The Most Energy Efficient Windows and Doors Available in the Market

Henselstone introduced a Passive House approved, triple insulated glass window in 2001! Since then, we have consistently been at the leading edge of designing, testing, and installing energy efficient windows and doors. In 2011 Henselstone sponsored the Solar Decathlon entry of Hampton and Old Dominion Universities.

Well designed and properly installed tilt-turn windows can provide you with energy savings of over 30% per year. We offer double and triple insulated glass with Argon gas and with a low E coating. Our standard window has a U-value of 0.28 Btu/hr*sqft*F. That corresponds to an R value of 3.6 (1/U). Our passive house windows have a standard rating of U-value of 0.14 or R 7. Our Argon gas filled, passive house glazing is rated Ug 0.09 or R 11. Currently the only US-based company, Henselstone provides the newest 90mm profiles with triple insulated passive house glazing in hardwood, metal-clad wood, and PVC. Henselstone sashes accommodate up to 2 inches of glazing panel thickness. This allows the use of security glass, noise pollution rated glass, and large picture glass in passive house applications.