Installation manual

RIVA PLUS COMBI MANUAL 19
9. Venting Cont.
In general, it has to be taken in to consideration that the horizontal sections of the
ue pipe must hand a horizontal slope not less than 1.5 degrees (0.3 inches per foot)
towards the boiler.
Separate 3.25/3.25 Restrictor Size Coaxial 2.5/4.0 Restrictor Size
From 3.30 to 49.2 ft (in+out) 55 From 0 to 3 ft (in+out) -
From 49.3 to 100 ft (in+out) No restrictor From 3.1 to 9 ft (in+out) No restrictor