What Do F300 and F400 Mean for Smoke Exhaust Fans?
F300 and F400 are classifications used to describe a smoke exhaust fan’s ability to operate under elevated fire-temperature conditions for a defined period. The required class should be evaluated against the project fire scenario and specification.
What do F300 and F400 indicate?
These classifications describe performance at a specified temperature for a specified duration. They are used when assessing whether a fan is suitable for the thermal conditions expected during a fire scenario.
Why is this different from normal operating temperature?
A smoke exhaust fan may run at much lower temperatures during normal ventilation. In a fire event, however, it may need to continue extracting hot smoke, so emergency performance is considered separately.
Which documentation should be checked?
A model name alone is not enough. The manufacturer’s relevant test and conformity documentation should be checked together with the project specification and required performance class.
Should F300 or F400 be selected?
Choosing the higher temperature class by default is not the right approach. The required class depends on the design fire temperature, operating duration and the technical requirements of the project.
Vitlo smoke-control solutions
The AXF smoke exhaust fan and AXJ, RXJ and TUNNEL-AXF jet fan solutions can be evaluated for different smoke-control scenarios. Final selection should follow project performance data.