The hand-soldered grids may be diamond, rectangle, or a custom pattern of your choosing.


Custom Designs Welcome!

Contact us to discuss your ideas for your own “Heritage Thermal Windows.”  We’re happy to work with you to create the perfect one-of-a-kind window for your home or business.


These thermal units may be installed in newer vinyl, wood, or fiberglass sashes.

They may also be used to replace existing clear thermal units and installed in the existing sash as long as the dimensions are the same. ( Width x Height x Thickness)


These thermal units are available in thicknesses measuring from 1/2″ to 1″ for flat came and 5/8″ to 1″ for round.

There is clear glass on the front and back, with the decorative metal grid inside the unit.

The dual-seal on the thermal unit is a polyisobutylene primary and pure silicon secondary. This is acknowledged as the superior sealing system in the industry for insulated glass units (I.G.U.s)

You don’t ever want to deal with a seal failure, and neither do we. Our track record is superb.


Heritage Thermal Windows are based and built in the U.S.A.

This window unit is warranted against defects in materials and workmanship for a period of 20 years, as long as it is used for its intended purpose. Damage arising from shipping, mishandling, installation, or accidental or intentional impacts are expressly excluded, and all other express or implied warranties, including but not limited to those of merchant-ability or fitness for any other purpose, are disclaimed. The remedy for any breach of warranty will be limited to replacement of the unit.


– God Bless America –