Wow, there's a lot going on here, especially considering it is an empty room. First the warm colors and lines of the wood floor, trim, and heater are the best. The problem for me is the intrusion of the outdoors, adding colors outside the wonderful warm range. Lastly I would have tried the shot with the vase of lavender in the middle of the left window pane; currently it needlessly breaks up the line of the window frame. For a simple image I sure found a lot to say, good luck.
My eyes are immediately drawn to outside the window, perhaps if you had closed the blinds/curtains it would make the viewer focus more on your empty room and vase. I like the lighting and colours in the room.