When 189 nations signed the Millennium Declaration in September 2008, consenting to adopt the eight development targets and take steps to achieve them by 2015, many of us enthusiastically welcomed the notion of launching into an idealistic new future, only to turn our backs on the Declaration seconds later and continue with our busy lives. Particularly when it came to Goal Number Seven: ‘ensure environmental sustainability,’ we nod, right, great idea! Government, you do something about it.

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Introduced in 2005 the new Building Regulations Part L has changed the scene as far as boilers are concerned. According to the new requirement, all boilers replaced or installed must be of high efficiency rating. This includes condensing and combination boilers which utilize a larger heat exchanger (or a secondary heat exchanger) to recoup some of the heat that would normally be released into the atmosphere with the exhaust gases. Since some of the energy can be reused, the boiler can generate the same amount of heat with less fuel.

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Solar Photovoltaic (PV) panels are designed to absorb the sun’s energy and then use that energy to power your home or office building. They use a sophisticated structure of silicon wafers which react when light photons hit them and become chemically unstable. This reaction releases electrons in one direction and protons in the opposite direction which eventually leads to an electrical current that can be then fed into domestic or commercial uses. Solar PV panels are already used commonly in calculators and watches and now the larger panels are becoming very popular among people who are looking for alternative methods of powering their homes and office buildings. Several large organisations are big supporters of solar PV, including the National Grid that has been getting some of its power from solar photovoltaic panels.

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