Technical data
Flue gas installation
Installation and maintenance instructions ecoTEC plus 0020116700_06  25
7
7  Flue gas installation 
7.1  Air/flue gas duct  
a
 Danger!
Risk of death and risk of damage from 
use of non-approved air/flue gas ducts!
Vaillant boilers are system-certified only in 
combination with genuine Vaillant air/flue 
gas ducts. The use of other accessories can 
cause personal injury and material damage 
as well as operating faults.
 > Only use genuine Vaillant air/flue gas 
ducts. 
The CE mark is valid only if the appliance is operated with 
Vaillant air/flue gas ducts. 
All ecoTEC plus boilers feature a 60/100mm diameter air/
flue gas connection as standard. Selecting the most suita-
ble system depends on the individual installation and appli-
cation conditions. 
Standard 100mm air/flue gas duct
667
87
65
30
74
48
7.1 Scope of delivery of horizontal air/flue gas duct 
Article number 303933
A concentric air/flue gas duct with an outer diameter of 
100mm that can be extended depending on the boiler out-
put range is available.
You can also get a vertical system. For more information 
refer to the ¬installation manual for the air/flue gas 
duct. 87° elbows and 45° elbows are also available for 
greater flexibility during installation.
8 4 
1456 
542 
901 
7.2 Scope of delivery of vertical air/flue gas duct 
Article number 0020060570 and 0020065937
Optional 125mm air/flue gas duct
A concentric air/flue gas duct with an outer diameter of 
125 mm is available that can be extended depending on the 
boiler output range. The flues gas spigot Ø80/125 (with 2 
measuring apertures) Art. No.: 0020147469 will be required. 
You can also get a vertical system. For more information 
refer to the ¬installation manual for the air/flue gas 
duct.
07
1020
70
51
7.3 Scope of delivery of horizontal air/flue gas duct 
Article number 303209
1430
70
7.4 Scope of delivery of vertical air/flue gas duct 
Article number 303200










