Our ULTRA windows and doors are ideal for low energy and Passivhaus projects.
Our range offers a Passivhaus certified window option with insulated frame and low U values at a competitive price.
- U value as low as 0.68 W/m2K
- Dual compression seals
- Passivhaus certified window option with insulated frame
- FSC® certified redwood or oak timber
- Alu-clad option for inward-opening windows
- Part Q compliant and Secured by Design options