Bus and Vehicle HVAC Fans
Bus, coach and vehicle air conditioners work in a tough place: vibration, road spray, dust, engine heat and supply voltages that move with the alternator. The condenser fans on the roof or rear unit reject heat, and the evaporator blowers push cooled air through the cabin ducts. Brushless DC fans running on the vehicle’s 12 V or 24 V system give long life and speed control without brush wear.
LONGWELL manufactures brushless DC condenser fans and DC blowers for bus and coach air conditioners, truck and engineering-vehicle cabs, and special vehicles.
Where these fans are used
- City buses, coaches and school buses: roof-mounted and rear AC units
- Truck, tractor and construction-machine cabs
- Special vehicles and rail vehicles, after duty-point review
- Electric bus battery and electronics cooling circuits
What to specify
1. Voltage and current
12 V or 24 V system; maximum current per fan matters for wiring and fuse sizing.
2. Blowing or suction
Condenser fans are built as blowing or suction versions depending on whether they push air through the coil or pull it.
3. Airflow at coil resistance
Specify the airflow needed at the condenser’s pressure drop, and the fan diameter that fits the unit.
4. Environment and protection
Roof units see rain, wash-down and dust. Look for high ingress protection and a wide temperature range.
5. Electrical protection and control
Soft start, current limiting, stall protection and under-/over-voltage shutdown protect the fan and the vehicle electrics. PWM or analogue speed input lets the AC controller adjust fan speed.
LONGWELL condenser fans
| Model | Diameter | Airflow at 100 Pa | Voltage / current | Type |
|---|---|---|---|---|
| LWCC-DC190L/M | 190 mm | 400 m³/h | 12 V ≤6 A / 24 V ≤3 A | Blowing or suction |
| LWCC-DC316 (suction) | 316 mm | 2,400 m³/h | 12 V ≤18 A / 24 V ≤9 A | Suction |
| LWCC-DC316 (blowing) | 316 mm | 1,400 m³/h | 12 V ≤13 A / 24 V ≤6.5 A | Blowing |
Also 300, 305 and 350 mm and 12/14 in brushless condenser fans. PA66 7-blade impeller, IP68, insulation class F, operating range -40 to 85 °C, with soft start, current limiting, stall protection and under-/over-voltage shutdown. Values from LONGWELL product data.
DC evaporator and cab blowers
LWFD DC forward-curved blowers in 120, 133, 146 and 197 mm, 24 V or 48 V DC with 0–10 V or PWM speed control, for evaporator and cab air circulation. Compact DC axial fans (12 / 24 V) cool vehicle electronics.
Browse: condenser cooling fans · DC forward-curved blowers · Download: automotive / bus condenser fan catalogue
Related: traction converter cooling · transportation and rail equipment
Replacement fans
Yes. LONGWELL can provide replacement candidates for many mainstream bus and vehicle condenser fans and blowers. Send the diameter, voltage, blowing/suction direction, connector and mounting; the final model is confirmed by duty point, mounting and a vehicle test.
What to include in your enquiry
- Vehicle and AC unit type; condenser or evaporator position
- 12 V or 24 V; current limit
- Diameter, blowing or suction, airflow needed
- Connector, mounting and control signal
- Annual quantity
Ask about bus and vehicle HVAC fans →
FAQ
What is a bus condenser fan?
An axial fan on the bus air-conditioning unit that moves outside air across the condenser coil to reject the heat removed from the cabin.
Why use brushless condenser fans?
Brushless motors have no brushes to wear, run longer between replacements and allow electronic speed control and protection functions.
Do you offer 24 V condenser fans?
Yes. LWCC models are available in 12 V and 24 V versions, as blowing or suction types.
Are the fans waterproof?
The listed LONGWELL brushless condenser fans are rated IP68. Confirm the rating for the exact model and installation.