Ei Electronics EI105C Specifications download pdf (Page 3)

All the Heat Alarms and Smoke Alarms should be

interconnected to ensure the early warning will be heard,

particularly by somebody sleeping. A properly designed early

warning fire system ensures the alarm is given before the

escape routes become blocked with smoke. Therefore there

must be Smoke Alarms along the escape routes as Heat

Alarms would not give sufficient warning. However, a fire in a

closed room (e.g. kitchen) adjoining the escape route, can

eventually cause the corridor to become smoke-logged due to

smoke leaking out from around the door before adequate

warning can be given by detectors in the corridor. (Smoke

leaking out from a room is often cool and slow moving so it

can take a long time to rise to the ceiling, and travel to a

detector which could be some distance away). A Heat Alarm

in the closed room will give early warning of fire in that

roomand help overcome this problem.

Figure 1 illustrates where Heat Alarms and Smoke Alarms

should be located in a typical two storey house. Note the

spacings in “Protection Levels” which ensure the early

detection of fire and that the warning will be heard.

Locate Heat Alarms in rooms adjoining or on escape routes -

kitchens, garages, boiler houses etc. where Smoke Alarms

are unsuitable. Install within 5.3m (17 feet) of potential

sources of fire.

Protection Levels

Recommended Protection

Minimum Protection

13425-R1-12V COMMON-UC 29/9/09 7:56 AM Page 3

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Ei Electronics EI105C Specifications Page 3