Owner's Manual

C199 Manual 27
Determine the number of 90 degree elbows in the vent system. (two 45 degree elbows count as one 90 degree elbow.)
Refer to the tables below to nd the maximum vent length based on the number of elbows and terminaon style.

Maximum vent lengths are specic to the fuel type of the tankless water heater. It is imperave when
performing equivalent vent length calculaons that the gas type be taken into consideraon.


















   
 
0 80 (24.4) ** 85 (25.9) ** 95 (29.0) ** 95 (29.0) **
1 75 (22.9) ** 80 (24.4) ** 90 (27.4) ** 90 (27.4) **
2 70 (21.3) ** 75 (22.9) ** 85 (25.9) ** 85 (25.9) **
3 65 (19.8) ** 70 (21.3) ** 80 (24.4) ** 80 (24.4) **
4 60 (18.3) ** 65 (19.8) ** 75 (22.9) ** 75 (22.9) **
5 55 (16.8) ** 60 (18.3) ** 70 (21.3) ** 70 (21.3) **
6 50 (15.2) ** 55 (16.8) ** 65 (19.8) ** 65 (19.8) **
**SW 1 in DIPSW 1 is “OFF” for lengths greater than or equal to 21 feet


 












   
 
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) **