EHC electric heating cylinders

Electric Heating Company cylinders models and systems

Faults we diagnose

A cylinder can be blamed when the actual fault sits in the electrical supply, Economy 7 switching, immersion heater, thermostat, wiring, motorised valve, boiler/heat-pump heat source, pressure controls or discharge arrangement. We test the relevant system before recommending a replacement.

Installation and replacement

For replacement we check usable cupboard space, cylinder capacity, mains pressure and flow, discharge route, direct versus indirect heat source, electrical circuit, immersion strategy and future plans such as solar PV or a heat pump. In London flats we also plan access, leasehold constraints and compact/slimline options where relevant.

Direct electric and Economy 7 cylinders

Direct cylinders commonly use one or more immersion heaters. In an Economy 7 property the lower immersion is often arranged for off-peak heating while an upper immersion provides a boost. If the overnight hot water disappears but boost still works, the fault may be in the off-peak supply, switching, circuit, thermostat or immersion element rather than the cylinder shell.

Unvented safety and servicing

Unvented systems operate with safety controls and discharge arrangements that must remain functional. Servicing is more than checking for leaks: controls, valves, expansion provision and the discharge path are inspected in line with the system type and current manufacturer instructions. We do not bypass safety devices to keep a cylinder running.

Related pages

Manufacturer status

EHC cylinder packages and electric-heating systems

The Electric Heating Company's products can combine electric wet heating with stored hot water, so an EHC cylinder enquiry is often part of a wider electric-boiler system rather than an isolated tank.

We identify whether the cylinder is direct electric, indirectly heated by an EHC boiler, or part of a packaged system such as a Comet installation. That distinction determines whether an electrical immersion test, boiler diagnosis or hydraulic/control check comes first.

Replacement as a system decision

If a packaged EHC system is being modernised, replacing only the cylinder may not be the best route. Boiler condition, controls, cylinder capacity and available cupboard space are assessed together.