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 |
| 4mm Clear / 12mm Argon / 4mm Clear (#3) | 1.37 | 0.56 | 80 |
| 4mm Grey / 12mm Argon / 4mm Clear (#3) | 1.37 | 0.41 | 50 |
| 6mm Neutral 50 / 12mm Argon / 6mm Clear (#2) | 1.32 | 0.25 | 50 |
| DUO ULTRA™ L1 | |||
| 6.38mm Clear / 12mm Argon / 4mm Clear (#3) | 1.36 | 0.53 | 79 |
| 6.38mm Grey / 12mm Argon / 4mm Clear (#3) | 1.35 | 0.36 | 39 |
| 6.38mm Neutral 50 / 12mm Argon / 6mm Clear (#2) | 1.32 | 0.25 | 50 |
| 6.38mm White Trans / 12mm Argon / 4mm Clear (#3) | 1.37 | 0.44 | 61 |
| 6.76mm Grey Trans / 12mm Argon / 4mm Clear (#3) | 1.37 | 0.29 | 29 |
| DUO ULTRA™ L2 | |||
| 6.76mm Clear / 12mm Argon / 4mm Clear (#3) | 1.35 | 0.52 | 79 |
| 7.14mm Grey / 12mm Argon / 4mm Clear (#3) | 1.36 | 0.34 | 38 |
| 6.76mm Neutral 50 / 12mm Argon / 6mm Clear (#2) | 1.32 | 0.25 | 50 |