TY - CONF T1 - Performance Criteria for Residential Zero Energy Windows T2 - 2007 ASHRAE Winter Meeting Y1 - 2007/01// A1 - Dariush K. Arasteh A1 - Howdy Goudey A1 - Yu Joe Huang A1 - Christian Kohler A1 - Robin Mitchell AB - This paper shows that the energy requirements for today's typical efficient window products (i.e. ENERGY STAR products) are significant when compared to the needs of Zero Energy Homes (ZEHs). Through the use of whole house energy modeling, typical efficient products are evaluated in five US climates and compared against the requirements for ZEHs. Products which meet these needs are defined as a function of climate. In heating dominated climates, windows with U-factors of 0.10 Btu/hr-ft2-F (0.57 W/m2-K) will become energy neutral. In mixed heating/cooling climates a low U-factor is not as significant as the ability to modulate from high SHGCs (heating season) to low SHGCs (cooling season). JF - 2007 ASHRAE Winter Meeting CY - Dallas, TX U1 -

Windows and Daylighting Group

U2 - LBNL-59190 ER -