WAspirating smoke detector
WAutomatic fire suppression
WFire damper
WFire extinguisher
WFire pump
WFire sprinkler
WFire sprinkler system
WFire suppression system
WGaseous fire suppression
WHeat detector
WManual fire alarm activation
WOptical beam smoke detector
WPressurisation ductwork
WQ2B
WSiamese connection
WSmoke detector
WSprinkler fitting
WStirrup pump