What's this box in the bathroom
There's this box in the bathroom wall and I notice it has been making a bigger humming noise for the past one week. What does this do, and is the humming noise normal? I live in an apartment if that makes a difference.
There's this box in the bathroom wall and I notice it has been making a bigger humming noise for the past one week. What does this do, and is the humming noise normal? I live in an apartment if that makes a difference.