24
Venting the Boiler
WARNING
Improper venting of the boiler can result in excessive levels of
carbon monoxide which can lead to severe personal injury or
,
death.
This boiler must be vented in accordance with the
“
”
Venting of Equipment section of the latest edition of the
ANSI Z223 1 NFPA 54 Natural Fuel Gas Code in the USA
. /
and or the Venting systems and air supply for boilers
/
“
“
section of the latest version of the CAN CGA B149 1 Natural
/
.
Gas and Propane Installation Code in Canada as well as all
,
applicable local building codes and regulations
.
Follow all
instructions and guidelines when venting the boiler Venting
.
should be performed only by a licensed professional.
The boiler must be properly vented to ensure a constant supply of
clean intake air and to ensure that exhaust air is properly removed
from living areas When venting the boiler follow these guidelines
.
,
:
●
Do not install the boiler in areas with contaminated air
(
,
,
,
,
,
containing a high level of dust sawdust sand flour aerosols
or any other such airborne contaminants as contaminants
),
can cause operational problems The warranty does not cover
.
damage caused by contaminants in the installation area If
.
you must install the boiler in an area with contaminated air,
use direct venting to supply air from outside the building We
.
recommend regular filter cleaning and maintenance in these
areas.
●
For best results keep the venting system as short and straight as
,
possible.
●
Locate the boiler as close as possible to the vent termination.
●
Do not connect the boiler vent to a vent for any other gas boiler
or vent stack.
●
For horizontal runs slope the horizontal section upward toward
,
the vent termination at a rate of
1
/
4
( %
).
in per foot 2
slope
●
Create an airtight seal at each joint in the exhaust and intake air
pipes from the boiler collar to the vent termination.
●
To avoid moisture and frost build up and to maintain clearances
-
to openings on adjacent homes 45 elbows 90 elbows or tees
,
°
,
°
,
may be attached to the end of the termination vent pipe to
direct the exhaust plumes away from buildings as long as the
,
total allowable vent lengths maximum number of elbows and
,
,
distances to air intake restrictions are observed.
●
Do not store hazardous or flammable substances near the vent
termination.
●
If this boiler will be installed in areas where snow is known to
accumulate protect the vent termination from blockage
,
.
●
Provide a minimum of 1 foot clearance from the bottom of the
exhaust above the expected snow accumulation level Snow
.
removal may be necessary to maintain clearance.
●
Ensure that the vent termination is at least 12 in 305 mm above
(
)
ground or as required by local codes
,
.
●
Support the vent pipe with hangers at regular intervals or as
required by local codes.
●
Exhaust and intake air pipes must be glued and properly
supported at least every 4 ft 1 2 m
( .
).
●
The vent for this appliance shall not terminate over public
walkways or near soffit vents or crawl space vents or where
;
condensate or vapor could create a nuisance or hazard or cause
property damage or where condensate or vapor could cause
;
damage or could be detrimental to the operation of regulators,
relief valves or other equipment
,
.
5 1 Selecting a Vent Type
.
All boilers are prepared at the factory to be direct vented sealed
(
combustion VESTA recommends direct air vent installations
).
whenever possible to avoid back drafting cold air through the
boiler unit If you cannot use a direct vent ensure that an ample
.
,
supply of make up air is available in the installation location
-
.
VESTA also recommends installing a new vent system with this
appliance If reusing an existing vent system thoroughly inspect
.
,
it for punctures cracks or blockages prior to connecting it to the
,
,
boiler.
Direct Venting
The boiler uses 3 in diameter exhaust and 3 in
diameter intake air ducts To ensure the draw of air directly from
.
and exhaust of air directly to the outside of the building create an
,
airtight seal from the boiler collar to the vent termination.
Intake materials can be made of ABS PVC CPVC PP galvanized
,
,
,
,
steel corrugated aluminum or any other such materials If you
,
.
use a corrugated material ensure that there is not inadvertent
,
crimping of or damage to the intake air pipe
,
,
.
When using direct venting maintain the following venting
,
clearances as required by
,
ANSI Z21 10 3 and the National Fuel
.
.
Gas Code ANSI Z223 1 NFPA 54 and CAN CGA B149 1 Natural
,
. /
,
/
.
Gas and Propane Installation Code
:
5 Venting the Boiler
.