Recommended Installation Heights
The zone where the unit should be installed is determined by the type of
gas to detect (see the table below).
Detected Gas
Carbon
CO
Monoxide
Nitrogen
NO
2
Dioxide
O
Oxygen
2
* May differ in certain applications. Since hot NO
lighter than air, our empirical data has shown that NO
effective when installed closer to the ceiling.
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5/07
Relative
Density
(air = 1)
0.968
1.58 (cold) *
1.43
The installation heights recommended represent general
guidelines. Always confirm with local laws and regulations, as
these take precedence over manufacturer's
recommendations.
301W User Manual
Honeywell
Installation Instructions
Where to install the Transmitters
Installation Height
1.5 m (5 ft.) from floor
30 cm to 1 m (1 - 3 ft.) from
ceiling
1 - 1.5 m (3 - 5 ft) from floor
from exhaust systems is
2
sensors are more
2
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