Description
Chartwell Green uPVC Combination Casement Window — Versatile Ventilation, Stunning Proportions
Few window designs offer the same combination of ventilation flexibility and visual impact as our Chartwell Green uPVC Combination Casement Window. This sophisticated multi-light configuration brings together three distinct opening styles in a single frame — delivering independent control over airflow at different heights while creating a beautifully balanced, architecturally considered appearance from both inside and out.
Whether you’re replacing a tired wide window on a traditional farmhouse, a bay-fronted semi, or a contemporary extension, this design makes an immediate statement — in the UK’s most popular heritage window colour.
A Configuration That Works Harder
Unlike a standard two or three-light casement, this combination design gives you genuine flexibility over how and where you ventilate. The top-hung vent on the upper left opens outward from the top, allowing warm air to escape at ceiling level without any risk of rain ingress — ideal for kitchens, bathrooms, or any room where background ventilation is needed regardless of the weather outside.
The side-hung casements on the left and right open fully outward, providing strong through-ventilation when needed. Meanwhile, the large central fixed picture pane and fixed top lights ensure that even with all vents closed, the window floods the room with natural light across its full width.
It’s a design that adapts to your needs throughout the day and across every season.
Thermal Performance You Can Measure
Every pane in this double glazed uPVC window is fitted with 28mm argon-filled sealed units, soft coat low-E glass, and a warm-edge black superspacer bar — working together to achieve a U-value of just 1.3 W/m²K. That puts it firmly in the A energy rating band, exceeding Part L Building Regulations and helping to meaningfully reduce your heating bills across the colder months.
The 70mm multi-chamber uPVC frame adds another layer of thermal resistance, trapping pockets of air within the profile itself to slow heat transfer at the frame edge — the point where many cheaper windows fall short.
Slim Profiles, Architectural Character
The fully sculptured 70mm profile creates strong shadow lines and clean sightlines that echo the look of traditional painted timber joinery — without any of the maintenance burden. Ultra-slim meeting stiles between panes keep the glazed area as generous as possible, preserving your view and maximising daylight even in the fixed sections.
In Chartwell Green, this window brings a sense of considered design to any elevation. The soft sage tone sits naturally against brick, render, stone and cladding alike — and because the colour is integral to the uPVC profile rather than surface-applied, it will never chip, peel, or need touching up.
Security Across Every Opening
All opening casements are secured with a multi-point locking system and fitted with lockable push-button handles as standard. Every pane — opening and fixed alike — is internally beaded, meaning the glazing cannot be removed from outside the property. Patented double-action bubble gaskets maintain a consistent, weathertight perimeter seal on every vent, preventing both draughts and water ingress even in exposed locations.
Specification at a Glance
- Energy Rating: A-rated | U-value 1.3 W/m²K
- Configuration: Multi-light combination — top-hung vent, side-hung casements, central fixed picture pane, fixed top lights
- 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 all opening casements
- 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 your precise specification — enter your dimensions at checkout for a perfect made-to-measure fit. Need advice on sizing or configuration? Our team is always on hand to help.
Ideal for Wider Openings That Demand More
This combination casement is the natural choice when a standard two or three-light window simply won’t fill a wider wall opening with the right balance of ventilation and glazing. The mix of fixed and opening lights across the full width means you never sacrifice light for airflow — or airflow for light. It’s one of the most versatile and visually rewarding configurations in our entire Chartwell Green uPVC window range.
