SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT
RULE 1111 - NOx EMISSIONS FROM NATURAL GAS-FIRED, FAN-TYPE CENTRAL FURNACES
(Adopted December 1, 1978)(Amended July 8, 1983)
(A) an input rate of less than 175,000 BTU/hr; or
(B) for combination heating and cooling units, a cooling rate of less than 65,000 BTU/hr.
(A) not emit more than 40 nanograms of oxides of nitrogen (calculated as NO2) per joule of useful heat delivered to the heated space; and
(B) be certified in accordance with paragraph (c) of this rule.
(A) Oxides of nitrogen measurements, test equipment, and other required test procedures shall be in accordance with methods approved by the Executive Officer.
(B) Operation of the furnace shall be in accordance with the procedures specified in Section 3.1 of Code of Federal Regulations, Title 10, Part 430, Subpart B, Appendix N.
N = nanograms of emitted oxides of nitrogen per joule of useful heat.
P = concentration (ppm volume) of oxides of nitrogen in flue gas as tested.
U = volume percent CO2 in water-free flue gas for stoichiometric combustion.
H = gross heating value of fuel, BTU/cu.ft. (60oF, 30-in. Hg).
C = measured volume percent of CO2 in water-free flue gas, assuming complete combustion and no CO present.
E = AFUE, percent (calculated using Table 2).
Y = volume percent of O2 in flue gas.
Z = heating value of gas, joules/cu. meter (0.0oC, 1 ATM).
(A) A statement that the model is in compliance with subsection (b). (The statement shall be signed and dated, and shall attest to the accuracy of all statements.)
(B) General Information
(i) Name and address of manufacturer.
(ii) Brand name.
(iii) Model number, as it appears on the furnace rating plate.
(C) A description of the furnace and specifications for each model being certified.
The manufacturer shall display the model number of the furnace complying with subsection (b) on the shipping carton and rating plate.