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WARNING: Air openings that provide fresh air from an adjoining unconfined space shall not be blocked
or obstructed in any way. Installation of unit should allow a minimum of 2" clearance from any part of the
heater to any of the ventilation openings.
Fig. 2 Ventilation options for confined space.
20008055
L
W
D
T104
Fig. 1 Minimum flue diameter and flue damper positions.
T104
flue damper
10/27/03 djt
Option 1
- Vents to
Adjoining
Room
Flue Damper Closed for Unvented
Operation and Maximum Heat
Output
Flue Damper Locked Open
to a Minimum Venting Area
of 34 sq. in. (for areas where
unvented products are not
permitted)
NOTE: For round flue opening
minimum flue diameter (D) - 7".
For square or rectangular flue
opening, length x width (L x W)
must equal 30 sq. in.
Option 3 -
Vents to
Adjoining
Room
Option 2 -
Remove Door
to Adjoining
Room
vent370-2
Ventilation options
3/26/99 djt
12"
12"
VO370-2
7
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