LP-325 Rev. 009 Rel. 004 Date 12.2.20
24
Description
Stock Code
2” PVC Concentric Termination Kit
KGAVT0501CVT
3” PVC Concentric Termination Kit
KGAVT0601CVT
2” Stainless Steel Termination Kit
V500
3” Stainless Steel Termination Kit
V1000
4” Stainless Steel Termination Kit
V2000
3” Polypro Vent Kit
8400P-001
Table 10 - Optional Vent Kits
9. Due to potential moisture build-up, sidewall venting may not
be the preferred venting option. To save time and cost, carefully
consider venting installation and location.
10. Horizontal lengths of exhaust vent must slope back towards the
appliance not less than ¼” per foot to allow condensate to drain
from the vent pipe.
11. Do not terminate vent where vapors can accumulate and harm
people or pets.
12. When it can be avoided, do not terminate vent where vapors can
damage shrubs or plants. Such damages are not covered by product
warranty.
13. Moisture in the exhaust gas will condense as it leaves the vent
terminal. In cold weather this condensate can freeze on the exterior
wall, under the eaves, and on surrounding objects, including
shrubs. Some discoloration to the exterior of the building is to be
expected. However, improper location or installation can result in
severe damage to the structure or exterior finish of the building,
and increase the opportunity for vent blockages and nuisance
shutdowns.
14. In vacant chimney applications, install and seal a rain cap over
existing chimney openings.
15. All piping must be fully supported. Use pipe hangers at a
minimum of 4 foot intervals to prevent sagging of the pipe where
condensate may form.
16. Do not use the heater to support any piping.
17. A screened straight coupling is provided with the heater for use
as an outside exhaust termination.
18. A screened inlet air tee is provided with the heater to be used as
an outside intake termination.
19. Maximum Snow Level Determination: These installation
instructions reference snow levels in establishing a minimum height
for the installation of exhaust vent or air intake terminations. Snow
levels shall be determined as follows:
a. The installation location may, by ordinance, designate how snow
levels are calculated in that location; or
b. In the absence of specific ordinances, snow levels shall be
calculated from the average monthly maximum depth of snow
accumulation as indicated by the National Weather Service’s 10
year statistics for the installation location/geographical area.
In addition:
•
Total length of vent piping shall not exceed the limits specified
in this manual.
•
The vent piping for this direct vented appliance is approved
for zero clearance to combustible construction.
•
The flue products coming from the exhaust vent will create a
large plume when the heater is in operation. Avoid venting in
areas that will affect neighboring buildings or be considered
objectionable.
•
DO NOT locate exhaust vent or intake pipe in a parking area
where machinery may damage the pipe.
•
DO NOT vent near soffit vents, crawl space vents, or other
areas where condensate or vapor could create a nuisance or
hazard or cause property damage.
•
DO NOT vent where condensate vapor could cause damage
or could be detrimental to the operation of regulators, relief
valve, or other equipment.
In the Commonwealth of Massachusetts and as Required by
State and Local Codes:
The vented gas fueled appliance shall not be installed so its
combustion, ventilation, or dilution air is obtained from a bedroom
or bathroom.
Signage: Whenever any through-the-wall (horizontal or sidewall)
vent is installed less than seven feet above the finished grade, a
metal or plastic identification plate shall be permanently mounted
to the exterior of the building at a minimum height of eight feet
above grade directly in line with the exhaust vent terminal. The
sign shall read, in print no less than 0.5 inches in size, “GAS VENT
H. Applications
1. Direct Vent Installation of Exhaust and Intake
If installing a direct vent option, combustion air must be drawn from
the outdoors directly into the appliance intake, and exhaust must
terminate outside. There are three basic direct vent options detailed in
this manual: 1. Side Wall Venting, 2. Roof Venting, and 3. Unbalanced
Venting.
Be sure to locate the appliance such that the exhaust vent and intake
pipe can be routed through the building and properly terminated.
Different vent terminals can be used to simplify and eliminate multiple
penetrations in the building structure (see Optional Equipment in
Venting Section). The exhaust vent and intake pipe lengths, routing
and termination methods must all comply with the methods and limits
given in the Venting section of this manual.
When installing a combustion air intake from outdoors, care must be
taken to utilize uncontaminated combustion air.
NOTE:
To prevent
combustion air contamination, see Table 3.
DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS”.
Marking of Exhaust Vent and Intake Pipe: Piping used for ventilation,
make-up, or combustion air intake shall be labeled as follows:
a. Throughout the entire developed length:
i. Labels must be placed every ten feet for exposed/visible piping; or
ii. Labels must be placed every three feet for concealed piping.
b. At all changes of direction;
c. On each side of a penetration through a partition, wall or ceiling;
and
d. The labels shall be black lettering that:
i. Indicates that the piping is used for ventilation, make-up, or
combustion air intake, and
ii. The letters shall be sized equal to a minimum of the pipe diameter.
However, for piping with a diameter exceeding two inches, said
lettering does not need to be larger than two inches.
The following table lists optional exhaust/intake terminations available
from HTP:
