It heats its stored water using an internal heating element rather than receiving heat through a boiler coil.
Electric Heated Stored Hot Water
When stored hot water is heated directly rather than by a boiler coil, the cylinder type matters. MacBlair’s direct-water-cylinder page lists Warmflow unvented models in 90 and 180 litres. The smaller capacity may fit a different demand and cupboard space from the larger model; check the household’s hot-water use before selecting either.
Direct cylinders use an internal electrical heat source, so electrical supply, controls and recovery time are part of the specification. They are distinct from an indirect boiler-fed arrangement. The listed models are unvented, which also makes incoming mains flow and the safety package important.
Measure access routes as well as the final cylinder location. A qualified installer should confirm the electrical work, discharge route and correct water connections before commissioning. Consider the expected use at showers and other outlets rather than choosing capacity by floor area alone.
Direct Water Cylinders FAQs
No. Direct describes how the water is heated; unvented describes its mains-fed, pressurised arrangement.
Assess peak hot-water demand, recovery time and available space. A qualified installer can size the cylinder.
A direct electric-heated cylinder does not need a boiler coil to heat its water, though the wider home system may include a boiler.
Use a suitably qualified installer who can fit and test the safety and electrical components.