Purpose
JFC is the choice when headroom is too low for an axial jet fan, or where beams, services and low driveways are frequent. The centrifugal impeller with its nozzle produces a flat, directed jet from a very shallow casing.
Design
The backward-curved impeller is welded from aluminium and balanced to G2.5. The integrated nozzle shapes the jet, and the adjustable outlet deflector directs it downwards — under beams — or along the slab. The two-speed 1,440/720 rpm motor gives a quiet ventilation mode and full thrust for smoke clearance.
When to choose JFC
- free height under the slab is less than axial models need;
- the flow must be pushed under many downstand beams;
- high thrust (up to 104 N) is needed at minimum height.
Where height allows, the axial JFUO / JFRO and JFUC / JFRC also offer flow reversal.
Technical data
| Thrust | 31–104 N |
|---|---|
| Airflow | 2,664–10,656 m³/h |
| Temperature rating | F300 (300 °C, 120 min); F400 on request |
| Sizes | Thrust classes 30, 50, 60, 80, 100 N; height 221–325 mm; length 1,008–1,551 mm |
| Motor | Two-speed, 1,440 / 720 rpm; 0.92/0.23 to 3.22/0.8 kW |
| Materials | Casing — galvanised steel; impeller — welded aluminium, backward-curved blades, balanced to G2.5 |
| Mounting | Under the slab; inlet guard and ceiling brackets included |
| Thrust | 31/7.7 N (JFC 30) to 104/26 N (JFC 100), high/low speed |
| Sound pressure level | 55–76 dB(A) at 3 m, 45° |
| Weight | 67–129 kg |
| Flow direction | Uni-directional |
Versions
- JFC 30, JFC 50, JFC 60, JFC 80, JFC 100 — by nominal thrust in newtons
Accessories
- Inlet guard (included)
- Ceiling brackets (included)
- Adjustable outlet deflector
- Isolator switch
