Manual

Horizontal(CategoryIll)venting systems must be installed
in accordance with these instructions,
Maximum Horizontal Vent Length For Stainless Steel Vent
Pipe - 30' Plus One 900 Elbow Plus Vent Terminal,
Minimum Horizontal Vent Length - 2.' Plus One 900 Elbow
Vent Termination,
Additional elbows are equivalent to 6 feet of straight pipe
for 4" diameter 90 ° elbow or 3 feet of straight pipe for 3"
diameter 90° elbow, 2, 3, 4, 5, Section Boilers use 3" vent
pipe; for 6, 7 Section Boilers use 4" vent pipe,
CHOICE OF VENT PIPE MATERIAL
• U. L.ListedZ-FlexZ-VentStainlessSteelVent Pipe.
• U.L.ListedHeat-FabSaFT-Vent StainlessSteelVent
Pipe.
• U. L.ListedFlex-LStar-34StainlessSteelVent Pipe.
• U. L.ListedProTechSystems FasNSealStainlessSteel
Vent Pipe.
Figure 8 - Induced Draft High Efficiency Boilers