Conventional Boilers

Conventional boilers are often referred to as "heat-only". The High Efficiency models tend to be called "High Efficiency Heat-Only".

In a conventional boiler gas jets play onto a cast iron heat exchanger through which water passes to be heated. If used to supply taps, hot water cannot be provided on demand but must be stored, usually in a copper cylinder. This type of boiler has relatively simple controls and energy consumption can be high but the cost of this is moderated by the low maintenance costs. They are versatile in that they can be used in almost any type of property and can be pumped or gravity fed.