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Internorm windows for passive houses
17+ years experience

Internorm windows

Kulttur offers a varied range of windows that integrate perfectly into the design of your home. The superior quality of Internorm products is attested by the materials used to make the windows.

Whatever product you choose — PVC windows, PVC clad with aluminium or timber clad with aluminium — you have the certainty that your choice is the best one.

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17+
Years experience
Internorm
Official partner
Tripan
NZEB standard
Austria
100% production
Uw up to 0.62 W/m²Kdepending on model and configuration
100% made in Austriathree Internorm factories
I-tec technologiesinsulation, glazing, security, shading
Internorm distribution partnerKulttur, Bucharest
Warranties up to 10 yearson certain components and properties

Our collection

Available Internorm window types

Choose the type suited to your project. Click a category for details and systems.

PVC-aluminium windows

Internorm · Austria

PVC-aluminium windows

The comfort of PVC, with protection and an architectural look outside. The most common build in premium projects.

Wood-aluminium windows

Internorm · Austria

Wood-aluminium windows

The natural feel of timber inside, stability and protection outside.

PVC windows

Internorm · Austria

PVC windows

An efficient choice for residential projects that need good performance and easy upkeep. Suitable for triple-glazed configurations too.

Lift-slide terrace doors

Internorm · Austria

Lift-slide terrace doors

For large openings and plenty of light. Rigidity, glazing and installation are what matter.

Shading systems

Internorm · Austria

Shading systems

Controlling overheating is part of the house's performance, not an extra.

Aluminium exterior shutters

Internorm · Austria

Aluminium exterior shutters

Surface-mounted exterior shutters

Internorm · Austria

Surface-mounted exterior shutters

Built-in shutters

Internorm · Austria

Built-in shutters

Aluminium exterior shutters

Internorm · Austria

Aluminium exterior shutters

Shading and privacy, with manual or electric operation.

Insect protection screens

Internorm · Austria

Insect protection screens

A small detail that changes daily life, especially with natural ventilation.

Browse products

Internorm window models

PVC, PVC-Aluminium, Timber-Aluminium and Lift & Slide — premium Internorm systems made to order for any project type, with triple glazing and detailed sealing solutions.

Fereastră PVC KF310 Ambiente

Fereastră PVC KF310 Ambiente

PVC

Fereastră PVC KF320 Studio

Fereastră PVC KF320 Studio

PVC

PVC-Aluminium Window KV350 Ambiente

PVC-Aluminium Window KV350 Ambiente

PVC-Aluminiu

Fereastră PVC-ALUMINIU KF310 Ambiente

Fereastră PVC-ALUMINIU KF310 Ambiente

PVC-Aluminiu

Fereastră LEMN-ALUMINIU HF410 Ambiente

Fereastră LEMN-ALUMINIU HF410 Ambiente

Lemn-Aluminiu

Fereastră LEMN-ALUMINIU HF410 Home Pure

Fereastră LEMN-ALUMINIU HF410 Home Pure

Lemn-Aluminiu

HS 330 LEMN/ALUMINIU

HS 330 LEMN/ALUMINIU

Lift & Slide

KS 430 PVC/ALUMINIU

KS 430 PVC/ALUMINIU

Lift & Slide

Fereastră LEMN-ALUMINIU HF520 Studio

Fereastră LEMN-ALUMINIU HF520 Studio

Lemn-Aluminiu

Fereastră LEMN-ALUMINIU HV450 Ambiente

Fereastră LEMN-ALUMINIU HV450 Ambiente

Lemn-Aluminiu

KF 520, more glass, less visible profile

KF 520 combines technical performance with very clean architecture. The sash is visually concealed from the outside, so an opening window looks almost like fixed glazing. The slim frame leaves more surface for glass and daylight, while I-tec Secure integrates the locking mechanism into the sash and allows configurations with burglary protection up to RC3.

  • Uw up to 0.63 W/m²K
  • I-tec Glazing + I-tec Secure
  • Sound insulation up to 46 dB · security up to RC3
  • Construction depth 90/93 mm · PVC or uPVC-aluminium · Studio style

Internorm panoramic glazing and lift & slide systems

Lift and slide doors are the solution for a panoramic wall that needs easy access to the terrace.

