In addition to checking those batteries (the famous and let’s be honest annoying ‘CHIRP’ sound they make), placement is key. And, do you have enough? There have been a number of house fires in recent. AND, if you live in an apartment please don’t leave it to the management to place them for you. Even though they are to meet code, you should still read below and make sure you have the smoke detectors needed to save your life.
Smoke Detector Placement (HERE)
Equally important are Carbon Monoxide Detectors, and where to place those (HERE).