above
alarm
alert
apartment
background
building
ceiling
check
control
danger
detect
detector
device
electronic
emergency
equipment
fire
heat
home
house
indoor
interior
life
monitoring
monoxide
object
objects
office
plastic
prevention
protect
protection
rescue
risk
roof
room
safety
security
sensor
signal
smoke
structure
system
technology
threat
tool
wall
warn
warning
white