Hi @goredr, I meant start a new thread where your post was the opening statement. But, I like your picture. It helps very much to describe what you are asking. If you still care to begin your own thread, you just enter it at the top and add the picture along with it. You give the tread a title. Your Title could be something like "advice needed for mirror placement in makeup/vanity area". Or something shorter. I think you will get more feedback with your own post because it will be new. This thread is old and may be ignored. I think a lovely mirror of your choosing would look special and personal to you, between the sconces. It could be a long oval, a rectangle, with or without frame. I think a bevel would be a nice touch, especially with a frameless mirror. Since that is a makeup area, what other lighting will you have? I feel that the lighting you have now, may not be bright enough.

A cast iron sink correctly bolted to framing will stay put with few problems. Many public restrooms still use this type of installation. Lag screws can eventually come loose. Through bolting with large washers against the wood will hold up fine. I usually mount the 2x in the wall, lay the sink plate against it and drill matching holes. The bolts are then put through large washers (or even square of scrap steel about 2x2 inches), then a nut is attached to hold them in position. The bolts stick through the drywall (or cement board and tile) far enough to put nylon self locking bolts to hold the sink to the wall (or the bracket that the sink then attaches to). A couple of 3/8 bolts will hold just about anything you can dish out.

Thanks Cheerpeople. :) I went out to the new house and they were painting, so it was looking like a "real" house now, which gave me a much better perspective. Armed with tape measure and my circle of cardboard, I determined the diameter is fine. But as justgotabeme was saying, what surrounds it makes a difference. The lights would be next to a short wall from the ceiling because the room behind it has pony walls and open walls. But the "pony" wall continues at the ceiling and comes down 17" ish. That means the semi-mount fixture would hang almost as low as the end of that wall, and I'm afraid it will look too crowded. So I think the flush-mount is the way to go. I really do like the semi-flush one, but this area is adjacent to the foyer, which is going to have two very large chandeliers, and I don't want it to be so completely busy with multiple conflicting hanging fixtures that compete with each other! Thanks everyone, I really appreciate all the help.

The fundamental issue is that fan/blower flow rates are measured in open air. The result is the zero static pressure flow rate. In a hood with filter, shape transitions, duct losses, and make-up air pressure losses, the actual flow rate is likely to be in the 200 - 300 CFM region. An 18-inch x 30-inch hood has an entry area of 3.75 square feet. At 90 CFM/sq.ft., the actual flow rate called for is ~ 340 CFM, requiring a motor rated at 500 CFM or higher, depending on myriad factors. And even if this is achieved, if the cooking plume is not entirely captured due to a smaller than needed hood aperture, there will still be grease, moisture, and odor escaping into the room.