%0 Conference Paper
%A Joseph H Klems
%A H Keller
%B 1987 ASME Solar Energy Division Conference
%C Honolulu, HI
%D 1986
%G eng
%L LBL-22149
%T Measurement of Single and Double Glazing Thermal Performance under Realistic Conditions Using The Mobile Window Thermal Test (MoWITT) Facility
%1 <p>Windows and Daylighting Group</p>
%2 LBL-22149
%8 03/1987
%X <p>The thermal performance of single glazing, clear double glazing, and double glazing with a low-emissivity coating was measured in both south-facing and north-facing orientations under realistic field conditions using the new MoWiTT field test facility. The time-dependent net heat flow through each fenestration was found to be consistent with the predictions of the standard simplified heat transfer model, provided that an angle-dependent shading coefficient is used and diffuse solar gain is included in the calculation. Summer-condition average U-values were derived for each glazing type and were found to agree with the expected values for both types of double glazing. The measured U-value for single glazing was lower than predicted.</p>