Thermal Performance Certification: Cost vs Value

摘要

Architects and builders primarily involved in residential construction are probably familiar with the National Fenestration Rating Council (NFRC) and its energy rating and labeling system for residential windows, doors, and skylights. However, those involved in commercial construction are considerably less familiar with the organization. Commercial window walls, curtainwalls and sloped glazing systems historically have not been affected by the NFRC's residentially focused programs. However, NFRC is in the process of developing a commercial fenestration rating and certification program, and members of the glass industry are questioning its need and the cost impact it would have for building owners and developers. In 1999 NFRC implemented a site-built rating and certification program to address the commercial building industry. Though the program was based on software simulation tools commonly used in both the residential and commercial fenestration industries, it lacked substantial input from the members of the commercial segment and was met with limited acceptance. NFRC subsequently has acknowledged that the site-built program had "...drawbacks limiting its usefulness."