Founded in 1935 and based in Wells, Maine, Wasco is one of America’s largest skylighting companies. Wasco specializes in innovative, high-performance skylights for both residential and commercial applications.

Energy Efficient Skylights


Wasco offers a variety of energy efficient skylights for homes and commercial buildings.

For example, their E-Class residential models are available with the following features that improve energy efficiency:

High Performance eMAX3

Wasco’s eMAX3 windows have an outer pane of low-E class triple coated with silver on the interior surface, and are filled with argon. These windows block 95% of UV rays and reduce heat gain by up to 69% (compared to an identical window with 2 panes of clear glass). There is also a Laminated eMAX3 edition that has an inner pane of heat-strengthened laminated glass.

30-30 Triple Glazed

BuildingGreen has applauded Wasco’s 30-30 Triple Glazed Skylight option.Credit:

The “30-30” rating of these windows means that they have a maximum of 0.30 U-factor and solar heat gain coefficient (SHGC). This means that these 30-30 Triple Glazed Skylights provide up to a 55% better insulating value than double-paned skylights with ordinary glass.

Lumira Aerogel

Lumira Aerogel, a trademark of the Cabot Corporation, is a thermal insulator that inhibits heat transfer on the nano-level. Wasco’s skylights with Aerogel have more than double the thermal value of a typical insulated glass skylight.

LEED Credit Overview

According to LEED v4, Wasco’s Triple Glazed Skylights could contribute to the following credits:

Energy and Atmosphere (EA) Prerequisite: Minimum Energy Performance (0 points)

This credit establishes a minimum level of energy efficiency for buildings, based on energy costs. The Wasco skylights could help to improve the building’s energy efficiency and reduce heating and cooling costs, contributing to this credit.

EA Credit: Optimize Energy Performance (up to 18 points)

This credit rewards LEED projects for achieving energy efficiency beyond the minimum set forth in the EA Prerequisite. Points are awarded based on the energy cost savings percentage – the higher the percentage, the greater the number of points awarded. Wasco’s skylights could reduce energy costs, meaning they could potentially contribute to this credit.

Indoor Environmental Quality (IEQ) Credit: Daylight (1 point)

This credit requires daylighting to help increase building occupant productivity. Since skylights increase the amount of daylight, especially in areas that are not close to walls with windows which would allow Wasco’s skylights to contribute to this credit.


Jill Bellenger, ASLA, LEED GA, CPH

Jill Bellenger, ASLA, LEED GA, CPH is a founding principal at 3 Design Consulting LLC. She is a Landscape Designer and Certified Professional Horticulturist, with a focus on the principles of the Sustainable Sites Initiative and LEED. She is an experienced Green Business advocate, with core expertise including conservation landscaping, LEED, graphic design, professional development programming and green building practices. She holds a Bachelor of Landscape Architecture degree from SUNY College of Environmental Science and Forestry in Syracuse, NY and is currently enrolled in the Sustainable MBA program at Green Mountain College. Jill is also an instructor at the Monteverde Institute Sustainable Futures semester in Costa Rica.

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