1 Based on STC testing performed by an independent laboratory of a Larson I200 window installed with a 2" airspace over a wood primary window with 1/8” glass and 3/4” insulated glass with two panes of 1/8” glass. Actual results may vary based on the existing window and types of noise present.
2 Based on air leakage testing performed by an independent laboratory of a Larson I200 window in accordance with AERC 1.2 Physical Test Methods for Measuring Energy Performance Properties of Fenestration Attachments. Actual results may vary based on the existing window.