Ordinance 349-75 - Laserfiche WebLink

• TABLE 13-1 Combustion Air Requirements For Gas-Burning Water Heaters * CONDITION 1 CONDITION 2 Minimum Total Area Minimum Total Area of Ducts or Open- of Ducts or Open- INPUT RATING ** ings Where Floor ings Where Floor Area of Compartment Area of Compartment is Less Than Twice is More Than Twice the Floor Area of the Floor Area of All Appliances All Appliances Therein Therein 0-500, 000 BTUs 2 sq. in. per 1 sq. in. per 1, 000 BTUs 1, 000 BTUs 500, 001 to 1, 000 sq. in. plus 500 sq. in. plus 1 1, 000, 000 BTUs 2 sq. in. per 1, 500 sq. in. per 1, 500 BTUs over 500, 000 BTUs over 500, 000 BTUs BTUs In excess of 1, 666 sq. in. plus 833 sq. in. plus 1 1, 000, 000 BTUs 2 sq. in. per 2, 000 sq. in. per 2 , 000 BTUs over 1, 000, 000 BTUs over 1, 000, 000 BTUs BTUs * For water heaters burning solid or liquid fuels, the re- quired areas shall be one and one-half (1-1/2) times that required for gas-burning water heaters. ** Minimum 100 sq. 'in. required equally divided top and bottom. Section 2309 - Clearances (a) Listed water heaters shall be installed in accordance with their listing and the manufacturer' s instruction. In no case shall the clearances be such as to interfere with combustion air, draft hood clearance and relief, and accessibility for servicing. (See Table 5. ) TABLE 5 MINIMUM CLEARANCES FOR LISTED WATER HEATERS Type Distance from Combustible Material of t Inches Heater Nearest Park of Jacket Flat Side Type A 6 . . - . Type B 2 . . . . Type C . . . . Flush Counter Type Unit - In accordance with manufacturer' s instructions. Type A - Miscellaneous (including circulating tank, instantaneous) . Type B - Underfired, insulated automatic storage heaters. Type C - Type B units specifically designed for installation in or beneath a counter. -7-