Chartwell Green UPVC Window-design 75

Description

Chartwell Green uPVC Right-Hand Casement Window with Twin Top Lights — Mirror Proportions, Considered Ventilation

The relationship between a window and the room it serves is determined not just by how much glass it contains but by where each element of the frame is positioned and what role it plays. Our Chartwell Green uPVC Right-Hand Casement Window with Twin Top Lights is the mirror configuration of our left-hand equivalent — twin fixed top lights spanning the full upper width above a fixed lower left pane and a right-hand side-hung casement below — and it brings the same classic divided-light proportions and A-rated performance to openings where the ventilation naturally belongs on the right.

The choice between left-hand and right-hand casement in this configuration is entirely a room-led decision. When the prevailing view is on the left side of the opening and the right side is the natural ventilation position — given the room layout, the furniture arrangement, or the direction of the prevailing wind — this right-hand configuration is the answer the opening is asking for.

Twin Top Lights — Proportional Anchor Across the Full Width

The twin fixed top lights in the upper section of this window perform the same dual function they do in every divided-light casement configuration — they bring natural light into the ceiling zone of the room, and they establish the proportional framework within which the lower active and passive sections operate.

By spanning the full width of the frame from left outer stile to right outer stile at the same height and depth on both sides, the twin top lights create a unified upper band of glazing that ties the lower left fixed pane and the lower right casement together at the head. Without this upper band, the asymmetry of the lower section — a fixed pane on the left, an opening casement on the right — would read as a simple two-light window with different pane types. With it, the four-light composition gains a visual anchor at the top that resolves the asymmetry below into a balanced, considered whole.

The horizontal rail below the twin top lights runs continuously from edge to edge across the full internal width of the frame. This is the key design element — a single unbroken horizontal line at the same height on both sides, giving the window its strongest architectural feature and its clearest connection to the tradition of divided-light British domestic window design. In the fully sculptured 70mm Chartwell Green profile, this rail is given the moulded shadow detail that makes it read as a deliberate design choice rather than a structural requirement — a positive element that contributes to the character of the window rather than simply dividing it.

The twin top lights themselves sit above this rail as a pair of evenly proportioned fixed panes, their width determined by the central mullion that runs the full height of the frame. In Chartwell Green, the slim dividers between the top lights and the outer frame elements give the upper section a quiet refinement — ordered, balanced, and consistent with the heritage character of the finish that runs throughout the frame.

Within the room, the twin top lights deliver natural light to the ceiling and upper walls across the full width of the opening simultaneously — a breadth of upper illumination that gives the room a sense of height and generosity that a window without an upper section cannot achieve. The ceiling is lit evenly from left to right, the upper walls receive consistent natural light regardless of the time of day or the sun’s angle, and the transition from the upper light zone to the lower view and ventilation zone is marked cleanly and architecturally by the continuous horizontal rail.

Lower Left Fixed Pane — The View Preserved

The full-height fixed pane in the lower left section is devoted entirely to the view and to natural light at eye level — and it fulfils both roles without any hardware interrupting the glazed area or any mechanical element creating visual complexity in the lower left section of the frame.

From a seated position in the room, the lower left fixed pane presents the left side of the outdoor space as a clean, unframed view — garden, planting, terrace, or aspect — at exactly the height where it is most directly experienced. There is no handle in the sightline, no hinge detail at the edge, no vent indicator suggesting a mechanism that does not exist. Just clear A-rated double glazing in a slim Chartwell Green border, doing precisely what a fixed pane is designed to do — letting the light in and the view through, without getting in the way of either.

For rooms where the most valued aspect is to the left of the opening — the established garden planting, the rural view, the south-facing terrace — the lower left fixed pane ensures the window serves that aspect completely. The decision to place the casement on the right rather than the left means the view on the left is never interrupted by a handle, a hinge, or an open sash at any point. The left side of the window is always clear — in every season, in every weather, at every time of day.

Lower Right Casement — Right-Hand Ventilation, Independent Operation

The side-hung casement in the lower right section opens outward on its right-hand hinge when ventilation is needed, swinging fully clear of the frame to create a generous opening at mid-to-lower frame height. Hinged on the right and opening rightward, it directs incoming air from the right side of the opening — drawing fresh air across the room from right to left, past the fixed lower left pane, and toward the interior of the room beyond the window.

For rooms where the furniture arrangement places occupants to the left of the window — a sofa or dining arrangement below or to the left of the opening — right-hand ventilation delivers fresh air across the occupied zone more directly than left-hand ventilation would. The incoming air crosses the full width of the window’s lower section before reaching the room’s main occupation zone, giving it more opportunity to mix with the room air and reach a comfortable temperature before it is directly felt.

