How does the Sentinel minimise the aesthetic impact on a heritage façade compared to standard vents?

Standard vents often protrude or feature highly visible modern louvres. The Sentinel uses a unique **deep-cowled design** and a non-reflective black cast iron finish to effectively hide the termination point of the ventilation duct from most viewing angles. It is designed to be **visually recessive**, maintaining the integrity of the period architecture.

Where can I download the technical drawings, BIM objects, and compliance data for my planning submission?

All professional documentation, including CAD files, BIM objects, and a definitive compliance statement for **Approved Document F and conservation use**, is available in our **Technical Specification Pack**. You can download the complete, un-gated pack using the link immediately above the product description.

SENTINEL Cast Iron Black Conversation Vent Grille

SENTINEL Cast Iron Black Conservation Vent Grille

Price range: £325.00 through £405.00 + VAT

Free Area7200mm2, 11100mm2

Spigot Diameter103mm, 148mm

SuitsFLUXO 100, ARIA 100, FLUXO 150, ARIA 150

FinishBlack Cast Iron

Black Cast Iron Cowled Grille. The authentic external termination for modern conservation ventilation.

Stop the aesthetic struggle. Working on listed properties means every visible component is scrutinised. You need 21st-century ventilation, but you cannot compromise the facade. The VENTI Sentinel solves this dilemma. It provides immediate visual authority for planning officers and clients.

The Sentinel is designed to be the perfect companion for our active systems. It works seamlessly as the external grille for the VENTI AUREN, FLUXO, and ARIA fans. Specify modern air management with a timeless external finish. Compliance has never looked this discreet.

Forget short-lived substitutes. Cast in England using traditional methods, this grille delivers essential airflow while the deep cowl minimises visibility and weather ingress. Specify permanence. The solid, black cast iron will outlast any building system—patina, not degrade. It is a fit-and-forget solution.

Free Area

Spigot Diameter

Suits

Clear

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Yes. The Sentinel is engineered specifically to ensure modern mechanical ventilation systems (like MVHR and dMEV) comply with Approved Document F. Its deep, discreet cowl and traditional British cast iron construction are designed to satisfy the aesthetic and material requirements typically enforced by Conservation Officers and Planning Departments, eliminating the need for bulky, modern alternatives.

Absolutely. Unlike fabricated or lighter-gauge metals that can rust and fail, our Sentinel grilles are British-cast using traditional methods, ensuring a solid construction designed for permanence. The material is meant to develop a rich patina, ensuring a fit-and-forget solution that outlasts the lifetime of the building system it serves, dramatically reducing long-term maintenance costs.

The Sentinel is primarily designed as the ideal external termination for VENTI’s high-performance FLUXO (srMVHR) and ARIA (dMEV) systems. Its spigot diameter options (103mm and 148mm) allow it to connect seamlessly with standard ductwork, but it is optimized to provide the perfect balance of free area (airflow) and weather protection for modern active systems.

	SENTINEL Cast Iron Conservation Vent Grille
SKU
Product Description	Authentic, traditional cast iron, deep-cowled external wall terminal. Designed specifically for discreet and aesthetically compliant termination of 100mm (nominal) diameter ventilation ducting in heritage or conservation environments.
Key Technical Detail	Spigot Diameter: 103mm (to suit standard 100mm/4 inch diameter ductwork) or 148mm (to suit standard 150mm/6 inch diameter ductwork). Material: Solid Cast Iron. Finish: Hard-wearing Black (Painted/Coated).
Free Air Area	7,200mm2 / 11,000mm2
Standards & Compliance	The aesthetic design meets the visual standards required for planning consent in Listed Buildings and Conservation Areas. Non-combustible material to support fire safety.
Risk Mitigation	Deep cowl design effectively minimises wind-driven rain ingress and prevents back-draughts in prevailing wind positions. Solid cast iron construction prevents UV degradation and damage, unlike plastic alternatives.
Environmental/Sustainability	Material Origin: Cast in England using traditional methods. Durability: Solid cast iron is designed for permanence, offering superior longevity and achieving a natural patina over decades.
Installation Requirements	The spigot requires a core-drilled hole (nominally 100-103mm / 148-150mm) through the external wall. External face mounting is achieved via fixing points in the corner lugs.
Safety Precautions	Standard manual handling precautions for working with heavy, brittle cast iron components. Ensure adequate wall fixing strength to support unit weight.
Maintenance Frequency	Maintenance is minimal ("fit-and-forget"). Periodic inspection is required to ensure the cowl and grille remain clear of excessive debris. Exterior finish may require repainting over time if a high-gloss black aesthetic is to be strictly maintained.