Chartwell Green UPVC Window-design 78

Description

Chartwell Green uPVC Wide Combination Fixed Window with Central Top Vent — Expansive Panoramic Glazing, Symmetrical Ventilation

When a wall opening is wide enough to demand the most expansive glazing this window range can deliver — and the ventilation requirement must be met without compromising a single millimetre of the panoramic lower view — our Chartwell Green uPVC Wide Combination Fixed Window with Central Top Vent provides the answer. Six panes of A-rated double glazing span the full width of the opening in a configuration that places a single central top-hung vent symmetrically within a row of three upper lights, above three full-height fixed lower panes that together create one of the most extensive unobstructed views available in our entire Chartwell Green range.

This is the window for the widest openings, the largest rooms, and the most ambitious glazing intentions — where maximum light, maximum view, and discreet symmetrical ventilation must all coexist in a single, made-to-measure Chartwell Green frame.

The Wide Format and Why It Works

Wide, horizontally oriented windows have a particular relationship with the rooms they serve that narrower configurations cannot replicate. When glazing spans a wide opening at the same height — from the left wall to the right wall of a large room, or across the full width of an extension’s rear elevation — natural light enters the room from the full width simultaneously, without the directional concentration that a narrower opening produces. The room is illuminated evenly from edge to edge. The view outside is presented in its full horizontal extent. And the connection between the interior and the outdoor space feels continuous rather than framed — a quality that transforms how the room is experienced at every time of day and in every season.

This six-light configuration maximises that wide-format quality by combining two complete horizontal zones — an upper row of three lights and a lower row of three lights — across the same wide opening, with each zone serving a distinct purpose within the overall composition.

The Upper Section — Symmetry and Background Ventilation

The three upper lights form a carefully balanced row across the head of the frame. The two outer fixed top lights flank the central top-hung opening vent at equal widths on both sides — creating a perfectly symmetrical upper section in which the central vent is the focal point, acknowledged by its central position and balanced by equal fixed sections on both sides.

This symmetrical arrangement of the single ventilation light within the upper row is the defining design decision of this window. Rather than positioning the vent to one side — which would create an asymmetric upper section and an unbalanced composition across the full width — the central placement gives the window a bilateral balance that works at every viewing distance and from every position within the room. From the far end of a large open-plan space, the window reads as a single wide, symmetrical composition. From close up, the central vent is clearly identifiable as the active element within an otherwise fixed and passive upper row.

The top-hung opening action of the central vent makes it inherently rain-resistant — the outward-tilting sash deflects water away from the ventilation gap at its top edge, allowing the vent to remain open in light rain, overcast conditions, and cool evenings without any concern about water entering the room. Warm stale air rises from the wide room below and exits at ceiling level through the central vent, maintaining a constant, gentle background ventilation that is felt in air quality rather than as a noticeable draught. For a room of this width — where air can stratify and stagnate in the upper zone during cooking, heating, or periods of occupation — this central overhead ventilation is practically significant.

The two flanking fixed top lights contribute natural light to the upper zone — the ceiling and upper walls — across the full width of the frame, ensuring the room is illuminated evenly from edge to edge at ceiling level. In combination with the extensive lower fixed glazing below the horizontal rail, this upper illumination creates a layered, graduated natural light distribution that fills the room from floor to ceiling more evenly and more generously than any narrower window configuration could achieve.

The Lower Section — Three Panes, One Panoramic View

Below the continuous horizontal rail, three full-height fixed panes span the complete internal width of the lower section from the left outer stile to the right outer stile. The two slim vertical dividers between the three lower panes are sized to the minimum structural requirement of the 70mm profile, keeping the visual interruption between panes to an absolute minimum and allowing the lower section to read as close to a single uninterrupted panoramic view as the structural requirements of a three-pane section allow.

At seated eye level — the height from which a garden, terrace, landscape, or outdoor space is most directly experienced — all three lower fixed panes present clear, unobstructed glass across the full width of the opening. There are no handles, no hinge details, no vent indicators, and no horizontal frame elements breaking the lower glazed surface at eye level. The outdoor space is visible in its full horizontal extent, from the left edge to the right edge of the frame, at the height where it matters most.

The three lower fixed panes together create a glazed lower section of exceptional width — the widest lower fixed section available in our Chartwell Green range. For rooms that face a south-facing garden, an open rural aspect, or a wide terrace, this lower section gives the outdoor space the full width of the opening to be seen across. The garden is not divided by a central frame element. The terrace is not separated into left and right halves. The view is presented whole, in its full horizontal extent, at eye level.