The casement operates completely independently and is secured in the closed position by a multi-point locking system engaging at multiple points along its full height, with a lockable push-button handle as standard. It can be opened to any degree from fully closed to fully open, and held at any intermediate position by the friction of the hinge mechanism — giving the occupant precise control over ventilation intensity at every moment.

Thermal Performance — Consistent and Sustained

All four panes in this double glazed uPVC window are specified to identical thermal standards throughout. The 70mm multi-chamber uPVC frame, 28mm argon-filled sealed units, soft coat low-E glass, and warm-edge black superspacer bar deliver a U-value of 1.3 W/m²K across every light — the twin fixed top lights, the fixed lower left pane, and the side-hung casement — meeting Part L Building Regulations consistently across the full four-light frame.

The continuous horizontal rail is the thermally critical junction in this window — a wide frame element crossing the complete internal width at mid-height with surfaces on both the inside and outside of the building. Our 70mm multi-chamber profile addresses this with sealed air chamber construction at the rail section, maintaining consistent thermal resistance across the full width and eliminating the condensation strip and cold bridge that develop at this junction in single-chamber or thinly profiled windows.

The warm-edge black superspacer bar works across all four sealed units, keeping the glass edge warm and condensation-free even in the coldest weather. The soft coat low-E glass reflects long-wave heat radiation back into the room during the heating season. The argon fill between the panes slows convective heat transfer across the cavity. Every element of the specification is purposeful, and the combined effect is a window that performs at A-rated standard across its full four-light width without variation between sections.

Right-Hand Configuration — Pairing with the Left-Hand Version

This right-hand twin top light casement configuration pairs naturally with our left-hand equivalent for homeowners replacing two windows on a symmetrical elevation. Ordered together, the pair creates a perfectly balanced bilateral arrangement — left casement on one window, right casement on the other — with twin top lights spanning the upper section of both frames at the same height. From the street, the two windows create a composed, symmetrical composition that reads as considered and intentional. From inside the rooms they serve, each window ventilates from the side nearest the room’s natural airflow path while keeping the opposite fixed pane clear for the view.

Our team can advise on pairing configurations, matching dimensions, and ensuring consistent proportions across paired windows before you place your order.

Chartwell Green — The Finish That Makes the Difference

In Chartwell Green, the twin top light casement configuration has an authority and character that white uPVC cannot replicate. The soft sage tone runs across the continuous horizontal rail, the twin top light dividers, the central mullion, and the outer border with a consistency that ties all four lights into a single cohesive design. The fully sculptured 70mm profile gives every frame element the moulded depth and shadow detail that distinguish quality window manufacturing from commodity production. And the co-extruded Chartwell Green finish — guaranteed not to fade, peel, warp, or discolour, backed by a full 10-year profile guarantee — ensures the window looks exactly as it does today in ten years, twenty years, and beyond.

These uPVC casement windows require no painting, no staining, and no maintenance beyond an occasional wipe with a damp cloth across the full four-light frame and sill.

Security Across All Four Panes

The right-hand side-hung casement is secured by a multi-point locking system engaging at multiple points along the full height of the opening light, with a lockable push-button handle as standard. All four panes across the complete frame are retained by internal glazing beads, preventing glass removal from the exterior on any section. Patented double-action bubble gaskets run the full perimeter of the casement, maintaining a consistent weathertight and draught-proof seal in all conditions. The three fixed panes — twin top lights and lower left fixed — are held in a rigid welded frame with no mechanical entry points.

Specification at a Glance

• Energy Rating: A-rated | U-value 1.3 W/m²K
• Configuration: 4-light — fixed top light upper left, fixed top light upper right, fixed pane lower left, side-hung casement lower right
• 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 right-hand casement
• Handles: Lockable push-button handle as standard
• Beading: Internal across all four panes for maximum security
• Gaskets: Patented double-action bubble gaskets on casement
• 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. Our team is available for sizing queries, handing advice, and pairing guidance before you place your order.

When the View Is on the Left and the Ventilation Belongs on the Right

The room tells you which configuration it needs. When the view is on the left, the furniture faces left, and the right side of the opening is the natural place for fresh air to enter — this is the window. Twin fixed top lights anchoring the upper section with traditional divided-light proportions. A clean fixed lower left pane keeping the view completely unobstructed. A right-hand casement opening precisely where the room needs it to. And a sculpted Chartwell Green frame tying all four lights into one of the most architecturally grounded and practically resolved designs in our entire Chartwell Green uPVC window range.