Cabinet cooling is not just about picking a fan and installing it. You need a 5-step systematic design: calculate airflow → define airflow path → choose filtration → verify power & control → measure temperature rise. Choose wrong and you get either overheating tripping, excessive noise, or dust-induced short circuits. Browse more products: cabinet filter fan product list.
Step 1: Calculate Required Airflow
Estimate based on cabinet heat load: Required airflow (m³/h) ≈ Heat load (W) × 3.1 / Allowable temperature rise (°C)
| Cabinet Heat Load | ΔT = 10°C | ΔT = 15°C |
|---|---|---|
| 500W | 155 m³/h | 103 m³/h |
| 1000W | 310 m³/h | 207 m³/h |
| 2000W | 620 m³/h | 413 m³/h |
| 3000W | 930 m³/h | 620 m³/h |
Step 2: Define Airflow Path
We recommend "bottom-in, top-out" or "side-in, side-out" to avoid short-circuit (exhausted hot air being sucked back in). When there are heat-generating components inside the cabinet, the fan outlet should face the hottest area.
Step 3: Choose Filtration Solution
When workshop dust is high, we recommend using filter fans or a maintainable filter structure on the intake side. Filter media adds resistance, so you must account for static pressure and future dust loading when selecting.
Step 4: Verify Power & Control
AC fans work with direct AC power supply. DC fans are easier to integrate into 24V/48V control systems. EC products are for applications requiring speed control and high efficiency.
Step 5: Full Cabinet Temperature Verification
Finally, validate the design with a full-cabinet temperature rise test. Catalog fan parameters are only a starting point; real system performance also depends on cutout area, louver structure, wiring harness, component layout, and filter condition.
Not sure how to calculate? Send us your cabinet dimensions, heat load list, and ambient temperature — we'll provide a free cooling solution. Or contact us for selection support.
Frequently Asked Questions
How much margin should I leave for cabinet cooling?
We recommend selecting a fan with 1.2-1.5x the calculated airflow. As the filter loads with dust, resistance increases and airflow drops — margin ensures long-term performance.
Is top-in top-out okay?
Not recommended. Top-in top-out easily creates hot air short-circuit: cold air exhausts before properly flowing over heat-generating components. Bottom-in top-out or side-in side-out is much better.
Can I skip the filter?
In clean environments (offices, server rooms), you can skip it. But in workshops or outdoor, you must add a filter — otherwise dust builds up inside the cabinet in 3 months and may cause short circuits.
Is one fan enough?
For small cabinets (<600mm tall), one fan may be enough. For larger cabinets, we recommend one intake and one exhaust fan to create cross-flow for better cooling.
Can JIEFENGFAN provide a complete cooling solution?
Yes. Send us your cabinet dimensions, heat load, and ambient temperature — we'll deliver a solution within 1 business day, including fan model, quantity, mounting position, and filter configuration.