All OKNOPLAST windows feature Tilt and Turn operation with multi-point locking that engages 3-5 compression points simultaneously around the sash perimeter:
Locked — Full perimeter compression against EPDM gasket for maximum airtightness Tilt — Opens from the top (4-6 inches) for ventilation while maintaining security Turn — Swings fully inward for easy cleaning and emergency egress
This achieves air infiltration below 0.10 CFM/ft2 at 25 Pa — compared to 0.30-0.50 CFM/ft2 for most double-hung replacements.
Image coming soon
Certifications and Guarantees
NFRC certified (U-Factor, SHGC)
PHIUS Passive House recommended (PAVA triple-pane, Climate Zones 3-8)
Florida Product Approval / HVHZ Zone 4 (PAVA Impact)
IFT Quality Mark (ID 190-6038531-8)
CEKAL certified insulating glass units
EN 12608 Class A uPVC compound
ISO 14001 environmental management
10-year product guarantee
Lead time: 8-10 weeks from confirmed order to U.S. delivery. 4-5 weeks production at the facility in Poland and 4-5 weeks ocean freight and customs clearance.
