F-Series · Fiberglass
GR65 Dual Action Window
The slimmest fiberglass window in the range: a 65 mm dual-action frame drawn as tight as pultruded fiberglass allows, for the maximum glass and daylight in an apartment or dorm elevation.
A tilt-turn window on a narrow 65 mm fiberglass frame. It tilts for secure trickle ventilation and turns fully inward for cleaning and egress, all from one handle, while the slim sightline keeps the elevation quiet and lets in as much light as possible.
Technical specifications
| Frame depth | 65 mm |
| Frame material | Pultruded fiberglass, powder-coated |
| Glazing pocket | Up to 36 mm |
| Opening | Dual action / tilt-turn, inward |
| Whole-window U-value | 0.14 W/m²K Calculated |
| SHGC | 0.20–0.50 by glass Project-specific |
| Air infiltration | Tested to AAMA / NFRC Project-specific |
Certified values are published as NFRC and CSA testing completes. Calculated values come from LBNL THERM and WINDOW models of the specific assembly. Project-specific values depend on size and glass package.
What is a tilt-and-turn (dual action) window?
A tilt-and-turn window, also called a dual-action window, does two jobs from a single handle. Turn the handle one way and the whole sash swings inward like a door for full ventilation, easy cleaning from inside, and a clear egress opening. Turn it the other way and the sash tilts inward at the top only, for secure background ventilation with the opening out of easy reach. All of the operating hardware is concealed inside the frame. It is the standard operable window across Europe, and it is the right choice wherever a window has to both ventilate securely and open wide.
