CALIFORNIA AIR RESOURCES BOARD 

SIP COMPLETENESS CHECKLIST 

(Electronic Format) 

*** TO BE COMPLETED BY DISTRICT AND RETURNED TO ARB *** 

All rules submitted to the EPA as State Implementation Plan (SIP) revisions must be supported by certain information 

and documentation for the rule packages to be deemed complete for review by the EPA. Rules will not be evaluated for 

approvability by the EPA unless the submittal packages are complete. To assist you in determining that all necessary 

materials are included in rules packages sent to the ARB for submittal to the EPA, please fill out the following form and 

include it with the rule package you send ARB. See the ARB's Guidelines on the Implementation of the 40 CFR 51, 

Appendix V, for a more detailed explanation than is provided here. Adopted rules and rule amendments should be 

checked against U.S. EPA's Guidance Document for Correcting Common VOC & Other Rule Deficiencies (Little Blue 

Book, August 21, 2001) to ensure that they contain no elements which will result in disapproval by EPA. 

District: SCAQMD

Rule No: 1111

Rule Title: Reduction of NOx Emissions from Natural Gas-Fired, Fan-Type Central Furnaces

Date Adopted or Amended: 11/06/2009

ADMINISTRATIVE MATERIALS 

Note: All documents should be in electronic format. Items that have signatures, initials, or stamps may be scanned. 

 Not 

Attached Attached N/A

 COMPLETE COPY OF THE RULE: Provide an unmarked copy of the entire 

rule as adopted or amended by your District Board. 

 UNDERLINE AND STRIKEOUT COPY OF THE RULE: If an amended rule, 

provide a complete copy of the rule indicating in underline and strikeout 

format all language which has been added, deleted, or changed since the rule 

was last adopted or amended. 

 COMPLETE COPY OF THE REFERENCED RULE(S): For any rule which 

includes language specifically referencing another rule, a copy of that other 

rule must also be submitted, unless it has already been submitted to EPA as 

part of a previous SIP submittal. 

 PUBLIC NOTICE EVIDENCE: Include a copy of the local newspaper clipping 

certification(s), stating the date of publication, which must be at least 30 days 

before the hearing. As an alternative, include a copy of the actual published 

notice of the public hearing as it appeared in the local newspaper(s). In this 

case, however, enough of the newspaper page must be included to show the 

date of publication. The notice must specifically identify by title and number 

each rule adopted or amended. 

 RESOLUTION/MINUTE ORDER: Provide the Board Clerk certified resolution 

or minute order. This document must include certification that the hearing 

was held in accordance with the information in the public notice. It must also 

list the rules that were adopted or amended, the date of the public hearing, 

and a statement of compliance with California Health and Safety Code 

Sections 40725-40728 (Administrative Procedures Act). 

 PUBLIC COMMENTS AND RESPONSES: Submit copies of written public 

comments made during the notice period and at the public hearing. Also 

submit any written responses prepared by the District staff or presented to the 

District Board at the public hearing. A summary of the public comments and 

responses is adequate. If there were no comments made during the notice 

period or at the hearing, please indicate N/A to the left. 
 

5/1/2002 

CALIFORNIA AIR RESOURCES BOARD 

SIP COMPLETENESS CHECKLIST 

(Electronic Format)

TECHNICAL MATERIALS 

Note: All documents and forms should be in electronic format. 

 Not 

Attached Attached N/A

 RULE EVALUATION FORM: See instructions for completing the Rule 

Evaluation Form and the accompanying sample form. 

 NON-EPA TEST METHODS: Attach all test methods that are referenced in 

your rule that do not appear in 40 CFR 51, 60, 61, 63, or have not been 

previously submitted to EPA. EPA methods used in other media such as 

SW846 for solid waste are not automatically approved for air pollution 

applications. Submittal of test methods that are not EPA-approved should 

include the information and follow the procedure described in Region 9’s 

“Test Method Review & Evaluation Process.” 

