Heatrae 95050471 Sadia Megaflo Eco 250DDD Direct Unvented Hot Water Cylinder
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Description
The Heatrae Sadia Megaflo Eco 250DDD 95050471 is a nominal 250-litre direct unvented hot water cylinder. It heats stored water electrically using three factory-fitted 3kW immersion heaters, providing a combined rating of 9kW at 240V.
As a direct cylinder, it does not depend on a boiler-fed heating coil. It is an option for homes where electricity provides the domestic hot water, subject to an installer confirming the storage capacity, electrical supply and incoming water performance.
What makes the 250DDD different?
The 250DDD has three immersion heaters, compared with the two fitted to the 250DD. This gives it a higher available heating input when all three elements are energised.
The manufacturer publishes an 81-minute heat-up time at 9kW under its test conditions. Actual heating time depends on the starting water temperature, supply voltage, controls and the number of elements operating.
Each immersion heater has its own thermostat and thermal cut-out, providing temperature control and protection against thermostat failure.
Internal expansion helps keep the installation compact
Megaflo Eco accommodates heated-water expansion through an internal air-gap system with a floating baffle. This removes the need for a separate external vessel for the cylinder’s own hot water expansion, helping reduce external components and pipework.
The inner vessel is manufactured from duplex stainless steel, while the immersion heaters use titanium elements. A 60mm layer of polyurethane insulation helps limit heat escaping from the stored water.