Keystone’s third party certification, inspection and quality assurance programs enable manufacturers to demonstrate compliance with many energy-efficiency programs. These include the ENERGY STAR program, regional building codes, marketing claims, and utility and tax rebate programs.

The Good Housekeeping Seal

Reaching the highest standards of quality – For more than a century, the Good Housekeeping Seal has been considered a mark of superior product quality and excellent customer service. The Good Housekeeping Seal provides an additional two-year money-back guarantee

National Fenestration Rating Council

Earthwise products carry the National Fenestration Rating Council (NFRC) label to assure customers that our products have been independently tested and certified to meet the high standards of energy efficiency that are required for ENERGY STAR certification.

Limited Lifetime Warranty

Earthwise Windows & Doors are backed by our transferable Limited Lifetime Manufacturer’s Warranty, on top of the Good Housekeeping money‐back guarantee.

Made in USA Certified®

Earthwise carries the Made in USA Certified® designation as an independent, third‐party verification that our products are made in the USA by American workers using components sourced in the USA

Energy Star

Earthwise Windows & Doors are designed and built to meet the highest standards of energy efficiency. With high‐performance options, all Earthwise products meet or exceed ENERGY STAR standards.

Potomac Windows & Doors is proud to offer Earthwise brand windows as our primary supplier. Eartwise windows are an exceptional choice for a variety of reasons:

  • Energy Star Manufacturing Partner
  • Good Housekeeping Seal
  • Made in USA certified
  • Limited Lifetime Warranty
  • NFRC member
  • Keystone certified

On top of all these accreditations they are also manufactured in Northern VA and suited for our local climate. If you are comparing energy effecicncy numbers please feel free to email us for additional info.