Consistent A-Rated Performance Across Six Panes

Delivering consistent A-rated thermal performance across a six-light frame at this width requires a profile system that maintains its specification at every junction, every divider, and every transition between the upper and lower sections. Our 70mm multi-chamber uPVC frame meets this requirement throughout — the sealed air chamber construction providing consistent thermal resistance at the outer border, the horizontal rail, the upper and lower vertical dividers, and all junctions between them.

The 28mm argon-filled sealed units, soft coat low-E glass, and warm-edge black superspacer bar complete the specification across all six panes, delivering a U-value of 1.3 W/m²K consistently from the top-left fixed light to the bottom-right fixed pane. This double glazed uPVC window meets Part L Building Regulations across its full six-pane width and delivers sustained, measurable reductions in heat loss through what is typically the most thermally demanding glazed opening in a large property.

The wide horizontal rail spanning the complete internal width between the upper and lower sections is the thermally most challenging element at this scale — a continuous frame element crossing the full width with surfaces on both sides of the building envelope. Our 70mm multi-chamber profile addresses this with sealed air chamber construction at the rail section, maintaining thermal resistance across the full width and preventing the cold bridge and condensation strip that develop at this junction in single-chamber alternatives.

Six Panes Wide — The Chartwell Green Frame at Its Most Expansive

A six-light window at this width is the most architecturally significant window type in our Chartwell Green range — and the character of the frame at this scale has a direct and substantial impact on how the elevation reads. Our fully sculptured 70mm profile carries the full width of this frame with authority. The moulded edges and shadow lines of the horizontal rail, the vertical dividers, and the outer border give every frame element a three-dimensional quality that accumulates across the full width — more profile detail, more depth, more character the wider the window becomes.

In Chartwell Green, the six-light combination window makes an immediate and lasting impression on any elevation. The symmetrical upper section — fixed light, vent, fixed light — sits above the three lower fixed panes with a balanced precision that reads as considered design at every viewing distance. The soft sage tone of the Chartwell Green frame runs continuously across the horizontal rail, the upper and lower dividers, and the outer border, tying all six lights into a single cohesive composition that looks as though it was designed for this opening specifically.

The Chartwell Green finish is co-extruded into the uPVC profile, guaranteed not to fade, peel, warp or discolour, and backed by a full 10-year profile guarantee. These uPVC casement windows require no painting, no maintenance schedule, and no upkeep beyond an occasional wipe with a damp cloth across the full width of the six-pane frame.

Security Across All Six Panes

The central top-hung vent is secured with a multi-point locking system and a lockable push-button handle as standard, with patented double-action bubble gaskets running the full perimeter to maintain a weathertight and draught-proof seal when closed. All six panes across the complete frame are retained by internal glazing beads, preventing glass removal from the exterior on any section — including all three wide lower fixed panes where the individual glazed areas are at their greatest. The fixed outer frame, horizontal rail, and all vertical dividers form a rigid welded uPVC structure with no hinge gaps or sash contact zones on any fixed section.

Specification at a Glance

• Energy Rating: A-rated | U-value 1.3 W/m²K
• Configuration: 6-light — fixed top light upper left, central top-hung vent, fixed top light upper right, three full-height fixed lower panes
• Frame System: 70mm multi-chamber thermally efficient uPVC
• Glazing: 28mm argon-filled units, soft coat low-E glass, warm-edge superspacer
• Locking: Multi-point locking on central top-hung vent
• Handles: Lockable push-button handle as standard
• Beading: Internal across all six panes for maximum security
• Gaskets: Patented double-action bubble gaskets on central vent
• Finish: Chartwell Green — guaranteed not to discolour, warp or peel
• Compliance: Part L Building Regulations
• Guarantee: 10-year profile guarantee

Made to Your Exact Measurements

• Frame Width: 415mm – 700mm
• Frame Height: 800mm – 2200mm

Every window is manufactured to order to your precise dimensions. Enter your measurements at checkout for a perfect made-to-measure fit across the full width of your opening. Our team is available for sizing queries, configuration advice, and specification details before you place your order.

The Widest View With the Most Discreet Ventilation

At this scale — six lights, three lower panes, the full width of a large wall opening — the priority is clear: give the room the view and the light it deserves, and handle the ventilation as discreetly and symmetrically as the frame allows. This wide combination fixed window does exactly that. Three full-height fixed lower panes present the outdoor space in its full panoramic width without a single vertical division interrupting the view at eye level. A single central top-hung vent handles all the background ventilation the room needs, positioned symmetrically at the midpoint of the upper row so that it never compromises the balance of the composition above or the clarity of the panorama below. And the Chartwell Green frame gives the whole six-light design the architectural presence, heritage finish, and profile quality that make it the most expansive and most distinguished window in our entire Chartwell Green uPVC window range.