Ceiling Fans Sorted by Diameter

Obstacles

Please keep in mind that separating walls, free-standing book shelves, suspended ceilings, etc. impact air circulation in the room. In industrial environments this can be due to tall storage racks and shelving units. In these cases consult a professional engineer specialised in ventilation for compatibility with lower hanging fans. If the fans cannot be mounted to the ceiling itself, we also offer a variety of wall-mounted units. Check out our category for with the smallest fan diameter. Some of these models can be mounted to the wall and provide quite a powerful airflow. However, those units are mostly used in domestic areas. For industrial facilities we recommend special wall and centrifugal fans.

Big and elongated rooms

A ceiling fan has a circular sphere of action that is most powerful directly underneath the fan when it is set to summer mode. In big rooms it might be wise to put up more than one ceiling fan. This ensures that every single corner is ventilated well. Starting from a room surface of about 38m2 several small fans are more efficient than a single big appliance. The devices can also be synchronised, furthermore DC motor options guarantee a low energy consumption.

Not every room has a square layout or matches any of the values given in the overview. Elongated and narrow rooms are preferably divided into small squares. The same goes for large factory buildings that are used for storage or production.

One sample calculation is available in our guide about the "ideal size of a ceiling fan".

Intermediate sizes

What should you do if your room size is right between two fan size categories? If you have to decide between two diameters, opt for the bigger one. The reason for this is that you cannot increase a motor’s performance but you can always decrease it. If you choose the smaller size it might not be enough to provide sufficient circulation. A bigger fan still gives you the possibility to run the motor on a lower speed. There are even dimmer modules and transformers that add even more speed levels to the fan. This prevents any unpleasant draught when mounting a big fan in a small room.

Large fans are usually equipped with more powerful motors. They need less rotations per minute to create the same airflow as a small fan. The frequency of the rotation impacts the noise level as well. If you are sensitive to background noise, opt for a fan with an energy-saving DC motor instead. Not only do they consume less power, but also operate virtually soundless no matter the blade size.

Make sure to adhere to the maximum recommended surface area of 38m2 for one fan. If the room is bigger, use several fans to create even air circulation. You can use one wall speed controller to operate all fans at once.

What to look out for during installation

• Safety distance
• Carrying capacity of the ceiling or beam
• If applicable, compatibility with sloping ceilings
• If applicable, IP ratings

In our range we include a variety of ceiling fans ranging from 45cm to 300cm in size. We offer small units with lights for even the smallest of spaces. The minimum clearance to the wall or furniture should be at least 6cm or the specifications given in the user manual. Make sure to consider this additional measurement when choosing a ceiling fan size.

Wide, protruding ceiling fans make a real impression and are a great choice for hotel lobbies, conference rooms and representative foyers. Some models have a slow motion speed level that acts as a “visual“ mode rather than providing air circulation. It moves only little air but creates a wonderful atmosphere. If a large ceiling fan is not suitable for your room size you can always opt for several smaller ones as well to create the same effect.

You found the right fan size, but the overall depth of the appliance is too big for your low ceiling? Our super slim ceiling fans (hugger mount) are available in a variety of widths, too.