What is the primary function of a lagging jacket on a hot water cylinder?

The primary function of a lagging jacket on a hot water cylinder is to provide thermal insulation. This insulation helps to minimize heat loss from the water inside the cylinder, ensuring that the water remains hot for longer periods without requiring additional energy input. By retaining heat efficiently, it not only enhances energy efficiency but also reduces the operational costs associated with heating the water, contributing to a more environmentally friendly system.

In a well-insulated system, the temperature of the water remains stable, allowing consumers to enjoy hot water on demand while reducing the workload on the heating system. This makes the lagging jacket a crucial component in energy conservation and maintaining the desired water temperature within the hot water cylinder.