uPVC Window Air Vents – Full Range of Standard & Custom Slot Vents for Aluminium Frames

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The uPVC Window Air Vents range offers a straightforward, reliable solution for providing background ventilation in new and replacement windows. Available in three standard lengths and three popular colours, these slot vents are designed to integrate seamlessly into aluminium and uPVC window frames. Whether you are fabricating a single casement window for a residential renovation or producing hundreds of units for a multi-storey apartment block, our vents provide a consistent, tested airflow performance that helps your windows comply with building regulations and keep occupants comfortable.

uPVC window air vent dimensional drawing showing overall length, slot width, end cap design, and slider position

Each vent is extruded from durable, UV-stabilised uPVC, making it resistant to sunlight, moisture, and the wear of daily use. The simple but effective slider mechanism allows the end user to adjust the airflow from fully open to fully closed. An integrated insect mesh and a rain baffle ensure that the vent remains clear of debris and water even during heavy rain. The compact, low-profile design sits flush within the window head, maintaining the clean sightlines that architects and homeowners value in modern aluminium window profiles.

As a supplier of high-quality aluminium extrusions for over 29 years, Shengxin understands that fabricators need more than just frame profiles — they need a complete bill of materials they can rely on. That is why we stock and supply this standard range of uPVC window air vents alongside our thermal break aluminium profiles and other accessories. By placing a single order with us, you can receive your frame profiles, gaskets, and these essential background ventilators in one consolidated shipment, simplifying your procurement process and reducing freight costs.

Features & Benefits

Standardised range for easy selection: Choose from three lengths (250mm, 350mm, 450mm) and three colours (white, brown, beige) — a clear, uncomplicated product matrix that covers the vast majority of residential and commercial window projects.
Consistent airflow performance: Each vent delivers a known, tested equivalent area — approximately 2500 mm² (250mm), 3500 mm² (350mm), and 5000 mm² (450mm) — helping you meet specified ventilation rates per EN 13141-1 and national building codes.
Durable and low-maintenance uPVC body: The UV-stabilised material retains its colour and strength for decades, does not require painting, and can be cleaned with a simple wipe. No corrosion, no rust, no peeling — ideal for coastal and high-humidity environments.
Fits standard 12mm or 14mm slots: The vent profile is machined to fit securely into either 12mm or 14mm routed slots, the two most common cutter sizes used by aluminium and uPVC window machinery. No special tooling or adaptors required.
Snap-fit or screw-fix installation: Vents can be installed quickly by pushing them into the routed slot (snap-fit), or secured with colour-matched screws for permanent, tamper-resistant fixing in high-use locations.
Cost-effective and readily available: Because these are standard models, we maintain buffer stock in our warehouse, allowing fast dispatch for both sample requests and high-volume production orders.

Standard Range at a Glance

All models share the same slot width options, fixing methods, and compliance documentation. Select the length and colour that best suit your window design.

Model	Length	Equivalent Area	Slot Width	Colours Available
V-250	250 mm	~2500 mm²	12 mm / 14 mm	White, Brown, Beige
V-350	350 mm	~3500 mm²	12 mm / 14 mm	White, Brown, Beige
V-450	450 mm	~5000 mm²	12 mm / 14 mm	White, Brown, Beige

Need a different length or a custom colour? See our Custom Vent Solutions section below — bespoke options are available for volume orders.

EN 13141-1 certified airflow performance certificate for standard range uPVC window air vents

Technical Specifications

Material	UV-stabilised uPVC, impact-resistant grade
Standard Lengths	250 mm / 350 mm / 450 mm (custom lengths available)
Slot Width	12 mm or 14 mm (specify when ordering; both options fit standard window tooling)
Equivalent Area Range	~2500 mm² (250 mm) / ~3500 mm² (350 mm) / ~5000 mm² (450 mm) per vent
Airflow Control	Manual slider with positive closed position; insect mesh and rain baffle integrated
Colour Options	White (RAL 9016), Brown (RAL 8014), Beige (RAL 1015); other RAL colours on request
Installation	Snap-fit or screw-fix; screws and end caps supplied with each vent
Compliance & Testing	EN 13141-1, CE marked; meets UK Approved Document F and similar international regulations

Common Applications for uPVC Window Air Vents

Residential casement and tilt-turn windows: Our V-350 model is the most popular choice for standard bedroom and living room windows, providing sufficient background ventilation for a typical room while remaining discreet in the frame head.
Apartment and multi-dwelling developments: Specifiers choose our standard white or brown vents to match aluminium frame finishes across hundreds of identical window units. Consistent, documented airflow performance helps secure building control approval for the entire development.
Renovation and window replacement projects: When old windows are replaced with modern, airtight units, installing slot vents is often a mandatory requirement under current building regulations. Our vents retrofit easily into new aluminium windows, helping the upgrade meet ventilation standards.
Social housing and public sector buildings: Maintenance-free operation and robust uPVC construction make these vents a preferred choice for housing associations, schools, and healthcare buildings where long-term reliability and low running costs are essential.
Commercial office partitions and glazed screens: Where aluminium-framed internal glazing requires trickle ventilation for fresh air circulation, our compact vents provide the necessary airflow without compromising the clean, professional appearance of the installation.

