Double inward-opening aluminum alloy fire-resistant window

Proper installation/maintenance preserves performance. Certified technicians must install: anchor frames with fire-resistant stainless steel fasteners, seal frame-wall gaps with intumescent sealant (not generic caulk) to block fire leaks. Align sashes precisely—misalignment causes gaps that weaken fire seals or hinder operation. Adjust locks/hinges for tight closure. Bi-annual inspections check frames (corrosion/loose fasteners), sashes (warping), seals (wear/hardening), glass (cracks/delamination), and hardware (smooth operation). Clean with mild non-abrasive cleaners/soft cloths; support sashes fully when cleaning to avoid hinge strain. Damaged parts (cracked glass, faulty locks) need manufacturer-approved replacements—generic parts void fire ratings. Never modify (cut/drill) post-manufacturing, as it ruins the fire system, like altering bulletproof glass compromises its ballistic resistance. With care, they last 25–30 years, a cost-effective safety investment.a cost-effective safety…