Chartwell Green UPVC Window-design 32

Description

Chartwell Green uPVC Twin Vent Fixed Casement Window — Symmetrical Elegance, Intelligent Airflow

Symmetry has always been one of the defining characteristics of well-proportioned British window design — and our Chartwell Green uPVC Twin Vent Fixed Casement Window embodies that principle completely. Two top-hung opening vents positioned identically on the left and right of the frame flank a wide central fixed picture pane, creating a window with perfect bilateral balance, generous panoramic glazing, and a ventilation arrangement that distributes fresh air evenly across the full width of any room.

This is a window designed for spaces where the view and the light matter most — and where the ventilation, though essential, should work quietly in the background without dominating the frame or interrupting the outlook.

Balanced by Design, Effective by Engineering

The symmetrical placement of the two top-hung vents is not merely aesthetic. When both vents are open simultaneously, warm air exits evenly from both sides of the window at the same time, creating a balanced pressure differential that draws fresh air into the room more uniformly than an asymmetric arrangement could achieve. The result is noticeably better air circulation — particularly in wider rooms and open-plan spaces where air movement from a single vent at one end struggles to reach the far side of the room.

Each vent opens independently outward from its upper edge, tilting away from the frame to create a ventilation gap at the head of the pane. The top-hung action keeps the opening rain-resistant by design — the back face of the open vent deflects water away from the gap rather than allowing it in — making both lights safe to leave open in showery weather, overnight, or whenever background ventilation is needed without active supervision.

Beneath each vent, a full-height fixed pane completes the outer section of the frame, extending the glazed area downward to maximise both natural light and the sense of openness from inside the room. These lower fixed panes require no operation, no maintenance, and no hardware — they simply contribute to the overall glazing area and the clean, uncluttered appearance of the frame.

The wide central fixed picture pane between them is the visual centrepiece of the whole window. Spanning the full height of the frame without any horizontal rail dividing it, it delivers an unobstructed, panoramic view of whatever lies outside — garden, landscape, courtyard or street — framed on both sides by the sculpted Chartwell Green profile in a composition that feels genuinely considered rather than simply functional.

Thermal Consistency Across a Wide Frame

Wide combination windows present a particular thermal challenge — the greater the number of frame sections and junctions, the more opportunities there are for heat to escape at the edges. Our 70mm multi-chamber uPVC frame system meets this challenge directly. The sealed air chambers within the profile provide consistent thermal resistance across every section of the frame, maintaining the same insulating performance at the outer edges and at the central dividers as at any point across the full width.

The 28mm argon-filled sealed units, soft coat low-E glass, and warm-edge black superspacer bar complete the thermal package — delivering a U-value of just 1.3 W/m²K throughout. That is genuine A-rated performance across every one of the five panes, meeting Part L Building Regulations requirements and delivering real, measurable reductions in heat loss through what is often the widest glazed opening in the room.

The Chartwell Green Difference

There are coloured uPVC windows, and then there are windows finished in Chartwell Green — and the difference is more than colour. Chartwell Green has become the benchmark heritage finish for quality uPVC windows across the UK because it occupies a unique position: warm enough to feel traditional, restrained enough to feel contemporary, and versatile enough to work on virtually every property type from Victorian terrace to modern extension.

On this symmetrical five-light design, the colour does particular work. The twin vents mirror each other precisely across the central picture pane, and the Chartwell Green frame ties the whole composition together at the head, the sill, and the vertical dividers. From the street, it reads as a single, well-proportioned window rather than a collection of separate lights — and that cohesion is what gives these uPVC casement windows their kerb appeal.

The finish is co-extruded into the uPVC profile, not applied as a surface coating, so it cannot peel, chip, fade or discolour regardless of exposure or weather. A clean with a damp cloth is the full extent of the maintenance requirement, and the 10-year profile guarantee covers the finish as well as the frame.

Security on Both Opening Lights

Both top-hung vents are secured with independent multi-point locking systems and fitted with lockable push-button handles as standard. All five panes across the full width of the frame are retained by internal glazing beads, ensuring that no section of the glass can be removed from the exterior. Patented double-action bubble gaskets run the full perimeter of each opening vent, maintaining a consistent and draught-proof weather seal against wind, rain and cold air in all conditions.

Specification at a Glance

• Energy Rating: A-rated | U-value 1.3 W/m²K
• Configuration: 5-light — top-hung vent over fixed pane left, wide fixed picture pane centre, top-hung vent over fixed pane 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 both top-hung vents
• Handles: Lockable push-button handles as standard
• Beading: Internal throughout for maximum security
• Gaskets: Patented double-action bubble gaskets
• 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 fit across the full width of your opening. Our team is available to help with any sizing or configuration questions before you place your order.

When the View Comes First

This twin vent fixed configuration is the right choice when the priority is an unobstructed view across a wide opening — and the ventilation, though important, should stay out of the way of that view. The two top-hung vents sit discreetly at the head of the outer sections, doing their job quietly and effectively while the wide central picture pane and the generous fixed lower glazing give the room the light and outlook it deserves. It is one of the most elegant, most balanced, and most thoroughly resolved designs in our entire Chartwell Green uPVC window range.