Hi, I just bought a house that was built in the mid 40's. It has the old floor heaters. I want to turn the floor heater off, but I have no clue on how to do it. I see two levers , but I don't know what they do since I don't see any writing by the levers. Thank you!!

Before you start turning off floor vents consider what will happen to the furnace due to lack of air movement. This can be a problem.