Technical Deep Dive: Understanding Aluminum Window and Door Specifications

Performance Ratings

Important metrics include:

1. U-Factor (Heat Loss)
   • Optimal ranges
   • Rating system
   • Impact on efficiency
   • Regional requirements
   • Cost implications
2. Solar Heat Gain Coefficient (SHGC)
   • Sun exposure impact
   • Energy efficiency
   • Comfort levels
   • Cooling costs
   • Optimal values
3. Air Leakage Ratings
• Testing standards
• Acceptable ranges
• Impact on efficiency
• Certification requirements
• Performance factors