Window Energy Performance
For the typical residence in our climate, windows account for 25% of the home’s air conditioning load. The National Fenestration Rating Council (NFRC) operates a voluntary program that tests and certifies windows, doors, and skylights based on their energy performance ratings. The NFRC label can be found on ENERGY STAR® qualified window, door and skylight products.
Windows, doors and skylights can gain and lose heat by direct conduction through the glass or frame, the radiation of heat through the glass and air leakage through and around them. These properties can be measured and rated according to the energy performance characteristics known as the U-Factor and the Solar Heat Gain Coefficient. In this climate, pay attention to the Solar Heat Gain Coefficient (SHGC): the lower the number, the less heat gain. 20s are very good, but teens are great.
Indoor Enviromental Air Quality Tools and Information
Low-Emitting Materials
- Paints and Coatings
- Carpet Systems
- Composite Wood and Agrifiber Products
- Third Party VOC Certification Program for Interior Finish Materials
Daylighting vs. Thermal Comfort
Ventilation
- Air Handling Unit (AHU)
- Energy Recovery System – Mini-Vent
Helpful Indoor Environmental Air Quality Resources
Helpful Indoor Environmental Air Quality Links
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