Indirect Cylinder or Direct cylinder - which to choose?

At Electric Water Heaters, customers often ask us about the distinction between indirect and direct cylinders in electric water heating. The electrical appliance landscape, especially in water heating, can be overwhelming with numbers and industry jargon. We aim to simplify the differences without drowning you in technical details. Here, we'll clarify the differences and assist you in choosing between an indirect or direct cylinder.

Indirect

An indirect cylinder relies on a separate boiler for heating, avoiding the use of its own electric elements. Instead, a heated coil transfers heat to the fresh water in the tank. Indirect units require an external heat source, such as a gas or immersion boiler. Recognizable models like Megaflo label their indirect versions with an 'i' following the literage, while OSO uses 'SCI.' In summary, indirect cylinders use external appliances to provide the necessary heat, with their own immersion as a backup or a boost if necessary.

Now, consider the direct cylinder in contrast:

Direct

A direct cylinder heats water internally using elements within the cylinder, functioning like its own electric immersion. This eliminates the need for an external appliance like a gas or alternative electric immersion heater. Popular models like Megaflo designate their direct versions with a "D," and OSO uses 'SXD.' Direct models require appropriate expansion vessels within the property. To sum up, direct cylinders heat water inside the cylinder with their own elements, delivering usable water on demand.

We hope this concise information proves helpful. Feel free to reach out for further clarification on indirect or direct cylinders, whether for a project, business, or tailored residential needs. Call us at 01934 311800!