Estimated Delivery: 2–5 Working Days
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View transport policyThe S&P CRHB/4-225 N 225 mm Roof-Mounted Fan is a compact centrifugal roof ventilation unit designed for reliable airflow in commercial and industrial buildings. It features a horizontal discharge design with a very low-profile structure, making it ideal for roof installations where height is limited. The fan uses a high-efficiency backward-curved impeller and an external rotor motor for strong airflow and energy-efficient operation. Built with a galvanised steel base and aluminium weather cowl, the unit provides durable protection against outdoor conditions and long-term ventilation performance.
Base: Galvanised sheet steel construction for durability.
Cowl: Spun aluminium weather protection hood.
Impeller: High-efficiency backward-curved centrifugal impeller (plastic on smaller models).
Motor: External rotor motor with thermal overload protection.
Guard: Steel bird-proof safety guard to protect the impeller.
Product Type: Centrifugal Roof-Mounted Fan (CRHB Series)
Model: CRHB/4-225 N
Fan Diameter: 225 mm
Discharge Type: Horizontal roof discharge
Motor Type: External rotor AC motor
Voltage: 230 V / 50–60 Hz (Single Phase)
Protection Rating: IP54, insulation class F
Max Airflow: Approx. 740 m³/h
Speed: Approx. 1400 rpm
Max Temperature: Up to 70 °C continuous operation
Noise Level: Approx. 42 dB(A)
Installation: Roof mounted on flat or mounting base
Applications: Commercial buildings, warehouses, factories, workshops, and general HVAC extraction systems
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.
