SECTION TWO – Heater Installation
Figure 2-6: Flue collar
VVVVeeeerrrrttttiiiiccccaaaallll VVVVeeeennnnttttiiiinnnngggg ---- NNNNeeeeggggaaaattttiiiivvvveeee PPPPrrrreeeessssssssuuuurrrreeee
((((SSSSeeeeeeee FFFFiiiigggguuuurrrreeee 2222----7777))))
Vent the heater vertically in a negative pressure (posi-
tive draft) system in accordance with the National Fuel
Gas Code, ANSI Z223.1, and local codes. Class “B”
Double-wall vent connector is recommended; however
single-wall pipe is allowed by the National Fuel Gas
Code in some circumstances. Consult your local code
official for detailed information.
Risk of asphyxiation. Do not use a draft
hood with this heater.
To connect a negative pressure metal gas vent to the
heater, order the appropriate Metal Flue Collar from
thechart below:
Metal Flue Collar Kit
Sta-Rite Part No.
4x6”
77707-0076
4x8”
77707-0077
1. See Table 2-E, below, to determine allowable vent
sizes for your heater.
NNNNOOOOTTTTEEEE:::: Table 2-E is for installations in which the total
lateral vent length (that is, the horizontal distance from
the Metal Flue Collar to the main vertical portion of the
vent) is less than 1/2 the total vent height (the vertical
distance from the flue collar to the vent termination)
and which have three or less elbows in the system. For
venting systems which do not meet these conditions,
consult the National Fuel Gas Code, ANSI Z223.1 (U.S.)
and CSA-B149.1 (Canada).
2-7
Heater Venting – Negative Pressure
Combustion
Chamber
Flue Collar
4" x 8" Metal
Flue Collar
Vent Body
2855 0597 RTV
Clean the Interior Surface
Vent Pipe
Clean and RTV
This Surface
Table 2-E: Permitted Minimum and Maximum Vent Heights By Size and Heater Model
Read “VERTICAL VENTING – NEGATIVE PRESSURE” (above) before using this table.
Type B Double Wall Vent With Type B Double Wall Connector In Feet (Meters)
Model 200
Model 333
Model 400
Vent Size
Min. Height
Max. Height
Min. Height
Max. Height
Min. Height
Max. Height
6 in.
6 Ft. (1.8)
100 Ft. (30.5)
30 Ft. (9.0)
100 Ft. (30.5)
Not Rec.
Not Rec.
7 in.
6 Ft. (1.8)
100 Ft. (30.5)
10 Ft. (3.0)
100 Ft. (30.5)
15 Ft. (4.6)
100 Ft. (30.5)
8 in.
6 Ft. (1.8)
100 Ft. (30.5)
6 Ft. (1.8)
100 Ft. (30.5)
8 Ft. (2.4)
100 Ft. (30.5)
9 and 10 in.
6 Ft. (1.8)
50 Ft. (15.3)
6 Ft. (1.8)
100 Ft. (30.5)
6 Ft. (1.8)
100 Ft. (30.5)
Type B Double Wall Vent With Single Wall Connector In Feet (Meters)s
Model 200
Model 333
Model 400
Vent Size
Min. Height
Max. Height
Min. Height
Max. Height
Min. Height
Max. Height
6 in.
6 Ft. (1.8)
15 Ft. (4.6)
Not Rec.
Not Rec.
Not Rec.
Not Rec.
7 in.
6 Ft. (1.8)
8 Ft. (2.4)
10 Ft. (3.0)
20 Ft. (6.0)
15 Ft. (4.6)
50 Ft. (15.3)
8 in.
Not Rec.
Not Rec.
6 Ft. (1.8)
20 Ft. (6.0)
8 Ft. (2.4)
20 Ft. (6.0)
9 in.
Not Rec.
Not Rec.
Not Rec.
Not Rec.
6 Ft. (1.8)
6 Ft. (1.8)
10 in.
Not Rec.
Not Rec.
Not Rec.
Not Rec.
Not Rec.
Not Rec.
