I have a sofa in front of an in-wall heater, which is also under a window. I keep it pulled a little out from the window so the heat can rise and it works fine. You could move the chair to the general vicinity of where the sofa is now so it wouldn't block the opening to the dining room.

Or, keeping the sofa facing the fireplace, push the sofa against the wall, so you have 54 inches on one side.

Or flip the rooms - make this the dining room and put the living room furniture in the current/former dining room.

I'd put the sofa back against the short wall opposite the heaters even if it sticks out a bit (if it sticks out too much, then I guess this doesn't work). And put the brown chair opposite the sofa (back to the heater and the window. By all means, mount the tv over the fireplace; you need the room!

If @Dulcibella's suggestion of pushing it right up against the wall makes it too boxy why not put it an an angle?

Push it forward and right up to the wall on the right and then pull the side closest to the window backwards towards your entry table. This should allow you to view the tv better as you'r almost opposite it and see out the windows.

Then take your entry table (which is surprisingly well shaped for this arrangement), turn it around and place it centered behind the couch. The cut corners of the table should work well with this angled arrangement. Pop your lamp back on top the table (I see an electrical point on the wall you're couch could be angled on). This will be great for reading.

Put some large art on the wall where the table was and angle the large coffee table with the couch if possible.

If you are mounting the tv put the armchair in it's place facing the angled couch and coffee table and put its footstool on the other side of the fireplace, angled to mirror it.

Good luck!

If you put the sofa in front of the heater, make a reflector to keep the sofa from absorbing all the heat. Just measure the back of the sofa, cut a piece of cardboard a little smaller than the sofa measurement. Cover with foil and lean it against the back of the sofa. It makes a big difference!

If you don't use the fireplace, hide it with floor-to-ceiling curtains. Trying to work the fireplace into the layout is too tricky with the existing needs of the room and your current limitations with regard to furniture. You can test it out visually with some spare bedsheets, tacks, and safety pins to see if that creates more/better options. And while it might be nice to keep the fireplace visible, it might not be serving your immediate needs especially if you don't use it and need lots of floor space for little ones. From there you can move the furniture in a way that makes the most sense for flow and using the space.

Have you considered right-sizing your furniture? If that is not an option, bring the sofa *closer* to the fireplace, not pushed well away from it. Make a cozy sitting area by removing the silver cabinet and placing it on the short wall, or using it as a sofa table right up behind the sofa to put reading lamps etc on. Put your arm chair in the corner where the silver cabinet was to make a cozy reading nook and create a conversation circle with the furniture at the same time. This room is all about cozy, not space, and if you are not able or willing to invest in finding furniture that fits the room right, go for a tidy cluttered feel and make a gathering place around the fire. Good luck!

PS, Great room!

I agree with lydiechan - the sofa and coffee table need to be moved forwards towards the fireplace, the TV mounted above and the arm chair moved out of the doorway to be against the wall where the silver cabinet is. You will sacrifice floor space in front of the fireplace but the room is definitely built to have a cosy rather than "open" feel. A small side table pushed up agains the heater where the armchair and the sofa meet would be great for a lamp or as a place for books, etc. and create a pleasing L shape in front of the fireplace/TV. Moving the armchair away from the open doorway will make a big difference in the flow of the room and create the feeling of more open space. Moving the couch forward will create a little more space for the entry way, making it feel less claustrophobic when you first walk in the door.

Instead of making a reflector, purchase a plastic heat deflector hood that attaches with magnets to the heating vent register. They're clear, adjustable, and safer than cardboard and foil. Most Walmarts and "big box" hardware stores carry them.

Like other posters, I suggest you push the couch and coffee table closer to the fireplace and also push the couch close to the window wall, maybe with a small table or floor lamp between it and the window wall. This will give you much more room on the other end of the couch for walking by etc, and encourage the entryway feeling because when you walk in, you will have to walk to the other end of the couch to "enter" the living room. (I am assuming the front door is on the window wall).

If the brown chair stays in the same area that it is in now, pull it in closer to the coffee table and couch.

If the TV stays in its current area, I would get something much slimmer or smaller for the TV (a small bench?) and place whatever ends up holding the TV at an angle instead of against the wall. Even if you still use the current piece of furniture, angle it. Hmmmm - How about using the entryway table for the TV? It seems slimmer and would not visually block the book shelves when in front of them. If the couch is pushed closer to the TV the may be room for you to use the current TV stand in the entryway...

Orrr....

If you don't use the fireplace, could you just put the TV in front of it on a slim bench or other low table. Another thought would be to mount the TV at view-level on the bookshelves to the right of the fireplace, and move the brown chair to the left of the fireplace.

Good luck!