What is considered a bedroom in Cleveland

My wife and I recently starting our investment journey.  We’ve decided on Cleveland Ohio.  A question I have for the Cleveland contractors is what is considered a bedroom space within a house.  We recently purchased a duplex and since we are from California the realtor said to be considered a bedroom, all you need is a window you can climb out of in case of an emergency, for the fire department.  In California, you have to have a closet to be considered a bedroom.  Is this true to be considered a bedroom all you have to have is a window, for fire department to access?