Ordinance 531-78 - Laserfiche WebLink

j 1 TABLE 23-1 Combustion Air Requirements 2 For Gas Burning Water Heaters* 3 CONDITION 1 CONDITION 2 Minimum Total Area Minimum Total Area 4 of Ducts or Openings of Ducts or Openings 5 INPUT RATING** Where Floor Area of Where Floor Area of Compartment is Less Compartment is More 6 Than Twice the Floor Than Twice the Floor Area of the Appliances Area of All Appliances 7 Therein. Therein. 8 0-500,000 BTUs 2 sq. in. per 1,000 1 sq. in. per 1,000 BTUs BTUs 9 500,001 to 1,000 sq. in. plus 2 500 sq. in. plus 1 sq. 1,000,000 BTUs sq. in per 1,500 in. per 1,500 BTUs 10 BTUs over 500,000 over 500,000 BTUs BTUs 11 In excess of 1,666 sq. in plus 2 833 sq. in. plus 1 sq. 12 1,000,000 BTUs sq. in. per 2,000 in. per 2,000 BTUs BTUs over 1,000,000 over 1,000,000 13 BTUs BTUs 14 * For water heaters burning solid or liquid fuels, the required areas shall be one and one-half (1Y2) times that required for gas burning water heaters. 15 ** Minimum 100 sq. in. required equally divided top and bottom. 16 Section 2308 - Clearances 17 Uninsulated gas fired domestic water heaters shall not be installed closer than six (6) inches to any combustible wall, partition or door nor closer 18 than three (3) inches to any protected wall, partition or door. Insulated gas-fired domestic water heaters shall not be installed closer than two (2) 19 inches to any combustible wall, partition or door nor closer than one (1) inch to any protected wall, partition or door. The clearances may be 20 reduced for appliances which are designed and listed or approved for installation adjacent to combustible materials and installed in accordance 21 with the conditions of such approval. A protected wall will be considered as such if it has one-fourth (Y4) inch of asbestos, covered with a No. 26 22 gauge metal covering, or not less than one-hour fire resistive protection. 23 Section 2309 - Prohibited Locations 24 No water heater which depends on the combustion of fuel for heat shall be installed in any room used or designed to be used for sleeping purposes, 25 bathroom, clothes closet, or in any closet or other confined space opening into any bath or bedroom. 26 Exception: Sealed combustion chamber-type water heaters. 27 Where not prohibited by other regulations, water heaters may be located 28 under a stairway and landing. 29 Section 2310 - Protection from Damage 30 (a) Water heaters generating a glow, spark or flame capable or igniting flammable vapors may be installed in a residential 31 garage provided the pilots and burners, or heating elements and switches, are at least eighteen (18) inches above the 32 floor level. - 17 -