has been rigorously tested by independent laboratories on every aspect
of its performance, over a span of twenty years. This is a summary of
R-value of 4.8 in combination with single pane window, as determined by
M. Yellott Laboratories, Arizona, in
tests performed August 5, 1982.
Heat loss reduction of 412.5 btu/hr/ft sq (from 687.0 to 274.5) when
applied to single pane window. 60% net reduction of heat transfer. As
determined by Architectural
Testing Inc., York, PA, in tests
performed January 28, 1985
Less than .01 cfm/lineal foot crack space, compared to DOE standard for
storm windows of 2.0. Tested with 25 mph wind equivalent at The
Associated Laboratories , Dallas,
using ASTM E-283 test method. Similar results at the John
M. Yellott Laboratories, above.
STC rating improves from 18 to 28 when Magnetite
is added to single hung window. 19.2 sound decibel reduction, effective
reduction of over 70%. Particularly effective in 1000 Hz range. As
determined by Riverbank Acoustical Laboratories, Illinois, in tests
performed April 22, 1988.
Ultraviolet light waves between 300 and 355 reduced by 99.1% when
passing through acrylic sheet. UV light waves between 360 and 375
reduced by 66.2%. As determined by DSET Laboratories, Inc., Phoenix, in
tests performed October 31, 1986.
Glass versus acrylic thermal
Glass---5 to 6 btu/hr/sq ft/°F, according to CRC Handbook of Chemistry
Acrylic---0.7 to 1.7 btu/hr/sq ft/°F, according to Handbook of Plastics
(indicates that acrylic is 3 to 8 times more thermally
insulating than glass)
Magnetic Holding Force
12.0 lb/lin. ft, commercial grade9.0 lb/lin. ft, residential grade
according to Manufacturer