A centrifugal box fan is a centrifugal fan in an insulated box, used for quiet ducted supply and extract.
We list sizes from 12 to 48 inch. Choose a size by airflow and duct size.
What is a centrifugal box fan?
A centrifugal box fan is a centrifugal fan and motor inside a rectangular, often acoustically lined, box. Ducts connect to the inlet and outlet, so the fan can sit in a ceiling void, plant room or roof.
The box reduces noise and protects the fan. Therefore, box fans are popular for kitchens, offices and commercial buildings where quiet ducted ventilation matters.
Further reading
- Centrifugal fans (Wikipedia)
- Ventilation in buildings (Wikipedia)
- Kitchen hoods (Wikipedia)
Key terms explained
- Acoustic lining
- Sound-absorbing material inside the box that cuts noise.
- Access panel
- A removable panel for cleaning and servicing.
- Airflow (m3/h or CFM)
- How much air a fan moves. 1 m3/h is about 0.59 CFM.
- Static pressure
- The resistance a fan must push against from ducts, filters and grilles, in pascals (Pa).
- Air changes per hour (ACH)
- How many times the air in a room is replaced each hour.
Features and benefits
- Quiet, enclosed design.
- Duct connections both sides.
- Sizes from 12 to 48 inch.
- Access panel for service.
Technical specifications
| Product | Centrifugal box fan |
|---|---|
| Sizes | 12 to 48 inch |
| Supplier | Sparks Plumbing Experts Ltd, Nairobi |
| Supplier | Sparks Plumbing Experts Ltd, Nairobi |
Sizes, grades and ratings depend on stock and model. Tell us what you need, and we will confirm before you order.
Applications of a centrifugal box fan
- Commercial kitchens. Extract behind hoods.
- Offices. Fresh air supply.
- Restaurants. Dining room ventilation.
- Hotels. Corridor and toilet extract.
- Hospitals. Ducted ventilation where specified.
- Schools. Hall ventilation.
- Shopping malls. Shop extract systems.
- Car parks. Ducted extract.
- Gyms. Fresh air supply.
- Factories. Ducted process extract.
How to choose and install
- Size by airflow and duct pressure.
- Fit flexible connectors at both sides.
- Leave access to the service panel.
- Use a grease-rated fan for kitchen extract.
Why choose Sparks Plumbing Experts
- Fans in several sizesInline duct fans and box fans come in a range of diameters, so you can match airflow to the room.
- PVC and metal optionsChoose corrosion-resistant PVC for humid rooms or metal housings for tougher conditions.
- Grilles and diffusers tooDiffusers, louvers and grilles finish the system you are ventilating.
- Sizing guidanceTell us the room size and duct route, and we help you pick a fan with enough airflow.
- Visit or collect in NairobiOur store is at KCB Building, Enterprise Road, in the Industrial Area, so you can see parts before you buy or collect your order.
- Quotes your wayAsk for prices by phone, WhatsApp, email or the online quote form, whichever suits you on site.
- Over 1,600 products in one placeOur catalogue covers 55 categories, so one supplier can handle most of your parts list.
- Help choosing the right partSend a nameplate photo, a drawing or the old part, and we help you match size and specification.
- Single items or project quantitiesWe price a single replacement part just as readily as a full site order.
- Supply across East AfricaWe serve customers across Kenya, and we also supply buyers in Uganda and Tanzania.
Related products and accessories
Browse more: Ventilation · HVAC · Electricals · Louvers.
Ordering from Sparks Plumbing Experts
We supply customers across Kenya, and we also serve buyers in Uganda and Tanzania. You can collect from our store at KCB Building, Enterprise Road, Nairobi, or ask us about delivery to your site. Send your quantities and specifications, and we will reply with prices and availability.
Request a Quote WhatsApp 0726 086 895
Frequently asked questions
What details do you need to quote centrifugal box fans?
Tell us the space size and use, duct size and length, power supply, or the model you are replacing. A photo of the old part, a nameplate or a drawing also helps. Then call or WhatsApp 0726 086 895, or use the quote form on this page.
Do you deliver centrifugal box fans outside Nairobi?
Yes. We supply customers across Kenya, and we also serve buyers in Uganda and Tanzania. Delivery or courier arrangements are agreed when you confirm the order.
How much does a centrifugal box fan cost in Kenya?
The price depends on the type, size, motor and quantity. Therefore, send your list with a quote request and we will reply with current figures.
Which size do I need?
It depends on airflow and duct resistance. Send your details.
Can it be installed outdoors?
Only weatherproof models. Ask us.
Is it quiet?
The box reduces noise compared with open fans.
Can it handle kitchen grease?
Use grease filters, and clean ducts regularly.
Single or three phase?
Small sizes are often single phase, large sizes three phase.
People also search for
box fan sizes
Common sizes run from 12 to 48 inch.
acoustic box fan
Lined boxes cut fan noise.
kitchen extract box fan
Box fans behind hoods pull air through grease filters.
Centrifugal box fans price in Kenya
Prices change with size, model and quantity. Request a quote from Sparks Plumbing Experts for current figures.
axial vs centrifugal fan
Axial fans move lots of air at low pressure. Centrifugal fans push against ducts and filters.
how to size a ventilation fan
Room volume times air changes per hour gives the airflow. Then allow for duct resistance.
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