I put it in this section because I am inclined to think it is some sort of space heater? Thanks in advance!
Wait…is it an abandoned exhaust fan?
Looks like a space heater vent to me.
No appliance connected /abandoned.
A fan-powered sidewall vent for a heating appliance of unkown type.
Thanks for the confirmation. There was a brand new HE furnace so this must have been for the old obe