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Smoke exhaust fans

Wolter fans for smoke control systems, tested to the European standard EN 12101-3 for operation at 300 °C or 400 °C for 120 minutes.

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The smoke exhaust fan is the main working component of a smoke control system. In a fire it must start on a signal from the controls and run for a defined time while moving hot gases. That is why these fans undergo fire testing, and their motor, bearings, impeller, casing and electrical connection are designed for high temperature. They are also called smoke extract fans, smoke control fans or smoke and heat exhaust fans; the tests and classes are set by the European standard EN 12101-3.

Wolter offers smoke exhaust fans for every main scheme:

Series rated F300/F400

Wolter · JFUO / JFRO

JFUO / JFRO — low-height jet fans

Axial jet fan in a low oval casing, 343–415 mm high; uni-directional (U) or reversible (R).

Thrust: 24–68 NAirflow: 2,448–9,504 m³/hTemperature rating: F300 (300 °C, 120 min), F400 (400 °C, 120 min)Sizes: 300, 370; casing L — 2,250 mm, S — 1,200 mm
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Wolter · JFUC / JFRC

JFUC / JFRC — round jet fans

Axial jet fan in a 1,800 mm round casing with silencer: thrust up to 85 N, reversible version available.

Thrust: 15–85 NAirflow: 1,800–11,016 m³/hTemperature rating: F300 (300 °C, 120 min), F400 (400 °C, 120 min)Sizes: 280, 315, 355, 400; length 1,800 mm, casing diameter 400–506 mm
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Wolter · JFC

JFC — low-height centrifugal jet fans

Jet fan with a centrifugal impeller and nozzle: from 221 mm high, thrust up to 104 N, adjustable deflector.

Thrust: 31–104 NAirflow: 2,664–10,656 m³/hTemperature rating: F300 (300 °C, 120 min); F400 on requestSizes: Thrust classes 30, 50, 60, 80, 100 N; height 221–325 mm; length 1,008–1,551 mm
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Wolter · AXV / BXV

AXV / BXV — axial fans, including smoke exhaust

Axial fan with an IEC motor: Ø 315–1600 mm, up to 200,000 m³/h and 1,500 Pa, adjustable-pitch blades, F300/F400 versions.

Airflow: 1,000–200,000 m³/hPressure: up to 1,500 PaTemperature rating: F300 (300 °C, 60/120 min), F400 (400 °C, ≥ 120 min)Sizes: Ø 315–1600 mm
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Wolter · AXG

AXG — two-stage axial fans

Two counter-rotating stages with separate motors: redundancy, high pressure and economical part-load operation.

Temperature rating: −40…+40 °C; F300/F400 on requestSizes: 315–1600
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Wolter · RVHT

RVHT — roof smoke exhaust fans

Roof fan for smoke exhaust through the roof: motor outside the airstream, 400 °C for 120 minutes, sizes 355–710.

Temperature rating: 400 °C, 120 minSizes: 355–710
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Wolter · Tunnel Jet Fans

Tunnel jet fans

Uni-directional and reversible jet fans for longitudinal tunnel ventilation; EN 12101-3, up to 400 °C / 120 min.

Temperature rating: up to 400 °C, 120 min
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Wolter · Tunnel Portal Fans

Axial tunnel and portal fans

Large axial fans for tunnel and metro portals and shafts: sizes up to 2800, rated up to F400, stainless steel versions.

Temperature rating: up to F400 (400 °C, 120 min)Sizes: up to 2800
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SeriesTypeAirflow, m³/hPressure, PaTemperature rating
JFUO / JFROlow-height axial jet fan2,448–9,504—F300 (300 °C, 120 min), F400 (400 °C, 120 min)
JFUC / JFRCround axial jet fan1,800–11,016—F300 (300 °C, 120 min), F400 (400 °C, 120 min)
JFClow-height centrifugal jet fan2,664–10,656—F300 (300 °C, 120 min); F400 on request
AXV / BXVaxial fan, F300/F400 versions1,000–200,000≤ 1,500F300 (300 °C, 60/120 min), F400 (400 °C, ≥ 120 min)
AXGtwo-stage counter-rotating axial fan——−40…+40 °C; F300/F400 on request
RVHTroof smoke exhaust fan, 400 °C——400 °C, 120 min
Tunnel Jet Fanstunnel jet fan——up to 400 °C, 120 min
Tunnel Portal Fansaxial portal and shaft fan——up to F400 (400 °C, 120 min)

EN 12101-3 classes

EN 12101-3 classifies smoke exhaust fans by temperature and operating time. Wolter equipment uses two classes:

ClassTemperatureOperating timeTypical use
F300300 °C120 minCar parks and rooms with moderate design gas temperature
F400400 °C120 minUnderground car parks, tunnels, higher-risk buildings

The required class is set by the local codes and the fire protection design. AXV axial fans are also available in class F300 for 60 minutes.

Centrifugal and portable smoke-exhaust fans

Among centrifugal fans, the JFC car park jet fan carries a fire rating (F300, F400 on request). Wolter also makes portable smoke-freeing fans for fire brigades; the manufacturer does not publish models or data, so we select them on request.

What to check when selecting

  1. Operating modes. Many fans run in two modes: daily ventilation and smoke exhaust. Two-speed motors save energy in normal operation.
  2. Location. A fan inside the served zone faces harsher conditions than one in a separate plant room.
  3. Power supply. Fire-rated cabling and a reliable supply are required. The isolator switch must match the temperature class.
  4. Frequency inverter. For F300/F400 fans the motor protections and the inverter are bypassed in fire mode, as the manufacturer requires. The control scheme must allow for this.
  5. Reversal. If the smoke direction depends on the fire location, choose reversible versions.

Documents

For smoke exhaust fans we provide technical data, EN 12101-3 test information and the conformity documents required in the country of delivery. We confirm the list for each item at selection.

FAQ

Frequently asked questions

Which smoke exhaust fan suits an underground car park?

Usually jet fans combined with axial exhaust fans rated F300 or F400. The series and sizes come from the calculation.

Can a smoke exhaust fan run on a frequency inverter?

Yes, in daily operation. In fire mode the inverter and protections are bypassed as the manufacturer specifies.

Are there roof-mounted smoke exhaust fans?

Yes, RVHT roof fans are rated for 400 °C for 120 minutes.

What do F300 and F400 mean?

They are EN 12101-3 classes for smoke exhaust fans: F300 means operation at 300 °C and F400 at 400 °C for a defined time. Wolter fans are rated for 120 minutes; AXV axial fans are also available in class F300 for 60 minutes.

Need equipment selection or a system design?

Send us the layouts or the brief — we will prepare a selection, a calculation and a quotation.

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