Among all building envelope components, windows have always been the most critical. Walls can be built thick, and roofs can have ample insulation, but if the windows are poorly chosen, hot and cold air will still escape most rapidly through them. Many projects' energy consumption problems stem primarily from their windows.
Low-energy buildings require windows that address three key issues:
First, they must be airtight;
Second, they must prevent heat loss;
Third, ventilation shouldn't negate the first two points.
If windows have poor airtightness, even the most powerful heating and air conditioning systems will be ineffective; if insulation is inadequate, relying on excessive heating in winter and cooling in summer will naturally prevent energy consumption from decreasing; and if ventilation creates drafts, then any supposed energy savings are merely theoretical.
System windows are a fundamental component of low-energy buildings.
Windows truly suitable for low-energy buildings are almost always system windows. The reason is simple: low-energy buildings require long-term stable performance, not just impressive individual parameters.
Heat insulating casement windows are designed as a complete system from the outset: the profile structure, thermal break, sealing system, glass configuration, and hardware system are all considered together, not assembled later. The advantage of this approach is that the airtightness, watertightness, and thermal insulation performance of the windows do not degrade rapidly over time.
Choosing the right glass can significantly reduce energy consumption.
In low-energy buildings, thicker glass isn't always better; the key is choosing the right type. Triple-pane, Low-E coated, and argon-filled glass aren't just for show; they're designed to control radiant and convective heat transfer.
The right glass combination can ensure sufficient natural light while keeping solar radiation within a reasonable range. This allows for warmth in winter without overheating in summer – the ideal state for a low-energy building. Etaifeng's Heat insulating casement window series offers a variety of glass options and can be customized to meet your specific needs.
The sealing system determines whether energy savings are sustainable in the long term.
Many windows perform well initially, but after two or three years, they start to leak air and dust. The problem often lies in the sealing system.
Low-energy building windows typically use three or even four sealing layers, each with a specific function. The key isn't the number of seals, but whether the profile structure can maintain consistent pressure on the seals over time.
Low-energy windows: More than just energy saving, they offer comfort.
Many homeowners who have used low-energy windows report that the biggest benefit isn't energy savings, but comfort. Indoor temperatures are more stable, there are no more cold drafts near the windows, and external noise is significantly reduced, resulting in an overall improved living experience. This is why more and more high-end residences, passive houses, and green buildings are making low-energy windows a standard feature, not an option. Etaifeng has many years of experience in the research and development and production of low-energy window products.
Low-energy buildings aren't achieved with just one product, but windows are undoubtedly the most crucial element. A truly mature low-energy building window solution isn't just about meeting parameters; it's about a comprehensive approach from structure, materials, sealing, and installation to long-term use – a solution that stands the test of time.
As a professional manufacturer with 30 years of production and sales experience, Etaifeng holds top-tier qualifications in architectural curtain walls, aluminum alloy doors and windows, and special construction projects. If you are interested in our Heat insulating casement window products, please contact us via email. If you have the opportunity to visit China, you are welcome to visit our factory.
