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Curtain wall fire-resistant windows are uniformly classified as Class C non-insulated fire-resistant products. Their core performance indicator only assesses fire resistance integrity. The mainstream specifications on the market offer 0.5-hour and 1-hour fire resistance ratings, fully complying with fire safety codes for exterior curtain walls in most regions worldwide. They have clear usage boundaries with Class A and B insulated fire-resistant windows for interiors; they are only used in the lighting areas of building exterior curtain walls. They do not have the ability to block high-temperature heat radiation and cannot be installed in interior fire-resistant partitions, equipment rooms, or other locations requiring heat insulation protection. In the event of a fire, they can effectively contain open flames and dense smoke, preventing the fire from spreading up and down the curtain wall through gaps, avoiding rapid burning of the entire building facade, and providing sufficient time for evacuation of occupants.
Under normal circumstances, as long as the exterior wall window remains intact (using Class C fire-resistant windows), the possibility of external flames igniting interior items is extremely small. However, in the following special circumstances, it is strongly recommended to use Class A fire-resistant curtain walls with thermal insulation function: The lower floors are shopping malls, warehouses, or other places with extremely high fire loads; The windows on the lower floors are floor-to-ceiling windows or very large; The exterior wall has a breathing curtain wall structure or contains large billboards; The materials and construction of the exterior wall insulation system do not meet the requirements of the "Code for Fire Protection Design of Buildings".
Matching Flame Retardant: When fire-resistant windows made of Class C (non-insulated) fire-resistant glass are used on the exterior walls, it is recommended that interior curtains be made of washable, permanently flame-retardant fabric to reduce the risk of fire.
The product is available in two styles: fixed Curtain Wall Fire-Resistant Window and operable Curtain Wall Fire-Resistant Window, suitable for different curtain wall designs.
The fixed style seamlessly integrates with the curtain wall, offering optimal sealing performance and minimal maintenance. The operable style is equipped with a small temperature-controlled automatic window closing accessory, allowing for daily ventilation.
The window automatically locks when the ambient temperature reaches the critical value of 73 degrees Celsius, preventing damage to the overall fire resistance of the curtain wall due to the opening mechanism.
Both styles are compatible with the three major curtain wall structures: concealed frame, semi-concealed frame, and exposed frame, offering wide applicability.
Fire-resistant curtain wall windows are key components that balance the aesthetics of building facades with fire safety. Based on fire resistance performance, they are mainly divided into insulated and non-insulated types. Insulated fire-resistant windows use composite fire-resistant glass. When exposed to fire, the internal interlayer expands to form a heat insulation barrier, simultaneously meeting the requirements for fire resistance integrity and heat insulation. Non-insulated fire-resistant windows, on the other hand, mostly use single-pane fire-resistant glass, ensuring only fire resistance integrity without heat insulation.
Furthermore, their supporting steel frames must not be coated with fire-retardant paint to ensure coordinated deformation under heat. In practical applications, besides standard scenarios, in special cases such as high fire loads on lower floors, the presence of floor-to-ceiling windows, or inadequate external wall insulation systems, it is strongly recommended to use insulated fire-resistant curtain walls. To ensure fire safety and compliance, the glass panel area must be reasonably controlled during design and construction, mechanical anchoring methods must be used. We have obtained product type test reports and 3C certification documents to ensure the reliability of the overall system.
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