We’re scientists. We love questions.
Here are a few you asked.

FAQ's
Good Sense about Smart Technology
Q What’s the optimum placement of protection devices in my home?
Q Do I need four kinds of detectors or can one do it all?
Q What are “nuisance alarms”? Why are they a concern?
Q How often should I replace the battery in my smoke, CO and natural gas alarms?
Q When is it time to replace my smoke detectors, CO and natural gas alarms?
Smoke Alarms
Q Why does my smoke alarm "chirp" approximately once every minute?
Q What does it mean when the red light flashes approximately once every minute?
Q What does the continuous green light indicate?
Q Why must I disconnect AC power before changing batteries
Q The green light on my smoke alarm has gone out, what does this mean?
Q How can I tell which smoke alarm in a multi-station system initiated the alarm?
Q What is the total number of smoke alarms or devices I can interconnect?
Carbon Monoxide Alarms
Q What does "move to fresh air" mean?
Q Why didn't the fire department, gas company or emergency responder locate the source of CO after my alarm sounded?
Q Will carbon monoxide alarms detect explosive gas leaks?
Q Can you reset a plug-in CO alarm with the test/silence button?
Q Can I test my CO alarm any way besides pressing the test button?
Q Where should I install my carbon monoxide alarms?
Q What areas should I avoid installation of a carbon monoxide alarm?
Q Can I interconnect carbon monoxide alarms with smoke alarms?
Q What are some common sources of carbon monoxide (CO)?
Q What levels (ppm) of carbon monoxide cause an alarm?
Q Is carbon monoxide heavier than air?
For 120 Volt Wired-In Carbon Monoxide Alarms
Q Why must I disconnect AC power before changing batteries?
Q What does it mean when the red light flashes approximately once every minute?
Q Why does my CO alarm "chirp" approximately once every minute?
Q What does it mean when the red light flashes approximately once every minute?
Q What does the continuous green light indicate?