Guide
How to Size an Enclosure Cooling Fan
Start with heat load, ambient temperature, target internal temperature and airflow path before choosing fan size.
Use the guide to prepare inputs for selection and RFQ work. Confirm project assumptions before final model selection.
Decision steps
- Estimate heat load
- Set target cabinet temperature
- Check ambient temperature
- Choose airflow route
- Confirm filter and pressure assumptions
Use this guide with
Common mistakes this prevents
choosing by fan size onlyignoring filter pressure lossmissing target internal temperatureforgetting outlet airflow path
RFQ summary this should produce
estimated heat loadambient and target temperaturepreferred airflow routefilter needvoltage and mounting position
Related paths
Control Cabinet CoolingCabinet Cooling Fan SelectorFan Filter vs Axial Fan vs Top-Mounted Fan
Choose the next step
Move from reading to action based on what information you already have.
I need help choosing
Use a selection path when cabinet size, heat, humidity, voltage, cutout or control logic still needs to be organized.
conditionsselectoropen questions
I have an old model
Use the replacement path when you have labels, photos, cutout measurements or an existing cabinet component to match.
old labelphotocutout
I am ready to request a quote
Send cabinet conditions, product family, quantity, files and document requirements for a supplier response.
RFQquantitydocuments