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KF 410 is an especially sought-after model due to its energy efficiency and technologically-advanced features. This model is suitable for Passive House and Net Zero homes, due to the superior frame insulation. Benefit from maximum comfort throughout your home all year round.

The frame is insulated with granulate I-tec Insulation, significantly improving the performance of the window. The I-tec built-in ventilation system is an optional feature that improves the quality of air in your home and ensures stable room temperatures. I-tec Glazing provides excellent stability due to the all-round bonding of the glass pane.

Read more about Internorm I-tec Innovations.


Thermal Efficiency
UW as low as 0.62 W/m²K
Triple Glazed
Sound Reduction
Up to 45 dB
Resistance classes RC1N, RC2 | Concealed locking
Construction Depth
uPVC: 90 mm | uPVC - Aluminum: 93 mm


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