Sprinkler systems are required in all new one- and two-bedroom single-family homes that are built in California, Maryland, and Washington, D.C., but not in other states. Putting smoke detectors in each bedroom and outside each bedroom, in your kitchen, and even in your basement if you can't afford a sprinkler system will help you stay safe in case of fire. Take a look at Amazon's top pick, which is powered by a lithium battery and lasts for as long as the alarm is set off.