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Choosing the Right Wire Size for a 2500W Bathroom Heater

10/02/2025 | Hawkrown

To ensure that the bathroom heater operates normally, it is generally necessary to use the appropriate wire specifications for the connections. So, what size wire is needed for a 2500W bathroom heater? Let's learn more about it together.

What size wire is needed for a 2500W bathroom heater?

Typically, if the power of the bathroom heater is 2500W, a 4mm2 wire should be used. Generally, for the live wire, a 4mm2 wire is recommended, while other connections can use a 2.5mm2 wire. It is best to use copper core wire for the connections.

What aspects should be paid attention to when installing a bathroom heater?

1. Ventilation hole position

The ventilation hole is an important component of the bathroom heater. If there is no ventilation hole, the internal air will not be able to flow outside. Therefore, when installing, it is essential to clearly determine the position of the ventilation hole on the wall. This position should preferably be on the ceiling but slightly lower than the air outlet to effectively reverse the flow of water in the house’s ventilation duct.

2. Install the duct

One end of the ventilation duct should be connected to the ventilation window, while the other end should extend from the wall and connect to the external wall outlet. Additionally, the gaps between the duct and the ventilation outlet should be sealed with cement to prevent outdoor rainwater from entering the duct.

3. Position of the bathroom heater

Next, it is necessary to determine the exact position for the bathroom heater. Generally, the distance between the heater and the floor should be maintained between 2.1 meters to 2.2 meters. Furthermore, when installing the bathroom heater, ensure that its light can focus on the user's back to prevent them from getting cold while bathing.

4. Wiring

After the heater is installed, it is important to carry out the wiring correctly. When wiring, first remove the heater's light bulbs, then take off the heater cover and spring. Follow the proper wiring rules for the connections. After wiring is complete, replace the cover and finally tuck away any excess wire inside the ceiling.

In summary:the above is a detailed introduction to the wire size needed for a 2500W bathroom heater and the aspects to consider during installation. We hope this information is helpful. For more related knowledge, please continue to follow our website.

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