Chartwell Green UPVC Window-design 41

Description

Chartwell Green uPVC Bottom-Hung Casement Window with Fixed Light — Inward Opening Ventilation, Outward Facing Style

Not all ventilation needs to push outward. In spaces where an externally projecting opening vent would cause an obstruction — a narrow side return, a window above a walkway, a frame positioned close to an adjacent wall or boundary — the bottom-hung hopper configuration offers a practical and elegant alternative. Our Chartwell Green uPVC Bottom-Hung Casement Window with Fixed Light brings this distinctive opening style together with a full-height fixed companion pane in a clean, proportionate four-light frame that performs to full A-rated specification throughout.

This is a window that solves a specific problem beautifully — and does so without any compromise on thermal performance, security, or the heritage character of the Chartwell Green finish.

The Hopper Opening Explained

A bottom-hung hopper window — sometimes called simply a hopper vent — is hinged at the bottom of the sash rather than at the side or top. When opened, the top of the sash tilts inward into the room, creating a ventilation gap at the head of the vent that directs incoming air upward toward the ceiling rather than directly into the occupied zone of the room. This directed airflow has several practical advantages that top-hung and side-hung vents cannot replicate.

Because the vent opens inward, there is no externally projecting sash to consider. The outer face of the window remains flush with the frame when the vent is open — making this configuration the correct choice wherever external projection would create a hazard, an obstruction, or a planning constraint. For ground-floor windows on busy pedestrian routes, for windows opening onto covered passageways or narrow side returns, and for windows positioned within reach of a neighbouring boundary, the hopper opening removes a practical problem that no amount of careful placement of a side-hung or top-hung vent can solve.

The directed upward airflow of an open hopper vent also reduces the sensation of cold draughts at occupant level — particularly relevant in kitchens, bathrooms, and utility rooms where ventilation is needed regularly but comfort must be maintained. The incoming air rises to the ceiling, mixes with the room air, and descends gradually rather than entering as a horizontal blast at face height.

The fixed top light above the hopper maintains the proportional structure of the left-hand section — dividing the frame height at the head in a way that gives the window a traditional transom character while keeping the hopper vent itself at a convenient operating height within the lower section of the frame.

Fixed Right Pane — Light Without Complication

The full-height fixed pane on the right-hand side of this window serves the room’s light requirements completely and without any mechanical complexity. Spanning the full height of the frame from sill to head, it brings natural light into the room across the entire right-hand section of the opening — generously, consistently, and without any frame element interrupting the view at eye level.

The contrast between the active left section — with its horizontal rail, its hopper vent, and the visual interest of an operating window — and the clean simplicity of the full-height fixed right pane gives this window a quiet compositional balance. The left side does the work. The right side brings the light. Together they create a window that is more visually interesting than a pair of identical fixed panes and more light-efficient than a window given over entirely to opening lights.

Thermal Performance Built Into Every Detail

All four panes in this double glazed uPVC window are built to the same rigorous thermal specification. 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 just 1.3 W/m²K throughout — A-rated performance that meets Part L Building Regulations and delivers genuine, measurable reductions in heat loss in everyday use.

The horizontal rail between the fixed top light and the hopper vent is a potential thermal weak point in lower-specification windows — a continuous frame element crossing the full width of the left section that can create a cold bridge between inside and outside. Our 70mm multi-chamber profile addresses this directly, maintaining the same level of thermal resistance at the rail as at every other section of the frame. The result is consistent performance from corner to corner, without the cold spots and condensation strips that appear on cheaper aluminium-reinforced or single-chamber frames at the same location.

Chartwell Green — Character in Every Detail

On a window with the particular configuration of this four-light design — the fixed top light, the inward-opening hopper, the full-height fixed companion pane — the quality of the frame profile determines how the design reads from both inside and out. A flat, uniform frame would make this window look assembled rather than designed. Our fully sculptured 70mm profile gives it coherence and character.

The moulded edges and shadow lines of the Chartwell Green frame run consistently across every element — the outer border, the horizontal rail, the central mullion, the hopper sash — tying the four-light composition together into a single resolved design. In Chartwell Green, the soft sage tone adds warmth and heritage character that makes this window look as though it belongs on the property rather than having been chosen from a catalogue.

The 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. Maintenance across all four panes requires nothing beyond an occasional wipe with a damp cloth — including the hopper sash, which can be cleaned on both faces from inside the room when the vent is open.

Security on the Hopper and Throughout

The hopper vent is secured with a multi-point locking system and a lockable push-button handle as standard — providing solid resistance to forced entry even when the vent is positioned at a reachable height. All four panes are retained by internal glazing beads throughout, preventing glass removal from the exterior on any section of the window. The fixed top light and the full-height right pane are held in a rigid welded frame with no mechanical entry points. Patented double-action bubble gaskets seal the full perimeter of the hopper vent, maintaining a consistent draught-proof and weathertight seal when the vent is closed.

Specification at a Glance

• Energy Rating: A-rated | U-value 1.3 W/m²K
• Configuration: 4-light — fixed top light left, bottom-hung hopper vent left, full-height 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 hopper vent
• Handles: Lockable push-button handle as standard
• Beading: Internal across all four panes for maximum security
• Gaskets: Patented double-action bubble gaskets on hopper 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. Our team is available to discuss the hopper configuration, sizing options, and suitability for your specific opening before you place your order.

The Right Window When Outward Opening Is Not an Option

Most windows open outward — and for most locations, that is perfectly appropriate. But there are spaces in every property where an outward-projecting sash creates a problem that cannot be designed around. For those spaces, the bottom-hung hopper configuration is not a compromise — it is the correct solution. Inward opening, directed upward airflow, no external projection, full A-rated thermal performance, and the Chartwell Green frame that makes every window in this range look as good as it performs. This four-light combination is one of the most practically intelligent and visually resolved designs in our entire Chartwell Green uPVC window range.