Installation Guide

1
INTRODUCTION
DuraVent manufactures a special vent system
for gas fired appliances as a category II, III and
IV venting system in the USA and Canada as BH
venting system . For continuous operating
exhaust temperature (see table 1) pressure of
6" water column. Pressure vent must be
installed by an experienced installer familiar
with the operation and maintenance of heating
appliances and venting. Failure to follow proper
installation procedures may cause unsafe
conditions.
Do not mix pipe or fittings with other
manufacturers. Vent pitch is important for
condensate removal and improper appliance
connections and may cause unsafe conditions.
Refer to the gas appliance manufacturers
instructions to determine venting requirments
and limitations.
Permits may be required before starting an
installation. It is the responsibility of the
installer to contact local building and fire
officials concerning any restrictions and / or
inspection requirements that may apply.
GENERAL INSTALLATION REQUIRMENTS:
Proper planning for your vent installation will
result in greater safety, efficieny and
convenience, saving both time and money. Use
only DuraVent listed parts. Do not install
damaged parts.
(1) When passing through ceilings and walls
make sure all venting pipes are at proper
clearances from combustible materials, and
that Fire Stops and Wall Thimbles are in
place. Wall penetration assemblies are not
to be located directly behind a heating
appliance.
(2) For horizontal terminations make sure
NFPA 211 and NFPA54 rules are followed
for minimum distance from windows and
openings.
(3) Do not mix and match with other
manufactured products or improvise
solutions.
(4) Never use a vent with an inside diameter
that is smaller than the appliance flue
outlet.
(5) Sections of pipe are joined together by
lining up the female end of the locking lug
with the male end slot. Push them
together and turning clockwise to twist
lock. Screws are not required. If screws are
desired use ¼ long sheet metal screws. Do
not penetrate the inner liner with screws.
(6) Never fill any required clearance space
with insulation or any other combustible
material.
(7) An internal O-Ring gasket on the outside of
the inner liner is on the female end of the
pipe section. These gaskets are lubricated
and help seal pipe sections as they are
connected together. If your O-Ring gasket
is missing or becomes unseated during
connection, you must replace it with a new
O-Ring gasket.
(8) DuraVent recommends that the vent
system be inspected once a year by a
qualified service technician.
(9) For installation in masonry chimneys check
standard for chimney, fireplaces vents
solid fuel appliances.
NFPA 211 for terminations
"MINIMUM CLEARANCE TO COMBUSTIBLE MATERIALS AND BUILDING INSULATION
Diameter , in
Max. Flue Gas Temp, ° F
Installation Position
Enclosure
Clearance, in.
2 through 5
550
Vertical
Fully Enclosed
1
2 through 5
480
Horizontal
Unenclosed
Top -2 / Side - 1
2 through 5
330
Horizontal
Fully Enclosed
3
2 through 5
480
Horizontal
Fully Enclosed
6
Suitable For Interior Exterior Installation
TABLE 1