Car-Park Jet Fans
Product overview
RAFAVENT IMPULSE VENTILATION SUBFAMILY
Compact axial impulse fans for directing air through enclosed car parks. Selection is based primarily on required thrust, discharge velocity, layout and CFD coordination—not on static pressure duty.
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Nominal thrust is estimated from air density, outlet flow and effective jet velocity. Installed effective thrust is lower when the jet attaches to ceilings, beams or nearby obstacles.
Low speed supports routine pollution control and high speed supports purge duty. VFD control may be used where the selected motor and control philosophy permit it.
Jet fans move and entrain air toward extract points; main supply and extract fans overcome the system resistance. Final quantity and orientation require layout or CFD review.
Electrical basis: 400 V, 50 Hz, three-phase, two-speed or VFD-compatible motor subject to final motor selection. Standard casing is coated or galvanised steel with mounting brackets, protective guards and external terminal box. Silencers are selected separately where the project sound limit requires them.
These tables are not pressure–airflow curves. They show six preliminary points at 0%, 25%, 50%, 75%, 90% and 100% speed. Airflow is calculated proportional to speed and nominal thrust proportional to speed squared; displayed thrust is rounded to the nearest newton. Absorbed power changes approximately with the cube of speed.
Maintain clear inlet and discharge zones and avoid directing the jet immediately into beams, signs, cable trays, columns or walls.
Effective installed thrust must be corrected for ceiling proximity, inlet blockage, silencers, deflectors and local cross-flow.
Sound values are preliminary free-field estimates at 3 m and exclude reflections and structure-borne vibration.
Routine ventilation data must not be used as proof of emergency smoke performance.
No F300/F400 temperature class or EN 12101-3 claim applies unless the complete supplied model has valid configuration-specific certification.
Final system design must define pollution-control rates, extract capacity, fan layout, fire strategy, controls, power supplies and CFD acceptance criteria.