UTC Fire and Security AirSense Stratos EX Installation Manual page 26

Chapter 3: Installation
There is no substitute for carrying out smoke tests prior to installation of pipework
to indicate suitable sampling point location. Remember that cool smoke from an
incipient fire does not behave in the same manner as hot smoke.
Figure 5: Locating the detector outside the area to be protected
(1) Earth bonded metallic sampling pipe
(2) Sampling hole
(3) Filter
(4) Inlet pipe
(5) EX detector
(6) Exhaust pipe
(7) False ceiling
20 Stratos EX Hazardous Area Aspirating Smoke Detection System Installation Manual