When it comes to superior climate control, noise reduction and strength,
two panels of glass are better than one
Two Panels of Glass are Better than One
A high performance glazing option to suit different climatic conditions. Ranging from Duo Ultra™ Clear which offers moderate SHGC performance combined with high levels of natural light transmission to Neutral 50 super low SHGC, ideal for hot climates or where larger expanses of glazing need summer heat protection.
Duo Ultra™ units have as standard, new generation Low-E glass technology for improved performance over standard single glass and IGU’s. All Duo Ultra™ units are supplied as standard, with Grade ‘A’ standard safety glass.
The Duo Ultra range is available in three options;
L0 – ENERGY – SAFETY
Basic level high performance glazing with toughened safety glass as standard.
L1 – ENERGY – SAFETY – UV BLOCKING
Upgrade performance with addition of a laminated safety glass panel for added UV protection.
L2 – ENERGY – SAFETY – UV BLOCKING – NOISE REDUCTION
Upgrade performance with addition of an Acousta™ noise reduction laminated safety glass panel.
Glazing Type
- Insulated Glass
- Insulated Glass with laminated glass & Acousta™ laminated glass
Performance 
| IGU | U-value | SHGC | VLT% |
| DUO ULTRA™ L0 | |||
| Single Glass comparison 4mm clear | 5.9 | 0.84 | 89 |
| Clear 78
6mm / 12mm Argon / 6mm (#3) |
1.4 | 0.53 | 78 |
| Grey 39
6mm / 12mm Argon / 6mm (#3) |
1.4 | 0.34 | 39 |
| Neutral 50
6mm (#2)/ 12mm Argon / 6mm |
1.3 | 0.25 | 50 |
| DUO ULTRA™ L1 | |||
| Clear 78
6mm (#2) / 12mm Argon / 6.38mm |
1.4 | 0.53 | 78 |
| Neutral 50
6mm (#2)/ 12mm Argon / 6.38mm |
1.3 | 0.25 | 50 |
| White Trans
6.38mm / 12mm Argon / 6mm (#3) |
1.4 | 0.43 | 60 |
| DUO ULTRA™ L2 | |||
| Clear 78
6mm (#2) / 12mm Argon / Acousta 6 |
1.4 | 0.52 | 77 |
| Neutral 50
6mm (#2)/ 12mm Argon / Acousta 6 |
1.3 | 0.25 | 50 |