Without modifying its traditional architectural aesthetic or ease of operation, Kolbe’s Ultra Series Sterling double hung windows have attained High Velocity Hurricane Zone (HVHZ) certification in the state of Florida.

Kolbe’s Ultra Series Sterling double hungs not only meet criteria for the HVHZ certification, but also meet the criteria for large missile impact Level D, and Wind Zone 4 testing standards (IPD4). The IPD4 rating indicates these products are an excellent choice for hurricane areas, as well for any region of the country that is subject to severe storms or gale-force winds.

Sterling double hung windows feature impact resistance for protection in severe weather and are constructed without unsightly brackets, visible rods or extra locks. All products come standard with concealed jambliners and energy efficient LoE coating. Insulating units with the LoE coating further reduce solar heat gain and improve energy efficiency.

Assisting with other environmental goals, Kolbe presents a range of sustainably-harvested wood species for the interior trim, such as those certified by the Forest Stewardship Council (FSC). For low maintenance exteriors, Ultra Series Sterling double hung aluminum clad windows include a 30-year limited exterior finish warranty.

Accommodating fresh air and natural ventilation without inviting pests, GreenGuard® Certified BetterVue® mesh is standard on screens for Kolbe’s Sterling double hung windows. The innovative lock on Sterling double hung window has a dual-positioning lever. Easy-to-use, it allows the sash to be unlocked and tilted in for cleaning, while boosting the unit’s performance.

Learn more about Kolbe’s Ultra Series Sterling double hung windows and impact resistant products at www.kolbe-kolbe.com.

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