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VI
CTORY
II V
HS Models
Heat-Fab Saf-T Vent System
Boiler
Model No.
Minimum
Length, Ft.
0 to
5500 Ft.
Altitudes
5500 to
7000 Ft.
Altitudes
7000 to
10,000 Ft.
Altitudes
Equivalent
Length of
each 90°
Elbow, Ft.
Max. Equivalent Length (Ft.)
VHS-30, 40 40 40 3 2
60, 90
and 120
VHS-150 40 40 20 3 2
VHS-180 40 20 20 3 2
ProTech FasNSeal System
Boiler
Model No.
Minimum
Length, Ft.
0 to
5500 Ft.
Altitudes
5500 to
7000 Ft.
Altitudes
7000 to
10,000 Ft.
Altitudes
Equivalent
Length of
each 90°
Elbow, Ft.
Max. Equivalent Length (Ft.)
VHS-30, 30 30 30 6 2
60, 90
and 120
VHS-150 30 30 15 6 2
VHS-180 30 15 15 6 2
Flex-L StaR-34 and Z-Flex Z-Vent System
Boiler
Model No.
Minimum
Length, Ft.
0 to
5500 Ft.
Altitudes
5500 to
7000 Ft.
Altitudes
7000 to
10,000 Ft.
Altitudes
Equivalent
Length of
each 90°
Elbow, Ft.
Max. Equivalent Length (Ft.)
VHS-30, 35 35 35 6 2
60, 90
and 120
VHS-150 35 35 18 6 2
VHS-180 35 18 18 6 2
6
Note: Vent termination is in addition to the allowed equivalent length.