Sargent 8225-ET Grade 1 Dormitory Exit Function Mortise Lock with Heavy Duty Single Cylinder DeadboltIndustry Benchmark Heavy Duty Mortise Lock SolutionThe Sargent 8225-ET represents the industry benchmark for maximum security, performance, and durability in commercial door hardware. This Grade 1 dormitory exit function mortise lock features a multi-functional lock body with 2 3/4" backset, 1 3/4" door thickness compatibility, and 3/4" latchbolt throw for reliable operation. Built with heavy-duty lever-style construction and patented design, this mortise lock integrates with all SARGENT key systems including Degree, Signature, KESO, and XC for comprehensive security management.Professional Features & Benefits Exceptional Durability: UL Cycle Above and Beyond test completed at 16 million cycles (Verification ID: V584148) demonstrating superior longevity and reliability in high-traffic applications. Precise Door Compatibility: Designed for 1 3/4" door thickness with 2 3/4" backset and 3/4" latchbolt throw for reliable mortise lock operation. Heavy-Duty Construction: Patented design and construction with robust components engineered for maximum security and performance in demanding commercial applications. EcoFlex Technology: Advanced electromechanical functions utilize EcoFlex technology creating up to 89% energy savings and operating from 12 to 24VDC power supply. Universal Key System Integration: Integrates with all SARGENT key systems (Degree, Signature, KESO, and XC) for flexible security management across facilities. Fire-Rated Performance: UL 10C Fire-Rated up to 3 hours with UL-cUL listing and NFPA 80 compliance for life safety applications. Comprehensive Certifications: ANSI/BHMA A156.13 Series 1000 Operational Grade 1, ADA compliant, and multiple environmental certifications including ASTM E330, E1996, E1886, and TAS 201/202/203. Manufacturer Warranty: 10-year limited warranty with 2-year coverage on electrical components for added confidence and protection.Technical Specifications Refer to manufacturer documentation for complete technical specifications.Installation & Operation Review manufacturer specifications and verify door preparation requirements including 1 3/4" door thickness, 2 3/4" backset depth, and handing as applicable to this product. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for mortise lock installation. Prepare door and frame by drilling required holes and routing mortise pocket as specified in manufacturer instructions. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion with 3/4" latchbolt throw. Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.Professional Applications Commercial Office Buildings Educational Facilities Healthcare Institutions Retail Establishments Industrial and Warehouse Facilities Multi-Tenant Residential Properties Government and Municipal BuildingsWhy Choose Sargent Quality?Sargent 8200 Series mortise locks deliver professional-grade reliability with patented heavy-duty construction tested to 16 million cycles for exceptional durability. The 10-year limited warranty with 2-year electrical component coverage demonstrates the manufacturer's confidence in long-term performance. Engineered for demanding commercial applications where dependable security and operational reliability are essential.