Mechanical Supplies

Jet fans

About

Induction jet fans, unidirectional and reversible, that move air by momentum transfer instead of by ducting it. Supplied in circular and low-profile rectangular casings with EN 12101-3 high-temperature certification, typically 300 °C or 400 °C for 120 minutes, so the same units serve the smoke case.

Application

Replace the extract ductwork in car parks: main extract and supply fans sit at the ends of the level and jet fans push the air across the slab, freeing the soffit and buying back headroom on every floor. The same array serves double duty, daily CO/CO₂-controlled ventilation and, on a fire signal, smoke clearance under a CFD-verified control strategy that has to be modelled for the actual geometry, not adopted from another project.

Standards & Reference 6 cited

EN 12101-3
Powered smoke and heat exhaust ventilators: the fans that must keep running in hot smoke.
AMCA 210
The laboratory method for testing fan aerodynamic performance: airflow, pressure, power and efficiency. A fan curve that is not tested to this is not comparable with one that is.
AMCA 300
The reverberant room method for measuring the sound a fan emits. The source of the sound power figures used in an acoustic calculation.
ISO 5801
The international method for testing industrial fan performance using standardised airways. It is the ISO counterpart to AMCA 210.