Filter
Top Products
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
tnemtrapeD gniniarT lacinhceT31sretaeH retaW etatS
7002 © eessenneT ,ytiC dnalhsA
Multiple Gas Fired Tank-Type Heaters
When venting multiple Category I tank type heaters using Type B vent pipe, follow the
installation tables below which give sizing and data based upon NFPA 54/ANSI Z223.1-2006.
Model: SBN 71-120
latoT.rh/utB 000,021:tupnI Vent Height (feet)
001050302510186”5 :eziS rotcennoC tneV
Input Btu/hr Rise Vent Connector Diameter (inches)
120,000 1' 6 6 5 5 5 5 5 5
120,000 2' 5 5 5 5 5 5 5 5
120,000 3' 5 5 5 5 5 5 5 5
No. of Units Combined Input (Btu/hr x 1,000) Combined Vent/Manifold Diameter
66666677000,0422
66677788000,0633
67788999000,0844
Model: SBN 154; SBD30-150
T.rh/utB 000,451/000,051:tupnI otal Vent Height (feet)
001050302510186”6 :eziS rotcennoC tneV
Input Btu/hr Rise Vent Connector Diameter (inches)
150,000/154,000 1' 6 6 6 6 6 6 6 6
150,000/154,000 2' 6 6 6 6 6 6 6 6
150,000/154,000 3' 6 6 6 6 6 6 6 6
No. of Units Combined Input (Btu/hr x 1,000) Combined Vent/Manifold Diameter
2 300,000/ 308,000 7 7 6 6 6 6 6 6
3 450,000/ 462,000 8 8 7 7 7 6 6 6
4 600,000/ 616,000 9 9 9 8 8 7 7 6
VENT TABLES FOR CATEGORY I - TYPE B GAS VENT