The CasaFan EQ EQ 20/4 M is a robust axial wall-mounted fan featuring a square wall plate, designed for commercial and industrial applications. Constructed from powder-coated, corrosion-protected sheet steel and powered by a ball-bearing external rotor motor, it delivers high air volume directly through walls to the outdoors or adjacent building spaces.
Technical Features & Construction
Industrial Design
Square wall plate made of galvanized sheet steel with an additional protective coating/powder coating for long-lasting corrosion protection in professional environments.
Speed-Controllable
The motor output can be adjusted using suitable speed controllers or step transformers (not included in delivery).
Ball-Bearing Motor
External rotor motor with enclosed ball bearings, Insulation Class F, and thermal overload protection for high reliability. Reversible operation possible (except EQ 20/4 M and EQ 25/4 M).
Which Applications Is the CasaFan EQ Series Suitable For?
Thanks to its shallow installation depth combined with high airflow capacity, the CasaFan EQ series is ideal for:
- Workshops & Warehouses: Reliable extract ventilation and continuous air circulation.
- Commercial & Production Areas: Direct extraction of stale air, moisture, or process heat to the outside.
- Catering Service Areas & Utility Rooms: Demand-based supply and exhaust ventilation through exterior walls.
Detailed Technical Specifications (Model EQ EQ 20/4 M)
Binding performance data according to CasaFan manufacturer specifications:
| Parameter |
Value |
| Model Designation | CasaFan EQ EQ 20/4 M |
| Fan Type | Axial wall-mounted fan with wall plate |
| Voltage / Frequency | 230 V / 50 Hz |
| Power Consumption | 40 watts |
| Current Consumption | 0.3 A |
| Nominal Speed | 1400 RPM |
| Speed Steps | 1 step (externally continuously variable or multi-stage controllable) |
| Max. Airflow | 500 m³/h |
| Maximum Pressure (Pmax) | 80 Pa |
| Sound Pressure Level (Lp) | 45 dB(A) |
| IP Code / Protection Class | IP44 / I |
| Airflow Temperature Range | −25 °C to 55 °C |
| Motor Type | AC external rotor motor with ball bearings (Insulation Class F) |
| Motor Protection | Integrated thermal overload protection |
| Reversible | Yes (direction of rotation reversible; except EQ 20/4 M / EQ 25/4 M) |
| Housing / Wall Plate | Galvanized sheet steel, powder-coated, color black |
| Construction Type | Axial wall-mounted fan with wall plate |
Accessories & Installation Note
Controls & Cold Air Protection: Delivered without a speed controller. Depending on the motor type (230 V single-phase AC or 400 V three-phase AC), a suitable CasaFan controller or step transformer is required to adjust airflow rate. To prevent backdrafts and heat loss during winter when the fan is idle, installation of a matching exterior shutter (e.g., CasaFan HKS / MVK / VKS in the corresponding size) is recommended.
Frequently Asked Questions about the CasaFan EQ Series (FAQ)
Important Electrical & Connection Notice (T Models)
Models in the T series are three-phase AC fans (400 V / 50/60 Hz). A suitable three-phase power supply is required for operation; the unit does not feature a standard 230 V safety plug. Hardwired electrical installation must strictly be performed by a qualified electrician.
Overview of CasaFan EQ Model Variants
The table below provides a direct comparison of all versions in the EQ series:
| Model |
Voltage |
Nominal Size |
Speed |
Type / Pole Count |
| EQ 20/2 M | 230 V ~ 50 Hz | 200 mm | 2,650 RPM | 2-pole |
| EQ 20/4 M | 230 V ~ 50 Hz | 200 mm | 1,400 RPM | 4-pole |
| EQ 25/4 M | 230 V ~ 50 Hz | 250 mm | 1,400 RPM | 4-pole |
| EQ 30/4 M | 230 V ~ 50 Hz | 300 mm | 1,400 RPM | 4-pole |
| EQ 35/4 M | 230 V ~ 50 Hz | 350 mm | 1,400 RPM | 4-pole |
| EQ 40/4 M | 230 V ~ 50 Hz | 400 mm | 1,400 RPM | 4-pole |
| EQ 20/4 T | 230 / 400 V ~ 50 Hz | 200 mm | 1,400 RPM | 4-pole |
| EQ 25/4 T | 230 / 400 V ~ 50 Hz | 250 mm | 1,400 RPM | 4-pole |
| EQ 30/4 T | 230 / 400 V ~ 50 Hz | 300 mm | 1,400 RPM | 4-pole |
| EQ 35/4 T | 230 / 400 V ~ 50 Hz | 350 mm | 1,400 RPM | 4-pole |
| EQ 40/4 T | 230 / 400 V ~ 50 Hz | 400 mm | 1,400 RPM | 4-pole |
| EQ 50/4 T | 230 / 400 V ~ 50 Hz | 500 mm | 1,400 RPM | 4-pole |
How Is the Model Name Structured? (CasaFan Nomenclarture)
The product designation for CasaFan wall-mounted fans follows a systematic layout:
- EQ: Model range of square axial wall-mounted fans with wall plate (sheet steel).
- Number after the slash (e.g., 2 or 4): Motor pole count (2-pole for high pressure; 4-pole = approx. 1,400 RPM for quieter operation).
- Letter at the end (M or T):
- M = Single-phase alternating current / AC (230 V / 50 Hz)
- T = Three-phase alternating current / AC (400 V / 50 Hz)
- Model
- EQ 20/4 M
- Air output
- 500 m³/h
- Temperature max.
- 55 °C
- Sound pressure
- 45 dB(A)
- IP protection class
- IP44
- Voltage
- 230 V / 50 Hz
- Air Pressure
- 80 Pa
- Power
- 40 watts
- Amperage
- 0.3 A
- Revolutions
- 1400 RPM
- Protection class
- I
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