Nothing feels better in winter weather than inviting in the sun’s warming rays through big, bright windows. Incorporating a passive solar heat concept, ClimaGuard nrG provides powerful insulation against harsh winters as it selectively invites warm sunshine into the home as a free and sustainable heat source.
ClimaGuard nrG offers the ideal balance between low U-value, high transparency, color neutrality and solar heat gain.
ClimaGuard nrG is a powerful insulating glass. As part of a double- or triple-glazed window unit, it minimizes heat loss to maintain desirable inside temperatures—so homeowners consume less energy and save more money. The level of insulation made possible by ClimaGuard nrG minimizes cold downdraughts, maintain comfort even when close to the window. It also helps prevent condensation on the inner pane.
When outside temperatures drop, ClimaGuard nrG helps keep homes warm and snug inside. At the same time, it warms the home naturally by letting in available solar heat. ClimaGuard nrG is part of triple-glazed window units certified as passive house components by Dr. Wolfgang Feist of the Passivhaus Institute, Germany.
In colder regions, every ray of natural light is worth savoring. Many low-E windows save energy at the expense of clarity—but not ours. Supremely clear and color neutral, ClimaGuard nrG can be used with Guardian ExtraClear™ float glass to create super insulating triple-glazed units with light transmission comparable to ordinary double-glazed windows—and without the expense of specialized low-iron glass.
| Insulating glass configurations | Coating on surface | Light Transmission (%) |
Light Reflection (%) |
Color Rendering Index Ra |
Solar Factor (g) EN 410 (%) |
U-value EN 673 (15k) W/(m2K) |
|---|---|---|---|---|---|---|
| 4 – 12 – 4 – 12 – 4 (Argon filled) |
2 and 5 | 73 | 16 | 96 | 62 | 0.8 |
| 4 – 14 – 4 – 14 – 4 (Argon filled) |
2 and 5 | 73 | 16 | 96 | 62 | 0.7 |
| 4 – 12 – 4 – 12 – 4 (Krypton filled) |
2 and 5 | 73 | 16 | 96 | 62 | 0.6 |
| 4 – 16 – 4** (Argon filled) |
3 | 81 | 13 | 98 | 74 | 1.3 |
Gas filling rate: 90%
**In a double-glazed insulating glass unit the product offers outstanding values regarding transparency and colour neutrality.


