Fenestration: all areas (including the frames) in the building envelope that let in light, including windows, plastic panels, clerestories, skylights, doors that are more than one-half glass, and glass block walls.
— ASHRAE Standard 90.1
O'Neil Junior/Senior High School - Walton Central School District

O'Neil Junior/Senior High School - Walton Central School District

Minimum energy performance requirements for fenestration are defined by the International Energy Conservation Code in terms of U-value and solar heat gain coefficient (SHGC).  Limitations to air leakage are also included.  Bell & Spina considers these along with the wind loading and deflection requirements of the International Building Code when designing new fenestration and/or incorporating replacements into a retrofit project.  The hardware should be exterior grade, resist corrosion, and meet the security requirements of the building owner and the access requirements of the building code.  It should also be consistent with the overall aesthetic of the façade design.  We are experienced in working with regulatory agencies to achieve approval of our designs for historically significant projects.                                          

          - Neil W Garry, PE, RRC, REWC, BECxP, CxA+BE