Unvented Hot Water Systems

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Dean Evans Plumbing & Heating can install an unvented hot water system such as the Megaflo which is widely regarded as the brand leader in unvented domestic water heating. It offers levels of performance that are quite simply unrivalled by the competition with flow rates of up to 72 litres per minute. Whether it's a single bedsit, a luxury family home or a busy sports club shower complex, Megaflo ensures a constant supply of high power hot water; day in and day out, year after year.

Contact us now for an estimate or more information.

The desire to remove cisterns from the roof space means increasing difficulties in meeting consumer demands for modern designs of high performance hot water systems and in particular the growing market for showers, from traditional open vented systems.

Unvented domestic hot water systems can, however, meet these expectations by utilising regulated cold water supplied directly from the mains to the heated storage cylinder. Included with the cylinder is a package of safety devices and controls to regulate temperature and pressures within the system. This type of system can provide flow rates in excess of 25 litres/min thus meeting BS6700 specification for design flow rates of 18 litres/min whilst retaining the facility for simultaneous draw-off from other hot water outlets.

Unvented hot water systems such as the Megaflo work on a simple principle. The cold-water mains are connected directly to the supply units, (taps etc.) providing balanced hot and cold water throughout the home. This prevents the need for a storage tank in the loft, thus eliminating the associated risk of freezing and contamination. As a result, fitting time and expenses are reduced.

Keeping the hot water generated separate from that required for the heating, of the home results in improved efficiency and economy. This is aided by fitting the correct size unit close to the required point of delivery, (e.g. placing the boiler in the kitchen) thus reducing heat loss through long pipe runs, indeed cutting out the need for long pipes altogether (See Diagram). This solution results in fast, safe, economical hot water supplies, enabling power showers without a pump and delivering balanced hot and cold-water pressures throughout the home.


So feel free to Contact Us at Dean Evans Plumbing & Heating to discuss the merits of having an unvented hot
 water system in your home.

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