HX 300 Frameless Fixed Glazing
The HX 300 is Internorm’s timber/aluminum fixed glazing for floor-to-ceiling glass. Its frame is built into the wall, so only glass shows inside and a 58 mm edge outside, with single panes up to 10.5 m² and a Uw as low as 0.74 W/m²K.
How the HX 300 is built
The HX 300 frame is not a single profile. It is built from several layers glued together, a construction that lets Internorm incorporate the window system and the insulating glass into one element. That layered build is what makes single glass areas of up to 10.5 m² possible while keeping the unit relatively light for its size.
The glass is bonded continuously to the sash, part of Internorm’s I-tec approach, which increases stability, improves burglary protection and supports thermal and acoustic performance. Outside, aluminum cladding protects the internal components from the weather.
The visible result is minimal: 58 mm of frame on the outside and, from the interior, nothing but glass. Construction depth is 100 mm. For the design questions, such as where fixed glass belongs and what should open beside it, see our frameless glazing overview.
HX 300 technical data
Values as published by Internorm for the HX 300.
| System | Internorm HX 300 timber/aluminum fixed glazing |
|---|---|
| Thermal insulation | Uw as low as 0.74 W/m²K |
| Sound reduction | 34–47 dB |
| Visible frame | 58 mm, outside only; glass only from inside |
| Construction depth | 100 mm |
| Maximum single glass area | Up to 10.5 m² |
| Glazing | Triple glazing, bonded continuously to the sash |
| Frame build | Several layers glued together; aluminum-clad exterior |
| Sealing | Triple gaskets |
| Operation | Fixed, non-opening |
| Exterior colours | Aluminum in standard, Hirest, HDS and stainless-steel colours |
| Combines with | Internorm timber/aluminum windows and lift & slide doors |
Best-case published values. Final performance depends on pane size and glass build-up and is confirmed in your quote.
Built into the wall, not set into a hole
The rendering shows the principle. The HX 300 frame sits within the wall construction and can be completely embedded in brickwork or render, so the exterior shows only a slim edge and the interior finish closes up to the glass. Internorm calls it the optimal construction connection for floor-to-ceiling glass surfaces.
That connection is where performance is won or lost. The joint between frame and wall must be airtight and continuously insulated, or even excellent glass will lose heat at its edges. Internorm stresses reliable installation by certified installers, and InterHaus supports architects and builders with the detail and supervises the work on site.
- Frame set within the wall build-up, rendered or bricked in on the outside
- Glass-only view from the interior, with no visible corners or profiles
- Designed for floor-to-ceiling glass surfaces
- Airtight building connection detailed before manufacture
HX 300 key features
Insulated design
Triple glazing and an insulated frame keep a large pane comfortable through winter while the full glass area brings in daylight.
Soundproof design
Triple gasket sealing and triple glazing deliver 34–47 dB of sound reduction, a real difference on an urban street.
Robust composition
Continuous bonding of glass to sash increases stability and burglary protection.
Near-invisible glass joints
Joints between neighbouring panes are nearly invisible, which is what makes very large glazed areas possible.
Customizable
Sizes, glass and exterior colour are specified to the project, and HX 300 unifies with Internorm’s other timber/aluminum products.
Low maintenance
Aluminum-clad profiles shield the internal components; the glass needs only an occasional wipe.
A large pane that stays comfortable in January
Big glass raises a fair question in an Ontario winter: will the room be cold? The HX 300 answers with a Uw as low as 0.74 W/m²K for the element, triple glazing and triple gaskets, and a wall-integrated frame that improves thermal efficiency and prevents drafts.
A well-insulated pane keeps its inside surface closer to room temperature, which reduces the cold downdraft people feel beside large, poorly insulated glass. That keeps the zone right beside a floor-to-ceiling HX 300 wall comfortable enough to sit in.
For acoustics, HX 300 reaches 34–47 dB depending on glazing, a higher top figure than either Internorm lift & slide door. Homes near highways, flight paths or busy city streets can have a full glass wall without bringing the noise inside.
Specifying the glass in a large fixed pane
On a pane this size the glass build-up decides most of the performance. Internorm makes most of the insulating and toughened safety glass in its products in-house, and its thermal insulation glazing uses wafer-thin coatings and noble gases such as argon or krypton between the panes. The HX 300 is triple-glazed.
