New Resource Can Aid Window Companies in Energy Audits

August 24th, 2012 by DWM Magazine

A new resource is now available to assist window companies that are offering energy audit services. The Building Performance Institute Inc. (BPI) published BPI-1100-T-2012 Home Energy Auditing Standard, designed to provide the protocols to conduct a building-science-based evaluation of existing, detached, single-family dwellings and townhouses that meet specific criteria detailed in the standard’s scope.

The new standard also includes a number of references to doors and windows. For example, under the “Indoor Air Quality and Ventilation” section, the standard provides certain exceptions it says can reduce or eliminate the need to install a whole-building ventilation system. It notes that “whole-building ventilation systems aren’t required for homes without mechanical cooling in International Energy Conservation Code (IECC) Zones 1 and 2 or for homes that are conditioned for less than 876 hours per year. These exceptions all require that the local jurisdictional authority determines that windows are an acceptable method of ventilation (ASHRAE Standard 62.2 – 2010, Section 4.1).”

In addition, under “Building Enclosure Performance,” the standard notes that energy audits must include an evaluation of the performance of the building enclosure and include recommendations for upgrades as appropriate. According to the standard, this includes evaluating window performance and fit by testing operation. Also noted is an estimation of U-factors and solar heat gain coefficients of doors, windows and skylights, including “evaluation of the feasibility and energy savings for window treatments, interior and exterior,” and “evaluation of window improvements in thermal resistance and/or exterior shading devices.”

The next step for BPI is to have the standard published by the American National Standards Institute (ANSI). According to the announcement, a public comment period for the ANSI process will open in the near future.

 

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