Air Valves for Ventilation | Supply & Extract Valves

The Different Types of Air Valves for Ventilation Systems

When it comes to designing an efficient and comfortable indoor environment, air valves play a vital role in controlling airflow. Whether you need to supply fresh air into your home or extract stale air out, choosing the right valve can make a huge difference to performance, noise levels, and overall comfort.

At BPC Ventilation, we supply a wide range of ventilation air valves to suit every type of property and project. From premium frameless diffusers for modern interiors to cost-effective PVC air valves and robust metal options, our selection covers both style and functionality.

In this guide, we’ll explore the different types of air valves available, their key benefits, and how to choose between supply valves and extract valves for your ventilation system.

Ergovent Frameless Air Valves – Invisible Design, Premium Performance

For homeowners and architects who want a seamless finish, the Ergovent frameless diffuser range is the ultimate choice. These valves are designed to be plastered into the ceiling, leaving no visible edges. The result is a minimalist, modern, and discreet ventilation solution.

Ergovent KVADRO Frameless Air Valve (Diffuser)

Product Code: KVADRO-100

Square, flush-mounted design for a modern look.
Recessed installation with no visible edges.
Can be painted the same colour as the ceiling for an invisible finish.
Quiet operation, engineered for low-noise airflow.
Available in 100mm and 125mm sizes.
Premium build quality for long-term durability.

The KVADRO square frameless diffuser is ideal for contemporary interiors where style is just as important as performance.

Ergovent RONDO Frameless Ceiling Air Valve

Product Code: RONDO-100

Round, frameless diffuser with a plastered-in finish.
Fully paintable for seamless integration into any ceiling.
Whisper-quiet performance for maximum comfort.
Built with high-quality, durable materials.
Available in 100mm, 125mm, and 160mm sizes.

The RONDO round air valve offers the same invisible finish as the KVADRO but with a softer, circular design. Both options are perfect for design-led homes and commercial interiors.

Quiet-Vent PVC Air Valves – Cost-Effective & Reliable

If you’re looking for practical and affordable ventilation valves, the Quiet-Vent PVC range is a trusted choice for both residential and commercial applications.

Quiet-Vent 125mm PVC Air Supply Valve

Product Code: QV-125AVP-S

Made from durable PVC for long-lasting performance.
Designed for efficient supply airflow control.
Easy installation with 125mm ducting.
Compact size (165mm diameter) for space-saving installations.

This supply air valve delivers fresh, filtered air into living spaces, ensuring healthy indoor air quality.

Quiet-Vent 125mm PVC Air Extract Valve

Product Code: QV-125AVP-E

High-quality PVC construction for durability.
Designed for smooth and efficient air extraction.
Compatible with standard 125mm ducting.
Compact 165mm diameter.

This extract air valve removes stale air, moisture, and odours, preventing condensation and maintaining a fresh indoor climate.

Metal Air Valves – Durable and Adjustable

For more traditional applications, metal supply and extract air valves are a strong and versatile option.

Constructed from robust metal with a white powder-coated finish.
Adjustable airflow control by simply twisting the valve plate.
Suitable for both residential and commercial ventilation systems.
Highly durable, providing long-term reliability.

These valves are an excellent all-round solution where strength, adjustability, and affordability are priorities.

Supply Valves vs. Extract Valves – What’s the Difference?

Understanding the difference between supply and extract valves is key to creating a balanced and efficient ventilation system:

Supply Air Valves bring fresh, filtered air into the property, improving comfort and indoor air quality.
Extract Air Valves remove stale, humid, or polluted air, helping to prevent condensation, mould, and odours.

In a well-designed MVHR (Mechanical Ventilation with Heat Recovery) system, both types of valves are strategically placed to ensure a constant flow of clean, comfortable air.

Choosing the Right Air Valve

At BPC Ventilation, we stock a wide range of ventilation air valves to suit any project:

Ergovent Frameless Diffusers → The best choice for high-end, modern interiors.
Quiet-Vent PVC Valves → A cost-effective solution for supply and extract airflow.
Metal Valves → A classic, durable option with easy adjustability.

No matter which type you choose, the right combination of supply and extract air valves will help you achieve maximum comfort, efficiency, and air quality.

✅ Browse our full range of air valves today and discover the perfect solution for your ventilation system.