What Is a Direct Cylinder

In a direct cylinder, there is no heat exchanger. Instead, the water is heated directly by two immersion heaters. … The lower immersion heater heats the whole cylinder on the cheaper night tariff, and the top one keeps the water up to temperature as it is drawn off throughout the day.

How does a direct cylinder work?

A ‘direct’ cylinder is heated via an electric immersion and does not work with gas, oil or heat pump systems. … The heated coil imparts its heat onto the fresh (potable) water in the tank that is used for washing or showering.

What is the difference between a direct and indirect heating system?

Quite simply, direct heating technology involves a bulk solid material coming into direct contact with a heating gas to change the final temperature of the material. Indirect heat transfer uses conduction, radiation or convection to achieve temperature change. …