Viessmann vitodens Technical Manual page 132

4.2 Design and sizing information for flue pipe connections
Multi-boiler systems with flue gas systems negative pressure
Vitodens 200 and 300
4
132
Size to EN 13384.
The flue gas header in the negative
pressure area should be provided on site.
Suitable components may be obtained
from the following suppliers:
eka Edelstahlkamin GmbH
D 95369 Untersteinach
Jeremias
Schornstein Systeme
Opfenrieder Str. 12
D 91717 Wassertrüdingen
Pressurised flue gas systems for
multi-boiler systems, see page 128.
VITODENS