We require smoke exhaust vent plates meeting the following specifications:  

Material: Galvanized Steel / Stainless Steel  
Compliance: NFPA 92 / EN 12101 standards  
Fire Rating: Minimum 2-hour certification  
Construction:  
- Neck Size: 1125 mm x 525 mm  
- Surface Size: 1175 mm x 575 mm  
- Duct Connection: 750 mm x 750 mm  
- Cutout Size: 770 mm x 770 mm  

Features Required:  
? Integrated louvers system  
? Complete mounting frame with accessories  
? DC24V local actuation switch  

Quantity: 228 units  
Installation Requirements:  
- Ceiling-mounted configuration  
- Air-tight installation per manufacturer guidelines  
- Full fire performance compliance  

Delivery Requirement: 3 weeks after order confirmation  

Please provide:  
1. Technical specifications sheet  
2. MOQ and unit pricing  
3. Certifications documentation  
4. Installation manual reference