11Quadra-Fire • Expression 36 (QV36A-FB) • 2062-900 Rev. Q • 2/10A. Vent Termination Minimum ClearancesFire Risk.Explosion Risk.Maintain vent clearance to combustibles asspecified.• Do not pack air space with insulation or othermaterials.Failure to keep insulation or other materialsaway from vent pipe may cause fire.Roof Pitch H (Min.) Ft.Flat to 6/12...........................................................1.0*Over 6/12 to 7/12 .................................................1.25*Over 7/12 to 8/12 .................................................1.5*Over 8/12 to 9/12 .................................................2.0*Over 9/12 to 10/12 ...............................................2.5Over 10/12 to 11/12 .............................................3.25Over 11/12 to 12/12 .............................................4.0Over 12/12 to 14/12 .............................................5.0Over 14/12 to 16/12 .............................................6.0Over 16/12 to 18/12 .............................................7.0Over 18/12 to 20/12 .............................................7.5Over 20/12 to 21/12 .............................................8.0Figure 4.1Figure 4.2 Minimum height from roof to lowest dischargeopening44 Termination LocationsMeasure horizontal clearances from this surface.Measure vertical clearances from this surface.Figure 4.3 Multiple Vertical TerminationFigure 4.2 specifies minimum vent heights for variouspitched roofs.(See Figure 4.4 for specific clearances)* 3 foot minimum in snow regionsHORIZONTALOVERHANGVERTICALWALLGAS DIRECT VENTTERMINATION CAP12XROOF PITCHIS X/ 12LOWESTDISCHARGEOPENING2 FT.MIN. 20 INCHES MIN.H (MIN.) - MINIMUM HEIGHT FROM ROOFTO LOWEST DISCHARGE OPENINGGas, Wood or Fuel OilTermination CapBGasTerminationCap **A** If using decorative cap cover(s), this distance may need to beincreased. Refer to the installation instructions supplied with thedecorative cap cover.** In a staggered installation with both gas and wood terminations, thewood termination cap must be higher than the gas termination cap.A B6 in. (minimum) up to 20 in.152 mm/508 mm18 in. minimum457 mm20 in. and over 0 in. minimumWARNINGFire Risk.Explosion Risk.Inspect external vent cap regularly.• Ensure no debris blocks cap.• Combustible materials blocking cap mayignite.• Restricted air flow affects burner operation.WARNING