Archgard 42-DVT40N - Manual (Page 15)

Northfire 42
15
VENTING - RESTRICTOR PLACEMENT
NOTE:
Vent restrictors are designed to reduce vertical stack action for vent
terminations which will reduce the velocity of incoming combustion air and
not adversely affect the standing pilot or the efficiency of the appliance.
RESTRICTOR PLACEMENT “FOR ROOFTOP VENTED APPLICATIONS ONLY”
WARNING:
These restrictors are only to be installed in the vent system if the vent exceeds 8’
in vertical height, *Restrictor Number 1 below is required and if the vent system
exceeds 15’ vertically, *Restrictor Number 2 below is Required. Installing them
under any other circumstances may cause hazardous venting conditions
and may result in personal injury, property damage or death.
“NOT FOR USE IN SIDEWALL VENTED APPLICATIONS”
Restrictor Number #1
Vertical Venting - Above
Eight Feet (8’)
Restrictor Number #2
Vertical Venting - Above
Fifteen Feet (15’)
Archgard System
Archgard System
In the Archgard system, the
restrictors are placed on the
exhaust outlet on the appliance.
Simpson Dura-Vent
Simpson Dura-Vent
With Simpson Dura-Vent,
locate the restrictor in the exhaust
section fitting into the formed lip.