KS 430 Lift & Slide

  • Uw up to 0.64 W/m²K
  • Sound insulation up to 43 dB · security up to RC2
  • Lift & slide system PVC / uPVC-aluminium
  • Thermally insulated threshold · Comfort Drive available as an option

HS 330 Lift & Slide

  • Uw up to 0.73 W/m²K
  • Sound insulation up to 40 dB · security up to RC2
  • Lift & slide system timber-aluminium
  • Large glazed surfaces · Comfort Drive available as an option

HX 300 vitraj fix panoramic

  • Uw up to 0.74 W/m²K
  • Sound insulation up to 47 dB
  • Fixed glazing for panoramic surfaces
  • Can be combined with Internorm timber-aluminium systems
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Why Internorm windows

Europe's no. 1 window brand

Over 95 years of development and more than 30 million windows and doors produced.

A vertically developed system

Internorm controls key production stages in-house, from research and profile extrusion to glass production and window manufacturing. It shows in the consistency from one element to the next, especially on projects with many windows.

In-house I-tec technologies

Profile insulation, perimeter glass bonding, integrated locking and photovoltaic-powered shading are solutions developed by Internorm, not bought-in components.

Architecture without compromise

Profiles with reduced visible surfaces, XL glazing, panoramic solutions and four design directions. Performance does not limit the project.

Long-term warranty and service

Warranties of up to 10 years on certain components and properties, plus guaranteed service availability for up to 30 years, under the manufacturer's terms.

Configuration through Kulttur

Internorm distribution partner in Romania. Consultancy, measurements, configuration and installation, from the showroom on Bd. Dacia.

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The I-tec technologies of Internorm windows

Internorm develops its own technologies for thermal performance, security, design and automation. The I-tec range brings together solutions that shape both how the window is built and how it fits into the architecture and smart home systems of the house.

I-tec Glazing

The glazing is bonded continuously to the sash around the whole perimeter. This increases the stability of the assembly and contributes to thermal and acoustic insulation, as well as burglary protection.

I-tec Insulation

Certain profile chambers are filled evenly with insulating granulate to improve frame insulation. This is why two windows with the same glass can reach different Uw values.

I-tec Secure

Instead of conventional locking elements, I-tec Secure uses integrated flaps that fix the sash into the frame on all sides. The system is standard on KF 510 and KF 520, and matching configurations can reach security class RC3.

I-tec Shading

Solar protection is integrated between the glass panes and can run autonomously using a photovoltaic module and a battery. Depending on the system, shading can be controlled automatically to manage daylight and limit overheating.

I-tec Decor

I-tec Decor uses multi-layer digital printing to customise the inner surface of uPVC profiles. It includes 13 decors, with timber or concrete appearance, protected by an extra layer against UV radiation and common cleaning products.

I-tec Connect

I-tec Connect allows compatible Internorm window functions to be integrated into smart home systems. Depending on the equipment, I-tec Shading solar protection, window opening status, skylights and electric drives such as Comfort Drive can be controlled or monitored.

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Design styles of Internorm windows

To help you find the new windows and doors that match your own architecture, we have grouped the elements into four different design styles.

Windows in Studio style

A purist architectural style, with clear forms and minimalist design, typical of a life reduced to the essentials.

Windows in Home pure style

Bright rooms bathed in light create a sense of spaciousness. Simple forms and modern design bring the architecture forward.

Windows in Homesoft style

This architectural style radiates harmony and comfort. The idea of home here inspires warmth and ease.

Windows in Ambiente style

Art Nouveau, traditional and classic houses and elegant manors describe this architectural style. A composition of timeless classic and elegance.

Who Internorm premium windows are for

Internorm windows usually go into projects where the decision is taken early, together with the building envelope, not at the end.

Owners building or renovating to a high standard

You have a project where what you spend over twenty years matters, not only what you pay now. You want to understand the difference between systems before ordering, not after installation.

Projects with an architect or designer

Reduced visible surfaces, XL glazing, glass-to-glass corners and fixed elements enter the drawing at design stage. Systems are configured to real dimensions, and the four design directions can be combined in the same house.

