The air cleaner started making the strangest sound

There are two portable air cleaners stationed at the front door of the store where I work, however portable air cleaners have been there for the past 3 weeks.

They are supposed to keep all of the buyers and the staff safe, however I’m not sure if they really labor that well; Not that many of afternoons ago, the air cleaner on the right side started to make the strangest sound.

I couldn’t think I was the first lady to notice the peculiar noise. I asked my supervisor if she heard the same noise and she told me that it was genuinely some dust. When the peculiar sound was even louder this morning, I entirely thought the air cleaner was going to stop working. I wanted my boss again although she just shrugged her shoulders. When I came back from breakfast, the ventilation company was servicing the air filtration equipment. My boss told me that the air cleaner stopped working a few minutes after I left for breakfast. She told me that I was right about the noise and that she should have called earlier when I mentioned the issue. She thanked me for bringing it to her attention and told me to keep up the fine work. She told me that is looking for a up-to-date night supervisor starting next month and she has an eye on me for the task. It’s difficult to think that I left for breakfast for 1 third and my life changed. My boss thought I was totally full of baloney this morning, however this day she was singing a unusual tune.

HVAC worker