- All-uPVC multi-chamber design and multiple weather-stripping deliver
amazing energy performance.
- Double co-extruded outside sash for superior water tightness.
- Interior glazing bead: key design component for withstanding 220 mph
(350 km/h) winds.
- The most internal chambers: outstanding insulation, noise reduction,
thermal efficiency, and strength. Ranked Number 1 out of 22,000 windows
tested by the (US) NFRC for energy performance.
- Full-size, double-walled handle bead: remarkably sturdy, built for
years of tough use.
- Mounting hardware installs through at least 2 uPVC walls for secure,
time-tested placement.
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