KV 350

The KV 350 is a uPVC-aluminium window system that comes with Internorm’s modern sun protection technology. Designed with market leading integral blinds, these systems provide an array of unique benefits for a range of commercial projects and applications.

The KV 350 is largely similar to the KV 440 uPVC-aluminium system, as they both come with I-tec shading. However, the KV 350, available as both a window or door, is manufactured with a slightly slimmer profile. It delivers versatile, visually appealing aesthetics.

  • U-value icon
    Thermal insulation (in W/m²K):
    Uw up to 0.79
  • soundproof windows
    Sound reduction (in dB):
    38 – 44 average
  • secure windows
    Secured by Design & PAS 24
  • concealed window locks

Profile Options

KV 450 Windows with Integral Blinds
KV 350 Windows with Integral Blinds
Secured by Design windows
PAS 24 windows

Technical Specifications

Dimension (in mm)

  • Frame construction depth 74
  • View width frame/sash 112
  • View width flying mullion (2 sashes) 130
  • View width transom/mullion (2 sashes) 181
Opening Versions

  • Fixed
  • Tilt
  • Outward opening doors

  • Quantity 3
  • Colour Black
  • Feature bars? Yes

Profile Features

Integrated Sun Protection

The KV 350 is fitted with Internorm’s integral blinds, with a variety of different styles to suit different décors. Our sun protection systems use the minimum amount of energy and require zero maintenance for the end user.

Concealed Hardware

Internal power sources for the blinds, locking systems and other components are all discreetly fitted within the profile. Industry leading hardware is concealed from the naked eye, ensuring our windows are always visually appealing.

Slim & Flush Profile

The KV 350 is designed with a 74mm profile that is 19mm slimmer than the KV 440 variant. All the while, the uPVC-aluminium profile is designed to be fully flush to the frame, perfect for eye-catching commercial application.

Triple Gaskets

These uPVC-aluminium windows and doors are manufactured with Internorm’s triple gaskets. Three continuous weatherseals around the perimeter prevent leaking, damp or mould, while equally protecting the internal components.


The handles we install with the KV 350 are easy to operate and always secure. All the while, the design of the handles ensure the aesthetics of these flush fitting uPVC-aluminium windows is maintained.

Internorm Handles


I-tec glazing is fitted in KV 350 windows and doors as standard. Supported by the uPVC-aluminium frame, this glazing is robust and energy efficient. We have a range of upgrades so that our glazing is always fit for purpose.

Internorm Glazing


Specify the colour of your KV 350 uPVC-aluminium systems from our expansive colour portfolio. Our range of fade proof, weatherproof finishes accommodate the needs of all commercial projects.

Internorm Colour Range