Ignore the fact it claims to be a Vax. Apparently I can't insert a movie here, this is a link to it on Google Drive: https://drive.google.com/file/d/1-aJ6GivDW9fMYw1dxd9Q_QGfPghAHAlp/view?usp=drive_link The roaring sound is mostly the forced air furnace, the vent is right below me taking the video.