Welcome to the Forum and congrats on your 2910.
We have a 2910 (it is our 3rd PC). As the others have stated, I have never heard of that option. It must be new. We do have thermopane windows. I find the rig quiet. Let us know when you find out what it is.
When we had our rig built, we added some upgrades. We had a beveled mirror installed behind the sink and on the wall to the left of the stove. One of the best things we did. Water splashes when doing the dishes and my concern was that it would sit on the wood paneling behind the sink and spot the wood. Not an issue now. I just wipe it with glass cleaner and we are good to go. It also has the added advantage of making the living space seem larger.
We put some photos of what we did on the Forum. You can search and find them. If you have any other questions, PM me.
Judi