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PRODUCT SHOWCASE


Cutting waste costs at Tonbridge Grammar


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onbridge Grammar School in Kent, has recently slashed their waste disposal costs, whilst improving their recycling rates, by installing a waste compactor, and cardboard baler from Orwak Environmental Services. Two Sixth Form pupils took the initiative to research ways in which the school could recycle more of their waste, and cut the cost of disposing of general waste. Joanne Griffin and Annabelle Wilkins were instrumental in developing a proposal that was then presented to the School’s Board of Governors. The proposal involved installing a 4100 waste compactor, which reduces the bulk of general waste, in order to minimise the number of waste containers on site, and also minimise the number of waste


Joanne Griffin and Annabelle Wilkins


collections needed. The second part of the proposal recommended the installation of a 3100 baler for neatly and securely baling cardboard waste, in preparation for recycling. David Wells, Bursar of Tonbridge Grammar School, was thrilled with the success of the project, “We’ve been really happy with how the project has panned out. It’s not only provided the 6th Form with some further knowledge about the subject of waste reduction and recycling, but also saved the School a significant amount of money in waste disposal costs, even when taking the machine rental into consideration.”


Now that the cardboard is being baled, it can be sold for recycling, having previously been sent to landfill at £56 per tonne. So not only is Tonbridge Grammar saving money on waste disposal, it’s also able to generate revenue from selling baled cardboard. David Wells continues, “We hope that other schools will follow our example and introduce such a scheme, and be able to reap the same benefits it has brought us.” Email: orwak@phs.co.uk www.orwak.co.uk


Geo-exchange system at Sainsbury’s


upermarket chain Sainsbury’s has taken a major step to reduce its carbon impact with renewable energy based on a geo-exchange system supplied by Greenfield Energy in partnership with Armstrong Integrated. Following a successful trial installation at Sainsbury’s store in Crayford, Greater London, the retailer now plans to roll-out the installation of similar technology at other key stores as part of its carbon reduction strategy. At the heart of the renewable solution is the Geoscart™ ground source heat exchange system designed and supplied by Greenfield Energy. The Geoscart technology involves a subsurface array of closed-loop borehole heat exchangers specifically designed to match the building services design. Drilled at angular displacement (diagonally and/or horizontally) they provide maximum geothermal exchange efficiency whilst occupying minimal surface area. Greenfield Energy has partnered with Armstrong Integrated for the manufacture and delivery of the key Geoscart surface system. Armstrong’s offsite fabrication


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ensured the top-class build quality and reliability of the installed systems. It also guaranteed effective integration of the on- site generation elements with the other energy efficient components such as intelligent variable speed pumps with efficient pumping strategies and advanced controls technology, according to the demanding Geoscart system specifications. This degree of intelligent integration ensures that carbon reductions gained through renewables are fully optimised, and provides Sainsbury’s with a sophisticated surface interface from which it can monitor and manage energy distribution across the system. www.armstrongintegratedsystems.com


Silavent low energy fan range


olypipe Ventilation has launched the first new addition to the Silavent range following its acquisition of the brand last year: a new range of low Watt centrifugal bathroom extract fans. The new competitively priced Silavent


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low Watt fans use an incredible 70% less power than conventional fans, dramatically reducing operating costs and helping to reduce overall building energy consumption, an issue which remains high on the political agenda. In fact, changes to Part L of the Building Regulations require the Specific Fan Power (SFP) to be no higher than 0.5 Watts per litre per second (W/l/s); Polypipe’s range of low Watt fans outperform this minimum standard.


The new range incorporates units suitable for most domestic applications, including decentralised Mechanical Extract Ventilation (dMEV) versions. These include the Curzon 100mm and Mayfair plug-in specification fan, which also features a twin speed dMEV option. The Curzon’s power consumption is 10W at a flow rate of 80m³/h and the Mayfair is 10W hi and 6W low speed at a flow rate of 72 hi and 43 low m³/h respectively. Designed with ease of installation as a key priority, the Curzon and the Mayfair are ideally suited to the social housing and refurbishment market. In particular, the Mayfair unit is well suited to refurbishment applications where existing installed AC units can be simply replaced with a low energy equivalent. Polypipe Ventilation is well placed to offer immediate, practical solutions to revised Building Regulations Parts F & L. The company continues to provide differentiated solutions in the private and social housing sectors, transforming the way developers and specifiers meet emerging environmental standards. For further information, please go to www.polypipe.com/ventilation or contact Polypipe Ventilation on 08443 715523.


PUBLIC SECTOR SUSTAINABILITY • VOLUME 1 ISSUE 3 45


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