26 Ventilation
testing to EN 12210 and EN 12211. For this testing, wind deflection results are grouped into Classes of A, B and C, with A being the lowest standard. Pressure, meanwhile, is grouped into 5 Classes: again, Class 1 is the lowest level of performance.
Thermal protection
Another relevant property of skylights regarding environmental impacts is thermal protection. The total energy transmittance, or g-value for short, is used as a measure of the energy transmittance of components such as glazing. This common value expresses what percentage of the energy striking a glazing unit reaches the
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Fire Glass UK has built up an enviable reputation to become one of the nation’s leading fi re-rated and specialist safety glass suppliers, with an expert installation team on-hand to make sure any projects are glazed to Firas standards. Supplying fi re-rated, acoustic, laminated and toughened glass and offering a specialist cut-size service for glass partitions, partnering industry experts to deliver integral blinds in IGUs and supply manifestations for a complete fi nish. Fire Glass UK strive towards excellence by building their working principles around SQS The Fire Glass Promise; Safety, Quality and Service and believe this is the formula to building trusted working relationships. Fire Glass UK care about getting it right – every time. With lots of industry confusion and regulation changes, Fire Glass UK believe their technical support is an essential asset to their customers to ensure safety is met at all times. Investing in the right supplier with the same vision on safety, quality, and service can ensure a project is complete to the best possible standards. Fire-resistant glass must only be used as part of a previously approved glazing system. There is no second chance with safety. Make sure you get it the right fi rst time.
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inside. Simply put: How much of the heat radiation reaches the inside of the building. The g-value is a number between 0 and 1 – the lower the total energy transmittance, the lower the heat input. There is a difference between summer and winter thermal insulation. This is because in summer the heat should be kept outside, whereas in winter the heat radiation of the sun should be let in. That’s why it is desirable to have the lowest possible figure in summer, whereas in winter, the opposite is necessary. In addition to the possibility of using special sun protection glass, interior and exterior shading can also be considered.
The benefits of well-designed ventilation levels to the internal environment of a building are well documented. Due to the variety of skylight designs and combined opening options now available to use within an overall building construction, skylights are an extremely efficient method of introducing adequate ventilation to an internal space. Natural ventilation improves the quality of air within a building. Good levels of ventilation impact directly on individuals’ performance and health and well-being. This is particularly beneficial during hot summers. Both natural ventilation, and smoke ventilation can be implemented in any type of building with vented roof lights such as modular skylights, glass atria or barrel vault rooflights. With climate change increasing the chance of extreme weather events, architects should ensure that specified building components are both durable and function in a way to protect against such environmental impacts by conforming to relevant standards.
Natalie Goodridge is marketing manager at Lamilux UK
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ADF MARCH 2022
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