Five double-hung replacement window models made by Gorell Windows & Doors have earned the prestigious Green Seal certification. Products earning Green Seal certification are recognized for saving energy compared to traditional windows and being more environmentally preferable because they’re manufactured using quality control practices. Gorell is one of only two window companies to have its products certified by Green Seal, an independent, nationally recognized non-profit green organization based in Washington, D.C.
These certifications reflect the significantly high levels of performance and quality of these Gorell windows, as well as other Green Seal standards pertaining to:
The Green Seal certification process is a long and comprehensive one, and Gorell products were certified only after rigorous testing and evaluation, which included an on-site plant visit. Criteria such as performance ratings (U-value, Solar Heat Gain Coefficient, etc.), product packaging and labeling, and manufacturing and testing procedures all played a role in the Gorell products achieving Green Seal certification.
Other companies that have earned Green Seal certification for their products include:

Click here to learn more about the Green Seal program.


The Green Seal says that a product or service has been tested according to science-based procedures, that it works as well or better than others in its class, and that it has been evaluated without bias or conflict of interest. The Green "Seal of Approval" has come to stand for reliability, fairness, and integrity.
Green Seal's evaluations are based on state-of-the-art science and information using internationally recognized methods and procedures. To earn the coveted Green Seal, a product must meet the Green Seal environmental standard for the category as demonstrated by rigorous evaluation, testing and a plant visit. The Seal provides a business advantage, for it identifies a product as environmentally preferable, provides third-party corroboration of environmental claims, and distinguishes a product from competitors that can't support their environmental assertions.
