Do you mean like this?
Help with piano placement
When I was thinking of exchanging my upright for a grand it was difficult to know where to place it so that it would be easy to approach both the bay window and our dining table at the same time. It has recently occurred to me that if I placed a grand on dollies the piano would be moveable by one person so that any position I had it placed in could be changed.
Danno, but different from one of these?
Depending on your climate, how well your house is insulated, and the structure of the window itself, closing the vent near the window may cause the window to start weeping inside from condensation.
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If you're a zombie and you know it, bite your friend!
Based on everything I can tell from this house, and the house we're in right now (where I also have a closed vent in front of a big picture window) I think it will be ok. The winters are on the mild side here.
- Edited
Danno, so you mean the bench would be in the bottom right corner, like this maybe?
Or maybe you meant to have the piano's bass side parallel to the bottom wall? Either way, I think this room is too small for that kind of position.
If I've misunderstood you again, my apologies! 
Rok, re the corner placement, yes, I was reading recently on the PianoBuyer website their advice to avoid having the tailor in the corner. I didn’t know about that before. In my current placement and in my old house, the tail has been in a corner. It must be mitigated by how open these two spaces are. But in the new space, the room is so small and the opening isn’t that big, so I would imagine that would be a greater concern. The angled placement probably avoids the corner problem, but the straight placement won’t … we’ll see, I’ll have to make some trade offs regardless, it’s just a question of which trade off.
ShiroKuro we’ll see, I’ll have to make some trade offs regardless, it’s just a question of which trade off.
I would have the piano lid opening face the room entrance. Beyond that, I think it’s hard to predict exactly how the positioning will affect the sound. It might just need to be trial and error.
If you need a chuckle… here is the floor plan for my (temporary) piano room. Piano will hopefully be arriving this week or next. Not much room to play with the layout here… tail of the piano will be sticking into the closet in order to fit 
Shawarma, wow! You don’t have any wiggle room at all! Than, goodness for that closet though! Who’s delivering your piano?
"Where's your Steinway D?'
"In my closet."
"I beg your pardon?"
Well, I think I may have figured out the piano placement...
I got out some old curtains and we went over to the house and used them to simulate the rug, and used the back side of some curtains to simulate the piano. We laid out the "rug" and made sure it was to size (8x10) and then did our best to mimic the piano's foot print (the curve is pretty iffy, but the overall length and width are accurate-ish at 5'8" length). And I brought my old bench.
Laying out the curtains with the piano straight in the room (i.e. with the piano's straight edge parallel to a wall), just looking at I can imagine that the sound will rattle around in there and be awful. So I definitely want to go with the angled placement.
So based on that, and on our experience of moving the curtain-template around on the floor, I think the best option, which was many people's favorite as I recall, is to have the rug vertical in the room and the piano at an angle.
Oh, and with this placement, the bottom left corner of the rug does not fall in the open doorway, so it should work.
Here's a better mock-up of this layout than my earlier versions, followed by some photos of the curtains laid out in the room.
What do you think??
Shiro,
I don't mean to beat a dead horse.
But it looks like that piano would fit on the wall on the right!
if you put the edge of the tail right at the edge of the end of the wall on the right (last photo)
and the piano bench almost against the wall we are facing (i bet there is 3' from the end)
then the open part of the piano would face out into the expanse of the room.
(Just tell me to shut up) hehehehehehe
brdwyguy
brdwyguy it looks like that piano would fit on the wall on the right!
Do you mean the wall that's at the bottom in the mock-up photo? That wall is less than 7' long , and that placement would put the piano's tail in the doorway. Even if that wall was longer, I don't want that to be the view from the door, I want it to look nice when you look into the room, esp. since you can see into the room from the living room. And IMO, the best view of a grand is always the curve.
Also, putting the piano along that wall (right in the last photo, bottom wall in the mock-up) would mean the piano opens up to the window wall and I don't think that would be good acoustically....
. If possible, the upper side of the rug can be positioned closer to the bay window so that the end left corner wouldn’t stick out too much at the entryway.