Estimated Delivery: 2–5 Working Days
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View transport policyThe Elta SMB450 Inline Mixed Flow Box Fan – 450 mm Single Phase AC is a high‑efficiency duct‑mounted ventilation fan designed for commercial and industrial HVAC systems. Part of the Multiflow SMB mixed flow box fan range, it features a robust pre‑galvanised steel casing with Ductmate flange connections for easy installation and backward‑curved aerofoil blades for superior airflow performance and low noise. With a single‑phase AC external rotor motor and suitability for operating temperatures up to +60 °C, the SMB450 is ideal for extraction and supply applications in workshops, factories, commercial buildings and large duct networks.
Casing: Heavy‑duty pre‑galvanised sheet steel construction with flange connections for straightforward duct mounting.
Impeller: Mixed flow, backward‑curved aerofoil blades for high volume airflow, efficiency and reduced acoustic emissions.
Motor: Single‑phase AC external rotor with sealed bearings for reliable performance.
Operating Temp: Rated for ambient temperatures up to +60 °C.
Product Type: Inline Mixed Flow Box Fan – Multiflow SMB Series
Model: SMB450 / 4‑1AC (Single‑Phase AC)
Fan Diameter: 450 mm
Casing Material: Pre‑galvanised sheet steel (flanged connections).
Impeller Type: Backward‑curved aerofoil mixed flow blades.
Motor Type: Single‑phase AC external rotor with sealed for life bearings.
Operating Temp: Up to +60 °C ambient air.
Installation: Inline duct mounted with Ductmate flange connections.
Applications: HVAC extract/supply systems, ducted ventilation in commercial, industrial and large buildings.
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.
