NOTE: Use only the approved materials listed on the previous page for direct venting of oil-fired Buderus G boilers. Use of any other materials, or systems not installed in accordance with the instructions contained in this manual will void the ITS listing. NOTE:Use strictly high temperature rated silicone (500 F rated silicone, GE. 106 or equivalent) and/or high temperature tape (360º F rated aluminum foil tape) for sealing at all exhaust pipe joints. Check all seams and joints of the exhaust venting for gas tightness. NOTE: Maintain clearances to combustibles as indicated in Table 1. Table 1: Boiler and exhaust vent pipe clearances to combustibles Front Side Rear Top Galv. Pipe Insul. Oil Vent 24" 6" 6" 6" 18" 1" Option 1: Aerocowl termination. Option 2: Concentric termination. Figure 4: Exhaust termination options. Option 1: Installation of the Aerocowl termination.