DW1401831 Rev.K1
Sep 18, 2015
7
Figure 4: Alternative heat detector coverage configurations
When installed on the ceiling, spot type heat detectors must be located a minimum of 10 cm (4 in.) from side walls.
When installed on side walls, the detector must be between 10 cm (4 in.) and 30 cm (12 in.) from the ceiling, as shown
in Figure 5.
Figure 5: Detector placement near ceiling or wall joints
A
A
A
A
B
B
B
B
C
C
C
C D
D
D
D
Listed Spacing
9.1m x 9.1m = 84m
2
(30ft x 30ft = 900ft
2
)
A : 7.6m x 10.4m = 79m
2
(25ft x 34ft = 850ft
2
)
B : 6.1m x 11.3m = 69m
2
(20ft x 37ft = 740ft
2
)
C : 4.6m x 11.9m = 54m
2
(15ft x 39ft = 585ft
2
)
D : 3.1m x 12.5m = 38m
2
(10ft x 41ft = 410ft
2
)
10cm
(4in.)
Acceptable here
10cm
(4in.)
minimum
30cm
(12in.)
maximum
Never here
Top of detector
acceptable here
Ceiling
Sidewall
Note : Measurements shown are to
the closest edge of the detector.
