If your neighbor's radon fan is noisy and is causing a disturbance, there are a few steps you can take:
Talk to your neighbor: The first step is to talk to your neighbor about the noise issue. Explain how the noise is affecting you and ask if there is anything they can do to reduce the noise level. They may be willing to install a quieter fan or relocate the fan to a different location.
Check local noise ordinances: Check your local noise ordinances to see if there are any regulations regarding noise levels. If the noise level exceeds the limit, you may be able to file a complaint with your local authorities.
Contact a radon mitigation professional: If the noise is due to a malfunctioning fan or an improperly installed system, it may be necessary for a radon mitigation professional to inspect the system and make repairs.
Install soundproofing: If the noise cannot be resolved through other means, you may need to install soundproofing in your home to reduce the impact of the noise.
It's important to approach the issue with your neighbor in a respectful and friendly manner. By working together, you may be able to find a solution that works for both of you.