 MODELING SUPPORT: Provide if appropriate. In general, modeling support 

is not required for VOC and NOx rules to determine their impacts on ozone 

levels. Modeling is required where a rule is a relaxation that affects large 

sources (> 100 TPY) in an attainment area for SO2, directly emitted PM10, 

CO, or NOx (for NO2 purposes). In cases where EPA is concerned with the 

impact on air quality of rule revisions which relax limits or cause a shift in 

emission patterns in a nonattainment area, a reference back to the approved 

SIP will be sufficient provided the approved SIP accounts for the relaxation 

and provided the approved SIP used the current EPA modeling guidelines. If 

current EPA modeling guidelines were not used, then new modeling may be 

required. 

 ECONOMIC AND TECHNICAL JUSTIFICATION FOR DEVIATIONS FROM 

EPA POLICIES: The District staff report or other information included with 

the submittal should discuss all potential relaxations or deviations from RACT, 

RACM, BACT, BACM, enforceability, attainment, RFP, or other relevant EPA 

requirements. This includes, for example, demonstrating that exemptions or 

emission limits less stringent than the presumptive RACT (e.g., a CTG) meet 

EPA’s 5 percent policy, and demonstrating that all source categories 

exempted from a RACM/BACM rule are de minimus according to EPA’s 

RACM/BACM policy. 

 ADDITIONAL MATERIALS: Provide District staff reports and any other 

supporting information concerning development of the rule or rule changes. 

This information should explain the basis for all limits and thresholds 

contained in the rule. 
CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM – Page 1 

(Electronic Format) 

I. GENERAL INFORMATION

District: SCAQMD

Rule No(s): 1111 Date adopted/Amended/Rescinded: 11/06/2009

Rule Title(s): Rule 1111 -- Reduction of NOx Emissions from Natural Gas-Fired, Fan-Type Central Furnaces

Date Submitted to ARB: January 7, 2010

If an Amended Rule, Date Last Amended (or Adopted): July 8, 1983

Is the Rule Intended to be Sent to the U.S. EPA as a SIP Revision? Yes No (If No, do not complete remainder of form)

District Contact: Joe Cassmassi Phone Number: 909-396-3155 E-mail Address: JCassmassi@aqmd.gov

Narrative Summary of New Rule or Rule Changes: New Rule Amended Rule 

This new rule reduces nitrogen oxide emissions from natural gas-fired, fan-type central heating furnaces used in 

residences and small commercial buildings. The rule implements Control Measure CMB-03 – Further NOx 

Reductions from Residential Heating Furnaces of the 2007 AQMP.

Pollutant(s) Regulated by the Rule (Check): ROG (NOx) SO2 

 (CO) PM TAC (name): 

II. EFFECT ON EMISSIONS

Complete this section ONLY for rules that, when implemented, will result in quantifiable changes in emissions. Attach reference(s) for emission factor(s) 

and other information. Attach calculation sheet showing how the emission information provided below was determined. 

Net Effect on Emissions: Increase* Decrease** N/A 

Emission Reduction Commitment in SIP for this Source Category: Rule 1111 has not been amended since 1983. Control 

Measure CMB-03 – Further NOx Reductions from Residential Heating Furnaces of the 2007 AQMP projected an 

annual average NOx emission reduction of 0.8 tons/day in 2014 and 3.3 tons/day in 2023 from projected inventories 

for this category of 10.5 tons/day in 2014 and 11.1 tons/day in 2023.

Inventory Year Used to Calculate Changes in Emissions: 2014 Area Affected: SCAQMD

Future Year Control Profile Estimate (Provide information on as many years as possible): 

(Annual Average – 2014 Baseline – 2007 AQMP)

