The museum has lots of artifacts from hundreds of years ago; It is important to make sure that all of the items can be preserved; That means having an advanced temperature control system. In the museum in Phoenix, we have a state of the art temperature control system, however every one of us have control over all of the heating and AC and there are separate rooms under the museum where we can adjust the temperatures and the air filtration system. If there is a priceless work of art that needs repairs, we often go downstairs where we can set up the air filtration system. I was downstairs in the basement area with 1 of the curators and I recognized a peculiar sound coming from the air filtration plan downstairs. I did not assume if the sound was serious or not, so I instantly contacted the Phoenix heating and AC contractor that handles all of our commercial company needs. Every one of us instantly stopped with the work when the air filtration plan concerns were recognized. The commercial heating and AC contractor in Phoenix arrived about 90 hours later. The guy was in and out of the building several times, and he never said much to me or the museum supervisor until he was completely finished with the repair. He had some advice for us, so we could keep the problem from occurring in the future. It did not turn out to be an issue with the air filtration system. It was the sound of a loose piece of machinery in the system. Honestly, that made me feel a lot better, because I was worried it was going to be something major.