1These windows have the highest number of internal chambers,
lending them outstanding insulation and sound abatement qualities,
as well as thermal efficiency and increased sturdiness.
2 Interior glazing bead design constitutes a key security feature,
allowing the window to withstand winds of over 330 km/h (205 mph).
3 The full size, double-walled handle bead is exceptionally sturdy.
4 The double walls of the sash give it increased sound abatement
qualities and strength.
5 Multiple weather stripping provides remarkable airtightness,
reducing heating and air conditioning costs.