Harvey provides a variety of replacement and new construction window glass options to meet or exceed ENERGY STAR requirements. Depending on your climate zone, you can choose the package that fits your specific project needs.

ThermaLock 3X
ThermaLock 3X Glass Option Visual Representation

Our most outstanding thermal performance package. It kicks performance up a notch by using Krypton gas, an even better insulator, between three Low-E coated panes of glass. Used by LEED and green building professionals, this option is the best choice to significantly reduce energy consumption in climates where both cooling and heating costs are a concern.

Surpasses E-Star requirements in all US Zones.

ThermaLock Glass Option Visual Representation

A specialized UV-filtering Low-E glass coating reflects heat back into your home while Argon gas insulates air between the panes, keeping your home’s inside temperature consistent, and preventing the effects of outside temperatures, yet still allowing sunshine in.

Surpasses E-Star requirements in North and North Central Zones.

ThermaGuard Glass Option Visual Representation

Industry-leading Low-E coating combines with Argon gas for effective insulating properties, keeping the inside of a home comfortable and assisting with energy efficiency.

Meets E-Star requirements in the North Central Zone.

SunGain Glass Option Visual Representation

SunGain utilizes High Solar Heat Gain Coefficient, meaning more of the sun’s rays penetrate the glass, offsetting heating costs in colder climates. SunGain also has our highest Visible Transmittance (VT) rating which means it allows more natural sunlight in.

Meets E-Star Qualifications in the North Zone.


Our contractor referral program, HBP ProZone®, connects homeowners like you with professional contractors in your area.


Working With a Contractor

Proper installation is vital to getting the most from quality building products, so selecting the right contractor for your project is an important part of the process.