supplied with electricity via shore power when docked or by an onboard generator when on the water.
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Frequently asked questions
A calorifier is a heavily insulated water tank made of copper or stainless steel. It is used to heat water on a boat.
A calorifier uses the boat engine's heat exchanger to push heat through the water heater's coils, heating the water within. It can also be powered by electricity via shore power when docked or by an onboard generator when on the water.
The best way to power a calorifier is via the boat engine's heat exchanger. Some calorifiers can also be powered by an inverter (DC to AC converter), but this is less efficient and consumes large amounts of battery capacity.
