Calorifiers: Understanding the basics

Calorifiers are an essential component of a heating and hot water system. They store and heat water, making it available for domestic or commercial use. In this article, we will explore the basics of calorifiers, including their functions, types, and benefits.

What are calorifiers?

Calorifiers are vessels that are used to store and heat water. They are commonly used in heating and hot water systems to provide a constant hot water supply. Calorifiers are also known as hot water tanks or storage tanks. They can be found in various sizes and shapes, depending on the application and the volume of water that needs to be stored.

Functions of calorifiers

Calorifiers have two primary functions. The first is to store hot water, and the second is to heat it. Hot water can be stored for various purposes, such as domestic or commercial use. For example, hot water is used for showering, cooking, and washing in a domestic setting. In a commercial environment, hot water is used for various purposes, such as cleaning, sterilisation, and cooking.

Calorifiers are also used to heat water. Water can be heated using different energy sources, such as gas, electricity, or solar power. The energy source depends on the application and the availability of the energy source. Once the water is heated, it is stored in the calorifier until needed.

Types of calorifiers

There are various types of calorifiers, each designed for a specific application. The most common types of calorifiers are as follows:

Direct calorifiers

Direct calorifiers are designed to heat water directly using an energy source, such as gas or electricity. The energy source heats the water in the calorifier, which is stored until needed. Direct calorifiers are commonly used in domestic and commercial settings.

Indirect calorifiers

Indirect calorifiers are designed to heat water using a heat transfer fluid, such as a boiler or a heat pump. The heat transfer fluid transfers the heat to the water in the calorifier. Indirect calorifiers are commonly used in large commercial or industrial settings.

Plate heat exchanger calorifiers

Plate heat exchanger calorifiers are designed to heat water using a plate heat exchanger. The plate heat exchanger transfers the heat from one fluid to another, heating the water in the calorifier. Plate heat exchanger calorifiers are commonly used in commercial and industrial settings.

Benefits of calorifiers

Several benefits of using calorifiers in a heating and hot water system exist. The primary benefits are as follows:

Energy efficiency

Calorifiers are energy-efficient devices that can help reduce energy costs. They store hot water, reducing the need for continuous heating. They also use energy sources, such as gas or electricity, more efficiently, reducing energy waste.


Calorifiers are cost-effective devices that are relatively inexpensive to purchase and install. They also have low maintenance costs, making them an ideal choice for heating and hot water systems.


Calorifiers are versatile devices that can be used in various settings. They can be used in domestic, commercial, and industrial environments, making them an ideal choice for multiple applications.


Calorifiers are reliable devices that provide a constant supply of hot water. They are designed to last many years and require little maintenance, making them reliable for heating and hot water systems.

Contact Combustion and Heating Systems for details

Combustion and Heating Systems is a reputable hot water boiler and gas burner company founded in 1990 and provides prompt, friendly, and personalised service. Our team has a wealth of experience and knowledge to share with our clients.

Combustion & Heating Systems can help you maximise the performance and efficiency of your calorifier while lowering your operating costs. We specialise in installing, maintaining, and repairing calorifiers at competitive rates.

Contact us today if you have any questions about calorifiers. Furthermore, we offer a diverse range of specialised industrial heating equipment, including hot water circulating pumps, hot water and steam boilers, gas burners with COCs, expansion tanks, burner control boxes, oil pumps, nozzles, valves and pressure switches, solenoids, and more.

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