 Tons/Year Baseline 

 Reductions Tons/Year Annual Cumulative Cumulative Control

Year (Increases) Subject to Rule Control Control Factor __

2012 0.005 / 10.5 = 0.0 0.0 1.00 -- 0.0 = 1.0

2014 0.09 / 10.5 = 0.01 0.01 1.00 -- 0.01 = 0.99

2015 0.36 / 10.5 = 0.02 0.03 1.00 -- 0.03 = 0.97

2016 0.66 / 10.5 = 0.03 0.06 1.00 -- 0.06 = 0.94

2018 1.26 / 10.5 = 0.09 0.12 1.00 -- 0.12 = 0.88

2023 3.0 / 11.1 * = 0.27 0.27 1.00 -- 0.73 = 0.73

____________________________________________________________________________________

*2023 Projected Baseline in 2007 AQMP
 

CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM - Page 2 

(Electronic Format) 

Baseline Inventory in the SIP for the Control Measure: 10.5 tons/day in 2014 and 11.1 tons/day in 2023

Emissions Reduction Commitment in the SIP for the Control Measure: Control Measure CMB-03 – Further NOx 

Reductions from Residential Heating Furnaces of the 2007 AQMP projected an annual average NOx emission reduction 

of 0.8 tons/day in 2014 and 3.3 tons/day in 2023 from projected inventories for this category of 10.5 tons/day in 2014 and 

11.1 tons/day in 2023.

Revised Baseline Inventory (if any): 

Revised Emission Reduction Estimate (if developed): 0.1 ton/day in 2014 and 3.0 tons/day in 2023

Note that the district’s input to the Rule Evaluation Form will not be used as input to the ARB’s emission forecasting and 

planning. 

III. SOURCES/ATTAINMENT STATUS

District is: Attainment Nonattainment Split 

Approximate Total Number of Small (<100 TPY) Sources Affected by this Amendment: Area Source

Percent in Nonattainment Area: 100% 

Number of Large (> 100 TPY) Sources Controlled: 0 Percent in Nonattainment Area: 0% 

Name(s) and Location(s) (city and county) of Large (> 100 TPY) Sources Controlled by Rule (Attach additional sheets as 

necessary): N/A

IV. EMISSION REDUCTION TECHNOLOGY

Does the Rule Include Emission Limits that are Continuous? Yes No 

If Yes, Those Limits are in Section(s) (c) of the Rule. 

Other Methods in the Rule for Achieving Emission Reductions are: N/A

V. OTHER REQUIREMENTS

The Rule Contains: 

Emission Limits in Section(s): (c) Work Practice Standards in Section(s): (c),(d),(e)

Recordkeeping Requirements in Section(s): (d),(e),(h) Reporting Requirements in Section(s): (d),(h)
 

5/1/2002 

CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM - Page 3 

(Electronic Format) 

VI. IMPACT ON AIR QUALITY PLAN

 No Impact Impacts RFP Impacts attainment 

Discussion: Amended Rule 1111 will reduce emissions of NOx and help achieve compliance with ambient air quality 

standards for ozone and particulate matter. 






1111 - 1 

(Adopted December 1, 1978)(Amended July 8, 1983)(Amended November 6, 2009)

RULE 1111. REDUCTION OF NOx EMISSIONS FROM NATURAL-GASFIRED, FAN-TYPE CENTRAL FURNACES

(a) Purpose and Applicability

 The purpose of this rule is to reduce NOx emissions from natural gas-fired, fantype central furnaces, as defined in this rule. This rule applies to manufacturers, 

distributors, sellers and installers of residential and commercial fan-type central 

furnaces, requiring either single-phase or three-phase electric supply, used for 

comfort heating with a rated heat input capacity of less than 175,000 BTU per 

hour;, or, for combination heating and cooling units, a cooling rate of less than

65,000 BTU per hour. 

(ab) Definitions 

(1) ANNUAL FUEL UTILIZATION EFFICIENCY (AFUE) is defined in 

Section 10.1 of Code of Federal Regulations, Title 10, Part 430, Subpart 

B, Appendix N.

(2) BTU means British thermal unit or units.

(3) CONDENSING FURNACE means a high-efficiency furnace that uses a 

second heat exchanger to extract the latent heat in the flue gas by cooling 

the combustion gasses to near ambient temperature so that water vapor 

condenses in the heat exchanger, is collected and drained.

