Air Valves for Supply and Extract Ventilation
Air valves form the final air inlet or outlet in many ducted ventilation systems. Depending on the type selected, they can either introduce fresh air into a room or extract stale air through the ductwork.
Their adjustable design also lets you regulate the volume of air passing through the valve. This helps achieve more balanced airflow while providing a clean, unobtrusive finish on walls or ceilings.
Our range includes metal and plastic supply and extract air valves, giving you options to suit different ventilation requirements and budgets.
Supply vs Extract Air Valves
The main difference is the airflow direction and purpose.
Use a supply air valve where you need to deliver air into a room from the ventilation system. An extract air valve is positioned where stale or humid air needs to be drawn from the room and into the ducting system.
Extract valves are commonly used in ventilation systems serving bathrooms, kitchens, and utility areas, while supply valves are used where fresh or treated air needs to enter a space.
Choosing the Right Air Valve
Start by checking whether your ventilation system requires a supply or extract valve. Then match the valve diameter to the connecting ductwork.
Our range covers common duct sizes from 100mm to 200mm, with metal and plastic options available.
The right choice depends on your flexible duct size, airflow requirements, installation location, and whether the valve is used for supply or extract ventilation. Always check the individual product specifications before ordering.
FAQs
1. What is an air valve in a ventilation system?
An air valve is a ventilation fitting at the end of ductwork that supplies or extracts air from a room. Many air valves can be adjusted to help control the amount of air passing through the opening.
2. What is the difference between a supply and an extract air valve?
A supply air valve delivers air into a room, while an extract air valve removes stale, humid or unwanted air through the ventilation system.
3. Where can ventilation air valves be installed?
Air valves are commonly fitted to walls or ceilings and can be used in domestic and commercial ventilation systems. The right location depends on the system's design and purpose.
4. What size air valve do I need?
Choose an air valve that matches your duct connection diameter. FlexibleDucting. com currently offers valves in common sizes, including 100mm, 125mm, 150mm, 160mm, and 200mm.
5. Are metal or plastic air valves better?
Both can provide effective ventilation. Metal air valves offer a durable finish, while plastic valves offer a lightweight, cost-effective option. Your choice will depend on the installation and your preferred finish.