Customisation & Supply Options

Service	Capability
Custom Vent Lengths	Any length from 200 mm to 1000 mm can be manufactured to order for volume projects
Bespoke Colour Matching	Custom RAL colours matched to your aluminium frame powder coat or foil finish
Slot Width Variations	12mm and 14mm as standard; other slot widths evaluated on request
Bulk Packaging & Kitting	Vents packed in boxes of 50 or 100 units, or kitted with your aluminium profile order for direct-to-site delivery
Consolidated Logistics	Combine vent shipments with aluminium door and window profiles to minimise freight costs and simplify customs clearance
Documentation Package	EN 13141-1 test reports, CE Declaration of Performance, and installation instructions provided

Shengxin global distribution centre with uPVC ventilation products being palletised for export shipment

Why Source Window Air Vents from Shengxin?

Shengxin is best known for extruding premium aluminium profiles, but our true value to window fabricators lies in being a dependable, single-source supplier. By stocking this uPVC window air vent range alongside our insulated aluminium frame profiles, we save you the time, paperwork, and shipping costs of dealing with multiple component vendors. Our 29-year track record in the fenestration industry means we understand the importance of on-time delivery, accurate documentation, and consistent product quality — whether the item is a metre-long aluminium extrusion or a small plastic vent.

Ready Stock, Quick Response

We keep buffer inventory of our standard V-250, V-350, and V-450 vents in white and brown. Small trial orders can often be dispatched within days, not weeks.

Audited Manufacturing Partners

Our uPVC vents are produced by ISO 9001-certified specialists. We audit their processes and inspect incoming stock to ensure every vent meets our quality standards.

One Order, One Shipment

Add vents to your aluminium profile purchase order. Everything arrives on the same truck or container, reducing your inbound logistics workload and carbon footprint.

Global Reach, Local Standards

Exporting to 97 countries with $120 million in assets and a 5,000-ton warehouse. We provide the compliance documentation you need for CE marking and local building authority submission.

Your single point of contact for window components: Whether you need 50 vents for a pilot project or 5,000 for a production contract, our team can manage the supply from inquiry to delivery, answering technical questions along the way.

uPVC Window Air Vents FAQ

Q: How many vents do I need per window?

A: This depends on the room type and the required equivalent ventilation area defined by your local building code. As a general guide, a habitable room (bedroom, living room) typically needs around 5000 mm² of background ventilation. This can be achieved with a single V-450 vent, or two V-250 vents — one at each end of the frame head — which can improve air distribution.

Q: Will these vents fit my existing window fabrication machinery?

A: Almost certainly. The 12mm and 14mm slot widths we offer correspond to the standard cutters used on the majority of aluminium and uPVC window machining centres. If you already rout slots for trickle vents, these vents will fit. If you are unsure, we can provide a dimensioned drawing of the vent profile for your tooling supplier to verify.

Q: Can I mix and match different lengths and colours in one order?

A: Yes. We understand that a single window contract might require white vents for one elevation and brown vents for another, or different lengths for different window sizes. You can order a mixed schedule of models, lengths, and colours, and we will pack and label each line item clearly for your convenience.

Q: Are these vents suitable for exposed coastal locations?

A: Yes. The uPVC body is inherently resistant to salt spray, and the integrated rain baffle and insect mesh prevent wind-driven rain and debris from entering the building. For extreme exposure conditions, we recommend the screw-fix model for additional mechanical security.

Q: Do you supply vents in other colours besides white, brown, and beige?

A: For volume projects, we can arrange custom colour matching to a specific RAL reference. This ensures the vents blend seamlessly with your aluminium frame finish. Minimum order quantities and lead times for custom colours are available on request from our sales team.

Custom-length 600mm uPVC window air vent with grey RAL 7016 colour-matched body and end caps for a commercial aluminium window project

Custom Window Air Vent Options

For projects where standard vents do not meet the specification, Shengxin can coordinate custom-manufactured uPVC window air vents to your exact requirements, from bespoke lengths and RAL colours to alternative slot widths and end cap designs.

How It Works:

Tell us your specification — vent length, slot width, RAL colour, and annual volume forecast.
We source from our audited uPVC partners — a custom extrusion is set up, and pre-production samples are made.
Receive a quotation — including unit price, any one-off tooling charges, and delivery lead time.
Approve the sample — we ship physical vent samples for your fit, colour, and performance approval.
Full production & dispatch — vents are manufactured, packed, and delivered on your schedule, with full documentation.

⚠️ Important Note: All vent images and technical drawings on this page are indicative. Final dimensions, colour, and equivalent area will be confirmed in your order specification and pre-production sample. Please contact our team to discuss your project requirements before placing a custom order.

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