Help Identifying Mystery Item on Ceiling of 1980s Property Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[FJDR]

Just moved into this home, built in the 1980s. This is in hall ceiling and seems to always run (cold ish), with no way to reach unit in attic very easily. Where would the controls be?? What is it? Thanks in advance. photo might need turning around