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Top Reasons Your Heater Sounds Loud When Turned On and How to Fix It

10/02/2025 | Hawkrown

The warm-air bath heater is a common installation in many families' bathrooms. It is convenient and energy-efficient, but during use, it may produce a loud humming noise. Let’s take a look at why this happens!

Why does the warm-air bath heater make a humming noise when turned on?

When the warm-air heater is activated, it needs to preheat, and the noise may be caused by vibrations from the blower fan starting up. You can try turning it on and off a few times to check. If the humming noise is not loud, it is considered normal. However, if the sound is quite loud, it could indicate that some internal components of the heater are damaged and need to be checked and repaired promptly.

Types of bath heaters

1. Infrared Bath Heater

Advantages:

Heats up quickly, providing immediate warmth, making it very convenient.

Energy-efficient, with each bulb consuming about 250W, resulting in low overall energy consumption.

Disadvantages:

Limited heating range; warmth is only available directly under the heater, meaning it may not effectively warm larger bathrooms.

High brightness can be unsuitable for children, as the strong light may strain their eyes and affect their visual development.

2. Warm-Air Bath Heater

Advantages:

Emits heated air, effectively warming the entire bathroom.

In addition to heating, it can also provide cool air, making it usable in summer as well.

Unlike infrared heaters, it is not limited by ceiling height.

Disadvantages:

Should not be installed directly above the shower area, as even though it blows warm air, the air can feel cool when showering.

Takes longer to heat up and has a higher power consumption compared to infrared heaters.

Over time, the heating efficiency may decrease, potentially requiring replacement after a few years of use.

3. Carbon Fiber Bath Heater

Advantages:

Heats up quickly and also offers some health benefits.

Disadvantages:

The technology for carbon fiber heaters is relatively new, so it may not yet be fully mature.

In summary:the above points provide insights into different types of bath heaters. Each type has its own advantages and disadvantages, and their heating effects can vary. If you want better heating solutions for your home, you might consider installing underfloor heating. If budget is a concern, alternatives like warm-air machines or electric heaters can be used instead.

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