A thermal spacer, also known as a warm edge spacer or simply a spacer bar, is an integral component of a double glazed unit (DGU). It is used to separate the two panes of glass at a specific distance from each other and to seal the space between them to create an insulated barrier. Here's more detail about thermal spacers and their role in double glazing:
Functions of a Thermal Spacer
Maintains the Gap: It maintains a consistent gap between the two panes of glass, ensuring the integrity and performance of the double glazed unit.
Prevents Condensation: By creating a sealed space between the glass panes, it helps to prevent condensation within the unit.
Insulates the Edge: It helps to insulate the edges of the glass panes, reducing heat transfer through the edges of the window and improving the thermal performance of the window.
Types of Thermal Spacers
Different types of materials can be used to create thermal spacers, and they can have different thermal insulating properties:
Aluminum Spacers: Traditionally, spacers were made of aluminum. While aluminum is strong and durable, it is also a good conductor of heat, which can somewhat reduce the thermal insulation properties of the double glazed unit.
Warm Edge Spacers: These are modern spacers made from materials with better thermal insulating properties than aluminum. They can be made from a variety of materials including:
Stainless Steel: Has lower thermal conductivity compared to aluminum, offering better insulation.
Composite Materials: These include a combination of materials such as foam and plastic, designed to offer superior insulation at the edges of the double glazed unit.
Swiggle Seal Spacers: These are a type of warm edge spacer made from a flexible, insulating material. They help in reducing heat transfer and are also used to prevent the formation of condensation at the edges of the glass panes.
Benefits of Using Thermal Spacers
Improved Thermal Performance: By reducing heat transfer at the edges of the glass panes, thermal spacers can help to improve the overall thermal performance of a double glazed unit, making it more energy-efficient.
Reduced Condensation: By creating a better-insulated barrier between the glass panes, thermal spacers can help to reduce the formation of condensation within the double glazed unit, which can prolong the lifespan of the unit.
Comfort: By improving the insulation properties of the double glazed unit, thermal spacers can help to create a more comfortable living environment, with less variation in temperature near the windows.
Energy Savings: By enhancing the thermal performance of double glazed units, thermal spacers can contribute to energy savings by reducing the need for heating and cooling.
Installation
The installation of thermal spacers requires precision and expertise, as the spacer needs to be perfectly aligned and sealed to ensure the performance of the double glazed unit. It is generally recommended to have double glazed units installed by professionals to ensure the correct installation of thermal spacers and other components.
In summary, thermal spacers are a crucial component in double glazed units, playing a vital role in maintaining the gap between the glass panes and improving the thermal performance of the window.