Belfast company wins Ashden Award for solar thermal innovation

Willis Renewable Energy Systems, solar thermal
Installed next to the original water cylinder, the Solasyphon reduces the cost of adding solar thermal hot water to a home.

Willis Renewable Energy Systems of Belfast has won an Ashden Award, the world’s leading green energy awards, for its Solasyphon system. It speeds up and simplifies the retrofitting of solar water heating in domestic premises by avoiding having to buy a new water cylinder.

Since production began in 2007, the company has sold over 2500 Solasyphons, and is now selling over a thousand a year.

Solasyphon acts as a heat exchanger between the solar thermal panels and the hot-water cylinder and reduces capital costs from £650 to £1300. They take up very little space and have been accepted by the Microgeneration Certification Scheme, allowing access to grants and the forthcoming Renewable Heat Incentive.

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