I am a nurse and work in a house built in 1890.

The black circular machine was placed in an office that gets cold when the room temp is 80 degrees.
Tbe house is in Shrewsbury, New Jersey. It’s an historic house. In 1890 a family lived there;Mom, Dad and one child named Hannah. Staff has experienced interruptions in electrical equipment, rapid drops in temperature, sounds of a child playing .
My coworker and I were In the attic one day, there was a stack of five folding chairs leaning against the wall, the chairs rose to a vertical position then slammed back down. Made the hair stand up on our neck!
Hannah died in the house and still lives there. Hannah likes to make her presence known to many of the staff that works there; Doctors and nurses.