The premium 83 Series offers superior energy efficiency with thermal break technology. Featuring 83mm frame depth and dual active/tilt-in sashes, these double-hung windows are designed for high-end residential projects requiring both beauty and performance.
| Performance Grade | Zturnbuilder 83 Series Specs |
|---|---|
| Wind Resistance | Class 9 (≥ 5.0 kPa) |
| Water Tightness | Class 6 (≥ 700 Pa) |
| Air Tightness | Class 8 (≤ 0.5 m³/m·h) |
| Acoustic Rating | 45dB+ |
| Thermal K-value | 1.2 – 1.5 W/m²·K |
| Vertical Precision | ± 1mm (5m height) |
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