KBD Series Manual 25
Maximum Equivalent Vent Length Tables (connued):
Maximum vent lengths are specic to the fuel type of the tankless water heater. It is imperave when
performing equivalent vent length calculaons that the gas type be taken into consideraon.
0 21 (6.4) ** 26 (7.9) ** 36 (11.0) ** 36 (11.0) **
1 16 (4.9) ** 21 (6.4) ** 31 (9.4) ** 31 (9.4) **
2 11 (3.4) ** 16 (4.9) ** 26 (7.9) ** 26 (7.9) **
3 6 (1.8) ** 11 (3.4) ** 21 (6.4) ** 21 (6.4) **
4 - 6 (1.8) ** 16 (4.9) ** 16 (4.9) **
5 - 1 (0.4) ** 11 (3.4) ** 11 (3.4) **
6 - - 6 (1.8) ** 6 (1.8) **
0 45 (13.7) ** 50 (15.2) ** 60 (18.3) ** 60 (18.3) **
1 40 (12.2) ** 45 (13.7) ** 55 (16.8) ** 55 (16.8) **
2 35 (10.7) ** 40 (12.2) ** 50 (15.2) ** 50 (15.2) **
3 30 (9.1) ** 35 (10.7) ** 45 (13.7) ** 45 (13.7) **
4 25 (7.6) ** 30 (9.1) ** 40 (12.2) ** 40 (12.2) **
5 20 (6.1) ** 25 (7.6) ** 35 (10.7) ** 35 (10.7) **
6 15 (4.6) ** 20 (6.1) ** 30 (9.1) ** 30 (9.1) **
**SW 1 in DIPSW 1 is “OFF” for lengths greater than or equal to 21 feet
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