Burnham FREEDOM - Page 20

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TABLE 7.8: VENT/ AIR INTAKE FITTING EQUIVALENT LENGTH
VENTFITTING EQUIVALENTLENGTH(ft)
60/100mm90°CONCENTRICELBOW 4.5
60/100mm
45°CONCENTRICELBOW 4.0
80/125mm
90°CONCENTRICELBOW 8.5
80/125mm
90°SWEEPCONCENTRICELBOW 5.5
80/125mm
45°CONCENTRICELBOW 3.0
80/125mm
90°CONCENTRICSUPPORTELBOW 8.5
3”
SINGLEWALL90°ELBOW 5.5
3”
SINGLEWALL45°ELBOW 4.0
TABLE 7.9: SUMMARY OF VERTICAL VENTING OPTIONS
VENT OPTION # 5 6
CLASSIFICATION USED IN THIS
MANUAL
VERTICAL
TWIN PIPE
VERTICAL
CONCENTRIC
ILLUSTRATED IN FIGURE 7.10 7.11
VENT PIPE PENETRATION
THROUGH STRUCTURE
ROOF ROOF
AIR INTAKE PIPE STRUCTURE
THROUGH STRUCTURE
ROOF ROOF
VENT PIPE SIZE 3"
80/125mm CONCENTRIC
AIR INTAKE PIPE SIZE 3"
MAXIMUM LENGTH
VENT
FCM070 49.5 ft. 49.5 ft.
FCM090 49.5 ft. 49.5 ft.
FCM120 49.5 ft. 49.5 ft.
INLET
FCM070 49.5 ft. 49.5 ft.
FCM090 49.5 ft. 49.5 ft.
FCM120 49.5 ft. 49.5 ft.
MINIMUM LENGTH
VENT
FCM070 2 ft. 2 ft.
FCM090 2 ft. 2 ft.
FCM120 2 ft. 2 ft.
INLET
FCM070 2 ft. 2 ft.
FCM090 2 ft. 2 ft.
FCM120 2 ft. 2 ft.
VENT TERMINAL
STRAIGHT TERMINAL BY VENT
SYSTEM MFR. (TABLE 7.5)
U.S. BOILER #101495-01
CONCENTRIC TERMINAL
(TABLE 7.4b)
AIR INTAKE TERMINAL
3" 180° ELBOW
(FIGURE 7.10)
VENT MATERIAL
APPROVED STAINLESS STEEL
VENT SYSTEM
U.S. BOILER 80/125mm
VENT COMPONENTS
SHOWN IN TABLE 7.4b.
AIR INTAKE MATERIAL GALVANIZED OR PVC