It turned out, that scales are quite off with these renders. Obviously, since this is whole new thing.
For the next round, I would like to recommend to you, that you use a real world scale model. To do this, use "measure tool" what I suppose can be found in any 3D pack and scale Poser, Daz or Makehuman3D model accordingly at about average height of 178 cm tall male (5,8 ft). Model everything according to this model. If it is chair, scale it so that your reference model is next to it, if it is a room, your reference model is right there in the middle, to see how the couches, windows, the doors, door handles etc should be.. Then finally place the camera according to this reference models eye height..
That should fix this minor issue, and we are all good to go where no man has gone before.