Creating Hermetically Double Glazed Sealed Units

At Glasscraft, we specialise in creating high-quality double glazed sealed units that provide superior thermal insulation and energy efficiency for your home or office. A double glazed sealed unit consists of multiple panes of glass separated by air or gas-filled cavities and sealed hermetically (airtight) around the edges. This sophisticated construction significantly enhances the thermal performance of windows, reducing heat loss and improving comfort.

Understanding Heat Loss in Double Glazed Sealed Units

Heat loss in double glazed sealed units occurs through three primary mechanisms: conduction, convection, and radiation. Understanding these mechanisms can help you appreciate the advanced design of our double glazed sealed units and their benefits.

1. Conduction

Conduction is the process by which heat is transferred through the materials that make up the sealed unit—glass, air or gas in the cavity, spacer bars, and sealants. Heat moves from the warmer side of the unit to the cooler side via direct contact with these materials.

2. Convection

Convection occurs within the air or gas cavity of the sealed unit. The rotating air or gas inside the cavity carries heat from one pane of glass to the other, creating a convection current. This process can lead to heat loss, especially if the cavity is too large.

3. Radiation

Radiation is the transmission of heat through the glass in the form of infrared energy. This type of heat loss can be mitigated by using low-emissivity (low e) coatings, which reflect radiant heat back into the room, thereby reducing the overall heat loss.

Optimal Design for Double Glazed Sealed Units

For optimal performance, the cavity between the panes of glass in a double glazed sealed unit should be 16mm. Research shows that a 16mm cavity strikes the perfect balance between reducing conduction and minimising heat loss due to convection currents within the unit. A cavity larger than 16mm can increase heat loss through convection, while a smaller cavity can increase heat loss through conduction.

The edges of double glazed sealed units, where the panes join the window frame, are particularly prone to heat loss. This is due to the ‘thermal bridge’ created by the spacer and sealant system that holds the panes together. Heat is conducted across this bridge, leading to greater heat loss at the edges compared to the centre of the unit.

Enhancing Thermal Performance

At Glasscraft, we incorporate several advanced technologies to enhance the thermal performance of our double glazed sealed units. These include:

• Warm Edge Spacer Systems: These spacers reduce heat loss at the edges by using materials with better insulating properties than traditional metal spacers.
• Inert Gas Filling: Filling the cavities between the glass panes with inert gases like argon or krypton further reduces heat loss by conduction and convection.
• Low Emissivity Glass: Using high-performance low e glass types helps to reflect radiant heat back into the room, reducing heat loss through radiation.
• Triple Glazing: For even greater insulation, we offer triple glazed units. These units add additional panes of glass and cavities, significantly enhancing thermal performance.

Benefits of Double Glazed Sealed Units

By choosing Glasscraft’s double glazed sealed units, you can enjoy numerous benefits:

• Improved Energy Efficiency: Reduced heat loss means lower energy bills and a smaller carbon footprint.
• Enhanced Comfort: Better insulation keeps indoor temperatures more stable, creating a more comfortable living or working environment.
• Noise Reduction: The multiple layers of glass and gas-filled cavities also help to reduce external noise, creating a quieter indoor space.
• Increased Property Value: High-quality double glazed sealed units can enhance the overall value of your property by improving energy efficiency and comfort.

Sourcing double glazed sealed units from Glasscraft is a smart choice for any trade professional looking to provide their customers with superior thermal performance and energy efficiency. Our expertise in creating hermetically sealed units ensures that you receive the best products that enhance insulation and comfort. By incorporating our double glazed sealed units into your frames, you can offer top quality solutions to the public, improving energy efficiency, reducing noise, and increasing property value. Partner with Glasscraft to deliver the best in double glazed sealed units and meet the growing demand for energy-efficient, high-performance windows. Contact us today to learn more about our products and how we can support your business needs.