Energy-Saving Aluminum Alloy Doors and Windows: Key Thermal Insulation Production Points

In the external structure of buildings, aluminum alloy doors and windows are the most sensitive part for heat exchange. Their energy consumption per unit area has reached 5-7 times that of walls, and the heat loss of thermal insulation and energy-saving aluminum alloy doors and windows accounts for more than 45% of the total energy consumption of the entire building. This data has attracted increasing attention with the improvement of building energy-saving standards. To achieve good thermal insulation and energy saving, it is necessary to first understand the key paths of heat loss, which mainly include three types:

• Heat conduction loss through aluminum alloy profiles
• Radiant heat loss through glass panels
• Air convection heat loss through door and window gaps

Therefore, the production of thermal insulation and energy-saving aluminum alloy doors and windows must accurately target these three major pain points, and strictly control from three aspects: profiles, glass, and sealing materials.

I. Analysis of Core Production Points

(1) Aluminum Alloy Profiles: The Key to Blocking Heat Conduction

As good conductors of heat, the profiles of aluminum alloy doors and windows will transfer heat quickly with ordinary profiles. Therefore, the core of thermal insulation and energy saving is to select profiles with thermal break treatment. Many people may ask: “What exactly is a thermal break?” In fact, it is adding PA66 nylon thermal insulation strips in the middle of the profiles, acting as a “barrier” to block the heat conduction path and reduce heat loss from the source. Nowadays, mainstream thermal break profiles will also optimize the cavity structure, combined with multi-cavity design to further improve thermal insulation effect, becoming the basic configuration of thermal insulation and energy-saving aluminum alloy doors and windows.

(2) Glass Selection: The Core Carrier of Thermal Insulation

Glass is the main heat dissipation surface of thermal insulation and energy-saving aluminum alloy doors and windows. Insulated glass has become the first choice due to its excellent performance. The following is a comparison of the performance of common glass types:

Glass Type	Glass Thickness	Cavity Thickness	Core Advantages
Ordinary Insulated Glass	5-8mm	12mm/15mm	Dry and static air layer reduces thermal conductivity, balancing thermal insulation and sound insulation
Low-E Insulated Glass	5-8mm	12mm/15mm	Added Low-E coating reflects infrared radiation, improving thermal insulation effect by 30%
Triple Glazed Insulated Glass	5-6mm	10mm+12mm	Double cavity design, suitable for cold regions with better thermal insulation

Currently, Low-E insulated glass is the most widely used in the market. On the basis of ordinary insulated glass, it adds a low-emissivity coating, which can effectively block solar radiant heat from entering the room while retaining indoor heat, making it the mainstream choice for thermal insulation and energy-saving aluminum alloy doors and windows.

(3) Sealing Materials: The Line of Defense Against Heat Loss Through Gaps

Sealing performance directly affects the energy-saving effect of thermal insulation and energy-saving aluminum alloy doors and windows, and many people easily overlook the importance of sealing materials. The sealant should be weather-resistant adhesive that meets the GB/T 14683-2017 standard, which can resist wind, rain, and ultraviolet erosion and maintain sealing performance for a long time. The sealing strips should preferably be neoprene products with ozone corrosion resistance and ultraviolet aging resistance, or higher-quality EPDM rubber strips.

Special note: The overlapping part of the door and window sash opening must be equipped with three or more sealing strips to form a “multi-channel sealing line of defense”, blocking air convection from the gaps and avoiding heat loss through the gaps.

II. Practical Q&A: Solving Your Practical Concerns

1. Q: Is it cost-effective to replace thermal insulation and energy-saving aluminum alloy doors and windows at home?A: Very cost-effective! Although the initial investment is slightly higher than that of ordinary doors and windows, according to the usage scenario of ordinary families, it can save 30%-40% of the energy consumption costs of air conditioning and heating every year, and the price difference can be recovered in 3-5 years. Moreover, the service life is more than 20 years, which can also improve living comfort.
2. Q: Besides these three points, are there other details to improve thermal insulation effect?A: Yes! For example, choosing multi-point locks to make the doors and windows fit more tightly when closed; filling the installation gaps between profiles and glass with foam rubber; selecting thermal insulation hardware accessories to reduce heat conduction of metal accessories. These details can further optimize the energy-saving effect.

As a company specializing in customized doors and windows, STATE CROWN strictly controls every link in the production of thermal insulation and energy-saving aluminum alloy doors and windows. From profile selection to glass configuration and sealing process, we follow the latest energy-saving standards to create aluminum alloy doors and windows products with both practicality and energy-saving performance for users, making buildings more energy-saving and living more comfortable.