Hi There!
We have a 2 Story house with 5 Bedrooms, 4 on 1 level upstairs and 1 downstairs.
We bought 2 Nest Protects and I am thinking the most economical and sensible use of them is going to be the downstairs and Upstairs hallway Ceiling.
The 3 Rooms used for sleeping are on the top level 2 at the opposite ends of that upstairs hallway and one very near the master at the end of the hallway.
Seem reasonable?
We still have 3 of the old detectors that are huge and round and 2 of the new generation smaller cavius ones.