The Vent Connector shall be installed so as to avoid turns or other construction features
which create excessive resistance to flow of vent gas. It shall be installed without any dips or
sags and shall slope upward at least 1/4" per foot.
A manually operated damper shall not be placed in the Vent Connector or chimney of
any gas utilization equipment.
The Vent Connector shall be firmly attached to draft hood outlets and flue collars. Joints
between sections of connector piping shall be fastened by sheet-metal screws or other
approved means. The Vent Connector shall be supported for the design and weight of the
material employed to maintain clearance and prevent physical damage and separation of
joints.
A draft hood or a barometric draft regulator shall be installed in the same room or
enclosure as the equipment in such a manner as to prevent any difference in the pressure
between the hood or regulator and the combustion air supply (see Figures 3 and 4). In no
case shall the relief opening of the draft hood or barometric draft regulator be located at a
point lower than the top of the highest flue passage in the equipment.
Part 1
Installation
Continued
4
Part 1 Installation
Figure 3:
Recommended Locations for Draft Hoods
IV
Chimney, Vent
Connector and
Draft Control
Continued
Figure 4:
Location for Barometric Draft Regulators
Note: Figures 3 and 4 :
Copyright by American
Gas Association.
Used by permission of
the copyright holder.
Note:
Figures 3 and 4 :
Copyright by
American Gas
Association.
Used by
permission of the
copyright holder.
