|
Blair's Texas Window Tinting and more |
||
|
Film Specification Test Methods |
|
|
|
This below are the test methods the manufacturer used as to how the film's specifications shown on the previous page were derived. This is really a bunch of technical rocket science type information that most wouldn't understand, however we added this page for all those rocket scientists out there needing to know this information in some way shape or form. |
||
|
1. The Total Solar Transmittance and Total Reflectance have been determined from spectrophotometric data on the glazing system. The solar spectrum at air mass two is given by Moon² and reflectance values corrected to absolute have been used. 2. The Visible Light Transmittance and Visible Light Reflectance have been calculated from spectrophotometric data using the C.I.E. standard observer (C.I.E., 1924 and 1931) and D-65 daylight. 3. The Winter U-Value has been calculated in accordance with the methods givin by ASHRAE³. The conditions used were: indoor temperature of 68°F., outdoor of 18°F., indoor air movement by natural convection only, outdoor air velocity 15 m.p.h. and solar intensity of zero. 4. The Ultra-Violet Rejection has been calculated from the Ultra-Violet Transmittance (the passage of Solar Ultra-Violet Radiation from 300 to 380 nm at air mass 2). % UV Rejection = 100% - % UV Transmittance. 5.The Shading Coefficient and Total Energy Rejected were calculated for Summer conditions in accordance with methods given by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). The conditions used were: indoor temperature of 75°F., outdoor temperature of 89°F., indoor air movement by natural convection, outdoor air velocity of 7.5 m.p.h., and solar intensity of 248 BTU/Hr.-ft². 6. All of the data were obtained from typical production materials and are subject to normal manufacturing tolerances. All the given are intended for design use only.
¹ Date: May 12 1980 |
||
