22
FIGURE 12B. DIRECT VENT, VERTICAL VENT TERMINATION WITH HORIZONTAL INTAKE.
FIGURE 12C. DIRECT VENT USING TWT WITH VERTICAL INTAKE.
Option B (Figures 11B & 11C)
assures no recirculation of flue gases.
70 EQUIVALENT FEET (27.4m)
OF VENTING (MAX.) AL 29-4C
®
HORIZONTAL AIR INTAKE
PVC PIPE 70
EQUIVALENT FEET (27.4m)
AIR INTAKE TERMINAL
NOTES:
• IF THE EXHAUST VENT TERMINAL IS WITHIN 10’ (3.0m)
OF A WALL OR A PARAPET, IT MIUST EXTEND A MINIMUM
OF 2’ (0.6m) ABOVE THE WALL OR PARAPET.
• ON SIDEWALL VENT INSTALLATION, REFER
TO 11A and 12 FOR SPACING SPECIFICATIONS
• FOR EXHAUST AND AIR INTAKE PIPE INSTALLATIONS
(CLEARANCES, SUPPORT, ETC.) REFER TO FIGURES
11 AND 11A.
VERTICAL AIR INTAKE MUST BE 12” (305mm)
ABOVE ANTICIPATED SNOW LEVEL.
PVC PIPE 70 EQUIVALENT FEET (27.4m)
100 EQUIVALENT FEET (27.4m)
OF VENTING (MAX.) AL 29-4C
®
NOTES:
• IF THE EXHAUST VENT TERMINAL IS WITHIN 10’ (3.0m)
OF A WALL OR A PARAPET, IT MIUST EXTEND A MINIMUM
OF 2’ (0.6m) ABOVE THE WALL OR PARAPET.
• ON SIDEWALL VENT INSTALLATION, REFER
TO 11A and 12 FOR SPACING SPECIFICATIONS
• FOR EXHAUST AND AIR INTAKE PIPE INSTALLATIONS
(CLEARANCES, SUPPORT, ETC.) REFER TO FIGURES
11 AND 11A.