303.3.1.7 Clearances.
FGC § 303.3.1.7
Gas-fired direct vented appliances shall be installed with the following clearances: 1. Clearances from adjacent combustible surfaces shall meet the minimum clearances indicated by the manufacturer's instructions and the listing agency.
2.Clearances from adjacent openings or packaged terminal air conditioners (PTAC) and packaged terminal heat pumps (PTHP), the bottom of the vent terminal and the air intake shall be located at least 12 inches (304.8 mm) above finished ground level and in accordance with Table 303.3.1.7.
3.For all other equipment, all vent termination clearances from adjacent openings shall be in accordance with Section 503.8. Table 303.3.1.7PTAC and PTHP Vent Termination Clearance to Air Openings Appliance Input Rating(BTU per hour)Vent Termination Clearance to Any Air Opening Into Same or Adjacent Building(inches)10,000 or less6Over 10,000 but less than 50,000950,000 or over12 For SI: 1 inch = 25.4 mm, 1 British thermal unit per hour = 0.2931 W.
