How to Choose the Right Wire Size for Your Warm Wind Bathroom Heater

When installing a heating fan for the bathroom, it is important to pay attention to the thickness of the electrical wire. So, what size wire should be used for a heating fan? Let's take a look.

What size wire is used for a heating fan

The power of the heating fan is generally around 1100W, which requires a 2.5 square millimeter copper wire. If multiple units are being installed, a 4 square millimeter copper wire may be chosen. Additionally, due to the installation location, the power supply wire connecting to the heating fan needs to be waterproof. This is crucial as using it in a damp bathroom can be very dangerous and may lead to electric shock.

Furthermore, the copper wire should be run through conduits and hidden within the walls. No exposed wires should be present in the bathroom, and even the power switch for the heating fan should be properly waterproofed.

The heating fan can be installed in the center of the bathroom to avoid mounting it directly above the shower. Water vapor entering the unit can pose significant safety risks, as the heating fan relies on infrared radiation to warm the space. Over time, excessive moisture can affect its performance, and showering without clothing can lead to burns on the skin. Therefore, positioning the heater in the center ensures safety and allows heat to radiate evenly to all corners of the bathroom.

How to choose a heating fan

1. Choose based on installation type

There are wall-mounted and embedded installation options. Wall-mounted units are hung on walls, taking up less space and offering easy installation. They are also typically lower in power, making them suitable for smaller bathrooms. Embedded units are installed in the ceiling, often as part of an integrated module, providing aesthetic appeal and even airflow.

2. Choose based on bathroom size

When selecting a heating fan, pay attention to the size of your bathroom. If the bathroom is large, it may be necessary to choose multiple heating fans to avoid uneven heating. For bathrooms smaller than 4 square meters, a wall-mounted heating fan can directly blow warm air to the required area.

In summary：by now, you should have a better understanding of what size wire is needed for a heating fan. If you wish to learn more related knowledge, feel free to follow our website!