Estimated Delivery: 2–5 Working Days
Enter postcode in checkout for delivery cost
View transport policyThe Back-Draught Shutter (BDS) is a mechanical device installed in ductwork to prevent reverse airflow when a fan or ventilation system is not operating. It automatically closes when air pressure drops, stopping unwanted drafts, heat loss, or ingress of dust and contaminants. Back-draught shutters are commonly used in HVAC supply, extract, and exhaust systems for commercial, industrial, and residential applications.
Material:
Casing: Galvanised steel or stainless steel for durability and corrosion resistance
Blades: Aluminium or steel, lightweight for smooth operation
Hinges/Shafts: Stainless steel or zinc-plated steel for long-lasting movement
Seals (optional): Rubber or silicone to minimise leakage
Specifications:
Type: Gravity-operated or spring-assisted back-draught shutter
Sizes: Available in circular and rectangular ducts, custom sizes as required
Pressure Rating: Suitable for low to medium pressure duct systems
Mounting: Inline duct installation, wall, or roof openings
Blade Operation: Opens under positive airflow and closes automatically under reverse flow
Finish: Galvanised steel standard; powder coating or stainless steel optional
Applications: Supply, extract, and exhaust air systems in HVAC installations
Optional Features: Motorised actuation, locking mechanism, and weatherproof option
At Direct Duct Supplies, we are committed to delivering your orders quickly, safely, and efficiently. Below you will find our shipping procedures and policies. If you have any specific delivery deadlines or special requirements, please contact our team and we will do our best to assist.
We work hard to get our customers what they need when they need it. Below you will find information on our delivery service. If you have a particular need or deadline, please contact us and we’ll do our best to accommodate you.
Delivery Charges
Delivery charges vary depending on the size, weight, and value of your order. Shipping costs are calculated at checkout and clearly displayed on the My Basket page before you complete your purchase.
We offer a range of delivery options, including free delivery on selected orders, with standard delivery charges typically ranging between £20 and £40 depending on the service selected.
Delivery Time (UK)
We offer fast and reliable UK delivery, with most orders arriving within 2–5 working days from the date of purchase.
Smaller items typically arrive within 2–4 working days, while larger or heavier items may take 3–5 working days. Delivery times may vary slightly during busy periods or holidays.
Easy & Convenient Delivery
We use a combination of in-house logistics and trusted UK courier partners including Royal Mail, DPD and DX. This allows us to provide reliable delivery coverage across the UK. Once your order has been dispatched, you will receive an email confirmation with tracking details. You can also track your delivery via the My Account section.
Next Day Delivery
We offer next working day delivery on selected items and order types. Availability and pricing depend on the size, weight, and order value. Please contact us prior to ordering to confirm eligibility and we will do our best to arrange this.
International, Scottish Highlands, Islands & Northern Ireland
We are able to ship orders internationally, as well as to the Scottish Highlands and offshore locations. Please contact us for a delivery quote before placing your order.
Please note that some items may not be eligible for international shipping due to size or weight restrictions.
