Teledyne 300 Instruction Manual page 19

1.6.8 Exhaust connections (see Figure 1.4)
A single 1/4" O.D. tube should be connected from the Analyzer sample exhaust to an
area outside of the room the Analyzer occupies. The maximum length of the exhaust line
should not exceed 30 feet.
CAUTION
Connect the exhaust fitting on the rear panel (See Fig. 1.4) to a
suitable vent outside the analyzer area.
P/N 02163G Teledyne API Model 300 CO Analyzer Instruction Manual - Page 13