RICHARD WALKER, explains why the changes to Part L of the Building Regulations were necessary and how they affect the selection of boiler plant.
Sales of condensing boilers to in the commercial market are approaching 50% — but STUART PURCHASE is concerned that they are not able to realise their full potential.

Beyond weather compensation

20 January, 2007
Do you fancy reducing your heating bills by 20 per cent? PETER JENNINGS believes he has the answer.
There are undoubted benefits to installing condensing technology in existing buildings, but it is a much more complex matter than simply swapping over the boiler says STEPHEN LAWS.
As part of its obligation to meet the Welsh Housing Quality Standard introduced by the Welsh Assembly in 2002, Torfaen County Borough Council in South Wales is working with boiler manufacturer Glow-worm to replace boilers in its housing stock of some 8500 units.
CCL Lindab now offers a stainless-steel flue system for commercial and domestic applications. It can be used with gas- or oil-fired boilers and industrial air heaters.
Integrated into the environmentally aware services of Fifteen Cornwall, the restaurant inspired by Jamie Oliver at Watergate Bay near Newquay, are high-efficiency boilers and calorifiers from Clyde Energy Solutions.
A total of 19 Hoval gas-fired condensing boilers have been installed at the Emirates Stadium of Arsenal Club to serve heating and hot-water systems. Key factors in the specification of the Ultragas AM-c 500 boilers by consulting engineers Buro Happold were their high efficiency and compact design, optimising the use of plant-room space.
Viessmann has expanded its capabilities in the market for biomass-fuelled boiler and CHP with the acquisition of Austrian manufacturer Mawera. This company has a turnover of E30 million and has been awarded prizes for innovation by the Austrian and Bavarian state governments.
To simplify installation, Hamworthy Heating has improved the water manifold kits used with its Wessex ModuMax range of gas-fired boilers.
Social housing in the north west of England is being refurbished using high-efficiency boilers supplied by Ferroli. The company is working with the property services division of Progress Housing Group and is supplying condensing combination boilers from its Optimax and Maxima ranges, together with a service package that includes next-day call out, free training for Progress’s gas heating engineers and sponsorship of its apprenticeship scheme.
The Dimplex Ascari fully modulating electric boiler for domestic heating systems does not require a flue and is said to be ideal for heating smaller properties — especially in multi-occupancy buildings where the design does not allow for gas ventilation but wet radiators are the preferred choice. It is said to be ideally to areas offering Economy 10 and other similar tariffs.
As part its Decent Homes programme, the London Borough of Greenwich has installed Vaillant ecoTEC plus high-efficiency combi boilers to modernise 36 maisonettes. They were installed by K&T Heating services and flued using Vaillant’s variable termination kits, enabling the flue outlet to be resited away from the boiler to reduce the impact of nuisance pluming.

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