Estimated Delivery: 2–5 Working Days
Enter postcode in checkout for delivery cost
View transport policyThe S&P CRHT/4-400 400 mm Roof-Mounted Ventilation Fan is a powerful centrifugal extraction fan designed for efficient roof ventilation in commercial and industrial HVAC systems. It features a low-profile horizontal discharge design that allows high airflow performance while minimizing roof installation height. The fan uses a high-efficiency backward-curved centrifugal impeller combined with a three-phase external rotor motor to deliver reliable airflow and energy-efficient operation. Built with a galvanised steel base and spun aluminium weather cowl, the unit is engineered for long-lasting durability and protection against outdoor environmental conditions.
Base: Heavy-duty galvanised sheet steel for strength and corrosion resistance.
Cowl: Spun aluminium weather hood designed for outdoor roof installation.
Impeller: Backward-curved centrifugal impeller for efficient airflow performance.
Motor: External rotor three-phase AC motor with built-in thermal protection.
Guard: Steel finger-proof safety guard to prevent debris entry.
Product Type: Centrifugal Roof-Mounted Ventilation Fan
Model: CRHT/4-400
Fan Diameter: 400 mm
Airflow Capacity: Up to ≈4,156 m³/h
Static Pressure: Approx. 108 Pa
Motor Type: External rotor three-phase AC motor
Voltage: 230/400 V – 50/60 Hz
Speed: Approx. 1379 RPM
Power Input: Approx. 0.426 kW
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.
