What is the difference in light transmittance between low-e and clear storm windows?
Top. Storm windows over single-pane windows have similar VT (visible transmittance) properties as dual-pane windows. You can find typical VT numbers for different glazing types on the Efficient Windows Collaborative Web sitem. Typical low-E coatings for storm windows have similar characteristics as high-solar-gain low-E coatings in regular windows. As you can see on the site, the typical center of glass VT of high-solar-gain low-E dual pane is 0.75, compared to 0.81 VT for dual-pane clear glass. So at the center of glass, you can expect 5-10% VT reduction from the low-E coating on storm windows over clear single-pane windows. 7. Who manufactures the low-e storm windows? Top. Any storm window manufacturer can use low-E glass for their storm windows. By switching their glass orders to low-E, manufacturers can quickly make that change. Yet not all storm window manufacturers offer low-E because traditionally there hasn’t been much awareness of this option. But as demand increases due to la
