Passivhaus, also known as Passive House, is a rigorous standard for energy efficiency in building design. It originated in Germany and focuses on reducing a building's ecological footprint by making it highly energy-efficient, comfortable, and cost-effective.

When it comes to glazing (windows and doors), Passivhaus standards require careful attention to detail to ensure optimal energy performance. Here's how Passivhaus principles relate to glazing:

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• High-Quality Glazing: Passivhaus buildings typically use triple-glazed windows with low-emissivity coatings (low-e coatings) to minimize heat transfer between the interior and exterior. Triple-glazed windows provide better insulation compared to double-glazed ones, reducing heat loss during colder months and heat gain during warmer months.

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• Thermal Breaks: Passivhaus windows often incorporate thermal breaks, which are insulating materials between the interior and exterior window frames. Thermal breaks help prevent thermal bridging, where heat can transfer through the frame, reducing overall energy efficiency.

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• Airtightness: Passivhaus construction emphasizes airtight building envelopes to minimize air leakage, which can significantly impact energy efficiency. Properly sealed window installations, along with airtight window frames and junctions, contribute to maintaining the desired indoor climate and reducing the need for heating or cooling.

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• Solar Gain Optimization: While reducing heat loss is crucial, Passivhaus design also seeks to maximize passive solar gain, especially in colder climates. This involves strategic placement of windows and glazing to allow solar radiation to enter the building and contribute to heating during colder months. However, careful consideration is needed to avoid overheating in warmer seasons.

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• Shading Strategies: Passivhaus buildings often incorporate external shading elements such as overhangs, louvers, or awnings to control solar heat gain and glare during peak sunlight hours. This helps maintain comfortable indoor temperatures and reduces the reliance on mechanical cooling systems.

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• Quality Installation: Proper installation of windows and doors is critical to achieving the desired energy performance in a Passivhaus building. Attention to detail during installation, including the use of high-quality seals and insulation materials, ensures that the building envelope remains airtight and insulated effectively.

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In summary, Passivhaus principles related to glazing emphasise the use of high-performance windows and doors, careful attention to thermal insulation and airtightness, optimization of solar gain, and implementation of shading strategies to achieve optimal energy efficiency and comfort in buildings.

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For more information on Passivhaus Standards and guidance on compliant products, please contact one of our experts at enquiries@scandicwindows.co.uk