Ventilation Fans
Ventilation fans move fresh, exhaust, or smoke-extraction air through a building's duct system or directly between spaces, sized by airflow volume and static pressure rather than temperature control. NLS sources axial, centrifugal, and jet fans for car park ventilation, kitchen exhaust, smoke extraction, and general building ventilation across Saudi commercial and industrial projects.
Ventilation fans handle the airflow jobs an air handling unit isn't built for: moving air in and out of a space without conditioning it, or moving smoke and heat away from a fire zone under emergency conditions. Axial fans push air along the axis of the impeller and suit duct-mounted or wall-mounted applications with relatively low static pressure, like general exhaust or supply ventilation. Centrifugal fans use a scroll casing to build higher static pressure, needed where air travels through longer duct runs, multiple bends, or filter banks. Jet fans, mounted directly in a car park ceiling without connecting ductwork, push air along the length of a parking level toward extract points, which avoids the ductwork cost and headroom loss a fully ducted car park ventilation system would need.
Smoke extraction and car park ventilation are the two applications where Saudi civil defense and building code requirements drive fan selection most directly. A smoke extraction fan for a car park, stairwell, or corridor has to run at rated temperature for a specified duration under fire conditions, commonly tested to 300°C for two hours or a higher F400 rating depending on the application and the civil defense authority's requirement, which is a materially different specification from a standard exhaust fan built only for ambient-temperature continuous duty. Getting this distinction right on a fan schedule matters because a standard fan substituted for a rated smoke fan fails the specification outright rather than merely underperforming it.
Kitchen exhaust ventilation for hotel and hospital food service areas carries its own requirements around grease-rated ductwork and fan construction, since a standard fan isn't rated for continuous grease-laden air exposure. General building ventilation, covering toilet exhaust, plant room ventilation, and fresh air supply to occupied spaces without a full AHU, typically uses standard-duty axial or centrifugal fans sized to the code-minimum air change rate for that room type.
Sourcing runs from a fan schedule listing airflow, static pressure, and any fire rating requirement per fan tag. A project's mechanical consultant issues this schedule, and NLS returns fan selection matched to the civil defense or code requirement where one applies, with a priced quote in USD and lead time set by whether the fan is a standard-duty unit or a fire-rated smoke extraction fan, which typically carries a longer lead time given its certification testing.
Specifications
- ✓Types: axial, centrifugal, and jet (impulse) fans for ducted or ductless car park applications
- ✓Smoke extraction fans rated to withstand elevated temperature (commonly 300°C/2hr or F400 class) per civil defense requirement
- ✓Kitchen exhaust fans rated for continuous grease-laden air exposure
- ✓Sizing basis: airflow volume (m³/hr) and system static pressure, not temperature control
- ✓General ventilation fans sized to code-minimum air change rate for the room type
- ✓Standards referenced: applicable civil defense fire-rating test standards and IEC electrical motor ratings
Frequently Asked Questions
Who supplies smoke extraction fans in Saudi Arabia?+
NLS sources smoke extraction fans rated to the temperature and duration civil defense requirements specify, alongside standard axial and centrifugal ventilation fans, for car park, stairwell, and general building applications.
What's the difference between a jet fan and a ducted ventilation fan?+
A jet fan mounts directly in a ceiling, typically a car park, and pushes air along the space toward extract points without connecting ductwork. A ducted fan connects to a duct network carrying air to and from specific grilles, needed where airflow has to be directed to particular rooms or zones.
What lead time should I expect for fire-rated smoke extraction fans in KSA?+
Fire-rated smoke extraction fans typically carry a longer lead time than standard ventilation fans given the certification testing behind their temperature rating. NLS confirms the actual figure once the fan schedule and required rating are set.