Riello Array AR 2000 Installation And Operation Manual page 63

APPENDIX
Y
Horizontal venting system (sealed combustion):
X ≥ 4" (102 mm);
Y ≥ 12" (305 mm)
Air intake
Multiple air and vent vertical termination:
X ≥ 12" (305 mm);
Y ≥ 12" (305 mm)
X
Air intake
Vent
Vent
X
X
X
Y
Vertical venting system (sealed combustion):
X > 12" (305 mm)
Y = 12" (305 mm) above maximum snow level or at least 24"
whichever is greater
Y
Vent
X
Multiple air and vent vertical termination:
X ≥ 12" (305 mm);
Y ≥ 12" (305 mm)
63 63
X
Y
Air intake
Vent
Air intake
SHUTDOWN APPENDIX
Y