Hot water cylinders, tanks, or water heaters are essential for plumbing systems. They store and heat water for various domestic and commercial purposes. Hot water cylinders come in different sizes, configurations, and energy sources, including electric, gas, and solar. The two main types of hot water cylinders are:

Vented Hot Water Cylinders

These cylinders are connected to an open vent pipe that allows cold water to flow in from the mains and hot water to be dispensed from the top. They are suitable for low-pressure water systems.

Unvented Hot Water Cylinders

These cylinders are sealed and connected directly to the mains water supply, allowing higher-pressure hot water delivery. They are suitable for high-pressure systems and can be more energy-efficient.

Heat pump cylinders are a specific type of hot water cylinder designed to work with heat pump systems. A heat pump uses the surrounding air or ground to extract heat and transfer it to the water within the cylinder.

Here's why heat pump cylinders are considered energy-efficient:
Heat pumps are powered by electricity, making them ideal for homes looking to lower their dependence on fossil fuels and their carbon footprint.
Heat pumps can achieve a high COP, producing more heat energy when rated with the electrical energy they consume, making them efficient at heating water.
Using the ambient temperature of the surroundings, heat pump cylinders consume less electricity, resulting in lower operational costs.
While heat pump systems may have higher upfront costs, their energy savings can lead to a relatively quick payback period.