Chartwell Green UPVC Window-design 69

Description

Chartwell Green uPVC Left-Hand Combination Casement Window — Layered Left Ventilation, Unobstructed Right View

There is a particular satisfaction in a window configuration that places every element exactly where the room needs it. Our Chartwell Green uPVC Left-Hand Combination Casement Window achieves precisely that — concentrating all ventilation function into the left-hand section of the frame through two independently operated opening lights, while dedicating the right-hand section entirely to natural light and an unobstructed view through a full-height fixed pane. The result is a window where the active and passive sections each do their job completely, without either compromising the other.

This configuration is an especially natural choice for rooms where the primary outlook is to the right of the opening — a garden feature, a planted border, a view across a landscape — and where ventilation can be handled discreetly on the left without interrupting that view with opening hardware across the right-hand portion of the frame.

Two Opening Lights, One Left-Hand Section

The left-hand section of this window is divided horizontally into two independent zones, each with its own opening light and its own ventilation role.

At the top, the top-hung vent opens outward from its upper edge, tilting away from the frame to create a ventilation gap at the head of the left section. This is the window’s background ventilation light — the one that can be left open continuously without any concern about rain ingress, because the top-hung action deflects water away from the opening naturally. Warm air rises from the room and escapes at ceiling level through this vent, maintaining a constant gentle flow of fresh air through the space without creating draughts at occupant level. It is the ventilation light for overnight use, for kitchens during and after cooking, and for any room where background air quality needs to be maintained around the clock.

Directly below it, the side-hung casement occupies the lower portion of the left section. Opening outward on its left-hand hinge, it swings fully clear of the frame when more active ventilation is needed — on warm days, after exercise, or whenever a strong flow of fresh air through the room is the priority. The full opening width of the casement at this height level delivers airflow directly into the occupied zone of the room, working in complement to the overhead top-hung vent to circulate air thoroughly through the space when both lights are open simultaneously.

The combination of top-hung vent above and side-hung casement below in the same left-hand section gives this window a ventilation capability that neither light could provide alone. The top vent handles height. The casement handles volume. Together they address every ventilation need the room is likely to have — from the gentlest background refresh to the most thoroughgoing air change — through two simple, independently operated controls concentrated in a single section of the frame.

The Right-Hand Section — Light First

The right-hand section of this window is given over entirely to glazing and natural light. The full-height fixed pane below and the fixed top light above together span the complete height of the right-hand frame from sill to head — two fixed panes stacked vertically with a single horizontal rail between them, delivering light at every level of the right-hand section without any opening hardware interrupting the glazed area.

The full-height lower fixed pane is the dominant light in this section. Running from just above the sill to the horizontal rail, it delivers the primary natural light contribution of the right-hand section and provides the clean, unobstructed view that makes this configuration so well suited to rooms where the outlook on the right side of the opening is the view worth preserving. No handle, no hinge, no vent indicator — just clear A-rated double glazing in a slim Chartwell Green frame.

The fixed top light above the rail completes the right-hand section at the head, maintaining the proportional consistency of the upper frame across the full width and contributing additional light to the upper right of the room. Its presence ensures the window reads as a cohesive four-light composition rather than an asymmetric arrangement of active and passive elements.

Thermal Consistency From Corner to Corner

All four panes in this double glazed uPVC window are manufactured and specified to the same thermal standard. The 70mm multi-chamber uPVC frame maintains consistent thermal resistance across every section — outer border, horizontal rail, central mullion, and all junctions between fixed and opening sections. The 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 throughout, meeting Part L Building Regulations across the full four-light frame without variation between the active left section and the fixed right section.

The horizontal rail between the top-hung vent and the side-hung casement is a section that cheaper windows routinely handle poorly — a continuous frame element crossing the full left-hand width that can create a persistent cold bridge and condensation strip in lower temperatures. Our 70mm multi-chamber profile addresses this with the same sealed air chamber construction used throughout the frame, maintaining thermal performance at the rail as consistently as at any other point in the window.

Proportions That Feel Considered

The four-light layout of this window — two stacked opening lights on the left, two stacked fixed lights on the right — creates a composition with a clear visual logic. The left half is the working section; the right half is the viewing section. The horizontal rail on the left and its counterpart on the right sit at the same height, tying the two sections together across the full width of the frame and reinforcing the sense that the four lights belong to a single resolved design rather than being assembled from separate components.

In Chartwell Green, this considered layout is brought to life by the fully sculptured 70mm profile. The shadow lines and moulded edges of the frame elements — particularly the horizontal rails and the central mullion — give the four-light composition a depth and definition that a flat profile cannot achieve. The soft sage tone of the Chartwell Green finish sits across the full frame with the quiet confidence of a heritage colour that has been part of quality British window design for decades — tying the active left section and the passive right section into a single, unified window that looks right on any property.

The finish is co-extruded into the uPVC profile and is guaranteed not to fade, peel, warp or discolour, backed by a full 10-year profile guarantee. These uPVC casement windows require no painting, no staining, and no maintenance beyond an occasional wipe with a damp cloth — including both opening lights, which can be cleaned on their outer faces from inside the room when open.

Independent Security on Every Opening Light

Both the top-hung vent and the side-hung casement are independently secured with multi-point locking systems engaging at multiple points along the opening perimeter of each light. Lockable push-button handles are fitted to both opening lights as standard, providing secure, tool-free locking in the closed position. All four panes across the full frame are retained by internal glazing beads, preventing glass removal from the exterior on any section — opening or fixed. Patented double-action bubble gaskets run the full perimeter of both opening lights, maintaining a consistent draught-proof and weathertight seal in all weather conditions.

Specification at a Glance

• Energy Rating: A-rated | U-value 1.3 W/m²K
• Configuration: 4-light — top-hung vent upper left, fixed top light upper right, side-hung casement lower left, full-height fixed pane 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 top-hung vent and side-hung casement
• Handles: Lockable push-button handles on both opening lights
• Beading: Internal across all four panes for maximum security
• Gaskets: Patented double-action bubble gaskets on both opening lights
• 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 on hand for sizing queries and configuration advice before you place your order.

When the View Is on the Right and the Ventilation Can Be on the Left

Some openings have a natural logic to them — the view worth preserving is on one side, and the ventilation can be handled on the other without any conflict between the two. This left-hand combination casement is designed for exactly that situation. All ventilation is concentrated in the left section through two independent opening lights that cover every height level and every ventilation need the room is likely to have. The right section is given entirely to the view and the light — a full-height fixed pane and a fixed top light with no hardware, no interruption, and nothing competing with the outlook beyond the glass. It is one of the most practically resolved and visually balanced designs in our entire Chartwell Green uPVC window range.