

| Bid Specification for Interior Mounted Removable Storm Windows | |
| Exploded view |
Air Infiltration
Tested by the Vermont Energy Investment Corporation for This Old House.Measured: .07 cfm/ft. _______Test standard: .50cfm/ft.
7 times tighter than the test standard!
Tighter than almost any replacement window costing 3 times as much!
Noise Reduction
Tested by Intertek Testing Services June 1997
ASTM E90-90 Sound transmission loss testSound transmission class was determined to be STC 27 A further test was done by hermetically sealing around the edges with "Dux-Seal"
which only raised it to STC 28, showing that our seals are extremely good.
This test qualified us to supply windows to the Boston Central Artery Project for soundproofing around their construction sites.