Developers and volume projects

A single supplier for windows, lift-and-slide doors, shading and insect protection. Internorm's integrated production means consistency from one element to the next, which matters when you have fifty openings, not five.

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What you get through Kulttur

  • Consultancy before the quote. We look at the project, orientation, glazed surfaces and performance requirements. The right choice is made from the start, not after ordering.
  • On-site measurements. Windows are configured to real dimensions, not to standard grids.
  • Full configuration. Profile, glass package, hardware, shading, colours. Compare the options in the showroom.
  • Specialist measuring and installation. We agree the installation plan before the order is placed. We keep the site clean while work is under way.
  • Warranties. Up to 10 years on certain components and properties, including weather resistance of the aluminium cladding. Service available for up to 30 years, under the manufacturer's terms.
  • Delivery in 6-10 weeks. Showroom at Bd. Dacia 153-155, Bucharest. 17 years in business.
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Windows for energy-efficient projects

Certain Internorm systems reach Uw = 0.62 W/m²K, depending on the model and configuration. The figure refers to the complete window assembly, not only to the glass package.

Choosing the system for a passive house is only half the answer. The other half is where the window sits relative to the insulation layer and how the installation joint is sealed — and both are decided at design stage.

Window systems

How to choose between PVC, PVC-aluminium and wood-aluminium

Windows for homes that breathe

Windows for homes that breathe

Passive houses, NZEB, uncompromising thermal insulation

A window is part of a system — envelope, ventilation, insulation. Kulttur works with Internorm (Austria), a vertically integrated manufacturer: profile, glass, hardware — all to the same standard. For passive, NZEB or residential projects where real thermal behaviour matters.

Manufacturer
Internorm · Austria
Performance
passive, NZEB houses
Integration
profile + glass + hardware

Free consultation

Window project? Talk to a Kulttur specialist

We review the plans, discuss technical details (triple glazing, RC2/RC3, acoustics, sealing) and propose the right Internorm window configuration for your home or project.

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Showroom Kulttur
PVC, aluminium, wood-aluminium or lift-slide

PVC, aluminium, wood-aluminium or lift-slide

The right typology for each facade

The choice isn't only aesthetic — it depends on opening, exposure, opening size and overall budget. PVC and PVC-Aluminium for efficiency. Wood-Aluminium for warm interiors with modern facades. Lift-slide systems for wide openings to terrace or garden.

PVC / PVC-Alu
efficiency, price-performance balance
Wood-Aluminium
warm interior, robust exterior
Lift-slide
wide terrace openings

Explore Kulttur Internorm windows

All window types, shading systems and complementary solutions for the facade:

PVC windows

PVC-aluminium windows

Wood-aluminium windows

Lift-and-slide doors

Solar protection systems

Exterior shutters

Surface-mounted shutters

Top-mounted shutters

Shutters

Insect protection (screens)

Window sill installation, interior and exterior

Window sill installation, interior and exterior

FAQ

Frequently asked questions about made-to-order windows

Triple, in almost any new project. Three panes with Low-E coatings and inert gas cut heat loss and add sound insulation, and the Internorm systems that reach 0.62 W/m²K use triple glazing. The difference between double and triple glazing comes down to thermal insulation, acoustics and cost.

Uw is the heat transfer coefficient of the whole window: glass, frame, sash and spacer. It refers to the exact configuration, not to the model in general.

Yes. Internorm windows are made to order, to real dimensions measured on site.

Most Internorm windows are suited to premium sound insulation in an urban setting. KF 510 reaches up to 48 dB, depending on the configuration.

Windows are available up to RC2, while KF 510 and KF 520 can reach RC3 in the matching configurations. I-tec Secure is standard on these two systems.

Good positioning in the building envelope, sealing and thermal bridge control. A good product installed carelessly loses part of its advantage.

It depends on dimensions, profile type, glass package, hardware, shading and installation. Quoted per project.

Yes. What matters is the complete system: correct configuration, right glass, sealing and passive house window installation done to detail.

Yes. Consulting helps you choose correctly from the start.