Safety glass is the second decision. Toughened ESG glass fractures into small, blunt fragments under enough force, while laminated VSG glass shatters but stays attached to a tear-resistant interlayer. Which build-ups suit your pane depends on its size, position and exposure, so we confirm the options with Internorm for each project.
If noise is a concern, tell us about the source. The 34–47 dB range depends on the glazing selected, so the glass is specified against the noise you actually have, whether that is a highway, a rail line or a downtown street.
Where HX 300 fits
Common ways to use HX 300, alone or with Internorm doors and windows.
Floor-to-ceiling glass walls
A living room or stair hall wall in large single panes, linked by glass joints that are almost invisible.
Beside an HS 330 door
Fixed HX 300 panels extend a timber/aluminum lift & slide door into a full glass wall with matching aluminum outside. See the HS 330.
With HF 410 windows
Internorm suggests combining HF 410 timber/aluminum windows with HX 300, so tilt & turn windows and fixed panoramas share one facade.
HX 300 beside Internorm’s lift & slide doors
HX 300 is often specified next to one of these doors. The data side by side.
| HX 300 | HS 330 | KS 430 | |
|---|---|---|---|
| Type | Fixed glazing | Lift & slide door | Lift & slide door |
| Material | Timber/aluminum | Timber/aluminum | uPVC or uPVC/aluminum |
| Uw, as low as (W/m²K) | 0.74 | 0.73 | 0.64 |
| Sound reduction (dB) | 34–47 | 32–40 | 33–43 |
| Construction depth | 100 mm | 209 mm | 200 / 203 mm |
| Visible frame | 58 mm, outside only | 103 mm profile width | 80 / 82 mm profile width |
| Largest glass | Single panes up to 10.5 m² | Glass up to 3.2 m tall | Elements up to 6500 × 2800 mm |
| Security, up to | – | RC 2 | RC 2 |
Best-case published values from Internorm data.
“This was a VIP experience from start to finish. Fast, friendly and effective service. It really helped that Vik is an architect, she was able to guide us through the entire process and coordinated directly with our designer. The windows are top-notch, but the service was better than the product.”
HX 300 questions
Up to 10.5 m² in a single piece of glass. For longer runs, several panes are linked by Internorm’s nearly invisible glass joints.
The frame has a construction depth of 100 mm and is designed to be fully built into brickwork or render. The exact connection depends on your wall assembly, so we work it out with your architect or builder from the drawings before ordering.
It is a natural candidate. Its best-case Uw of 0.74 W/m²K with triple glazing suits high-performance envelopes, and InterHaus lists Passive House and Net Zero homes among the ideal applications for frameless glazing. Whole-building results depend on design and installation; our Passive House page explains how we approach these projects.
The aluminum exterior comes in Internorm’s standard colours (highly weather-resistant, M916 facade quality), Hirest HM, HF and HFM powder coatings, intense HDS colours and the EL01 and EL02 stainless-steel colours. Inside, the frame is hidden, so your wall finish frames the glass.
HX 300 is a timber/aluminum system and Internorm presents it with its other timber/aluminum products. Since Internorm designs its timber/aluminum and uPVC/aluminum cladding to match, a uniform exterior with uPVC/aluminum windows is also possible.
Elevations or opening sizes, the wall construction, the exterior colour and any doors or windows that will sit beside the glazing. With drawings we can advise on pane sizes, joints and the construction connection.
Related pages
Frameless glazing overview
Daylight, wall integration and combinations explained.
ExploreHS 330 Timber/Aluminum
A timber lift & slide door to pair with HX 300.
ExploreHF 410 timber/aluminum window
Tilt & turn windows Internorm combines with HX 300.
Explore
KS 430 uPVC/Aluminum
A clad uPVC lift & slide door for the same elevation.
ExploreData sheets & brochures
Dimensions, profile sections, glazing build-ups and performance values — ready for your architect or builder.
Specify HX 300 for your project
Send elevations, the wall construction and the doors and windows planned around the glazing. We will advise on pane sizes and the construction connection, then prepare a detailed quote.