Form 43471040
Oct 2013
-27-
SINGLE HEATER VENTING
SINGLE HEATER VENTING
SINGLE HEATER VENTING
SINGLE HEATER VENTING
(HORIZONTAL THROUGH SIDEWALL)
(HORIZONTAL THROUGH SIDEWALL)
(HORIZONTAL THROUGH SIDEWALL)
(HORIZONTAL THROUGH SIDEWALL)
This heater
This heater
This heater
This heater, when horizontally vented, must be installed with the approved venting system.
, when horizontally vented, must be installed with the approved venting system.
, when horizontally vented, must be installed with the approved venting system.
, when horizontally vented, must be installed with the approved venting system. When venting the
heater horizontally through a combustible outside sidewall, the same requirements listed previously for venting
Vertical Through The Roof
Vertical Through The Roof
Vertical Through The Roof
Vertical Through The Roof apply except as follows:
1.
For horizontal venting, the vent lengths may be as follows:
•
Minimum Equivalent Length = 5 ft. of pipe
•
Maximum Equivalent Length = 75 ft. of pipe
Use the following correction factors to obtain the equivalent length:
•
Subtract 15 ft. if the run is horizontal.
•
Subtract 10 ft. for an approved vent cap.
•
Subtract 10 ft. for each elbow beyond 15 ft. from the heater.
•
Subtract 15 ft. for each elbow within 15 ft. of the heater.
NOTE:
NOTE:
NOTE:
NOTE: To minimize problems associated with condensation in long horizontal runs, vent pipe can be insulated.
2.
The horizontal venting system approved with this heater consists of the following components: one 4” Vent
Cap (Part #30297040, one 4” x 36” ‘B’ Vent Section (Part #30496360), and one 4” Wall Thimble (Part
#30500040). Please specify the appropriate number of 24-inch sections of single-wall vent pipe and elbows
when ordering: Vent Pipe (Part #30497240), 90º Elbows (Part #30498040), and 45º Elbows (Part
#30499040).
3.
Avoid locating elbows in the first 5 feet of vent pipe whenever possible. Limit the quantity of 90º elbows to
two (2). When vent pipe is in a horizontal run, it must fall 1/4 inch per 10 foot down towards the vent
terminal. The heater must be installed level.
4.
A minimum clearance of 18 inches must be maintained between the outside wall and vent cap (18”
clearance will provide stability under high wind conditions).
5.
The horizontal venting system shall not terminate:
•
Less than 4 ft. (1.2m) below, 4 ft. (1.2m) horizontally from or 1 ft. (30cm) above any door, operable
window or gravity air inlet into any building. The bottom of the vent terminal shall be located at least 7 ft.
(2.1m) above grade or above snow accumulation level as determined by local codes.
•
Less than 3 ft. (0.9m) from a combustion air inlet.
•
Less than 3 ft. (0.9m) from any other building opening or any gas service regulator.
•
Less than 7 ft. (2.1m) above public walkways.
•
Directly over areas where condensate or vapor could create a nuisance or hazard or be harmful to the
operation of gas utility meters, regulators, relief valves, or other equipment. Building materials should
be protected from flue gases and condensate.
•
Less than 12” (0.30m) when directly below a combustible overhang.
6.
In regions of the country where prevailing winds are consistently higher than 40 mph, it may be necessary to
terminate the vent system above the roof level.
#10 Self-Drill
Screws
(typical)
4 Vent Pipe
(horizontal position)
2 (5cm)
Clearance
Thimble
1/4 (6mm) per
10 ft. (3m) down
toward vent terminal
18 (46cm)
minimum
Draft Inducer
(horizontal position)
Sidewall Vent Cap
(Part No. 30297040)