A:Answer No need to mount the Nest on the ceiling... It's design allows much lower location... and I read a lot on these about a year ago and my understanding is that you can indeed control, operate, Silence it from the app. Here's a Copy and paste from the Nest website.
"The new Nest Protect has been redesigned from the inside out. It has an industrial-grade smoke sensor, tests itself automatically, and lasts up to a decade. It's also the first home alarm you can hush from your phone without any extra hardware required. And just like the original Nest Protect, it tells you what’s wrong and can even alert your phone."