(14) FAN TYPE CENTRAL FURNACEan Type Central Furnace is a selfcontained space heater providing for circulation of heated air at pressures 

other than atmospheric through ducts more than 10 inches in length that 

have: 

(A) an input rate RATED HEAT INPUT CAPACITY of less than 

175,000 BTU/ per hour; or 

(B) for combination heating and cooling units, a cooling rate of less 

than 65,000 BTU/ per hour. 

(2) Annual Fuel Utilization Efficiency (AFUE) is defined in Section 4.2.35 of 

Code of Federal Regulations, Title 10, Part 430, Subpart B, Appendix N.

(5) HEAT INPUT means the higher heating value of the fuel to the furnace

measured as BTU per hour. 
Rule 1111 (Cont.) (Amended November 6, 2009) 

1111 - 2

(6) NOx EMISSIONS means the sum of nitrogen oxide and nitrogen dioxide

(oxides of nitrogen) in the flue gas, collectively expressed as nitrogen 

dioxide. 

(7) RATED HEAT INPUT CAPACITY means the gross HEAT INPUT of the 

combustion device. 

(8) RESPONSIBLE OFFICIAL means: 

(A) For a corporation: a president or vice-president of the corporation 

in charge of a principal business function or a duly authorized 

person who performs similar policy-making functions for the 

corporation, or 

(B) For a partnership or sole proprietorship: general partner or 

proprietor, respectively,. 

(9) SINGLE FIRING RATE means the burners and control system are 

designed to operate at only one fuel input rate and the control system 

cycles burners between the maximum heat output and no heat output.

(310) USEFUL HEAT DELIVERED TO THE HEATED SPACEseful Heat 

Delivered to the Heated Space is the AFUE (expressed as a fraction) 

multiplied by the heat input. 

(11) VARIABLE FIRING RATE means the burners and control system are

designed to operate at more than one fuel input rate and the control system 

cycles burners between two or more heat output rates and no heat output.

(12) WEATHERIZED means designed for installation outside of a building, 

equipped with a protective jacket and integral venting, and labeled for 

outdoor installation.

(bc) Requirements 

(1) A manufacturer shall not, after January 1, 1984, manufacture or supply for 

sale or use in the South Coast Air Quality Management District naturalgas-fired, fan-type central furnaces, unless such furnaces meet the 

requirements of subparagraph (c)(3). 

(2) A person shall not, after April 2, 1984, sell or offer for sale within the 

South Coast Air Quality Management District natural-gas-fired, fan-type 

central furnaces unless such furnaces meet the requirements of 

subparagraph (c)(3). 
Rule 1111 (Cont.) (Amended November 6, 2009) 

1111 - 3

(3) Natural-gas-fired, fan-type central furnaces shall: 

(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 subdivision (cd) of this 

rule. 

(4) On or after October 1, 2012, a person shall not manufacture, supply, sell, 

offer for sale, or install, for use in the South Coast Air Quality 

Management District, natural-gas-fired, fan-type central furnaces subject 

to this rule, unless such furnace complies with the applicable emission 

limit and compliance date set forth in Table 1 and is certified in 

accordance with subdivision (d) of this rule. 

Table 1 – Furnace NOx Limits and Compliance Schedule

* Nanograms of oxides of nitrogen (calculated as NO2) per joule of useful heat delivered to the 

heated space

(cd) Certification 

(1) The manufacturer shall have each appliance model tested in accordance 

with the following: 

(A) Oxides of nitrogen measurements, test equipment, and other 

required test procedures shall be in accordance with methods 

approved by the Executive Officer AQMD Method 100.1. 

(B) Operation of the furnace shall be in accordance with the procedures 

specified in Section 3.14.0 of Code of Federal Regulations, Title 

10, Part 430, Subpart B, Appendix N. 

Compliance Date Equipment Category NOx Emission Limit 

(nanograms/Joule *)

October 1, 2012 Mobile Home Furnace 40

October 1, 2014 Condensing Furnace 14

October 1, 2015 Non-condensing Furnace 14

October 1, 2016 Weatherized Furnace 14

October 1, 2018 Mobile Home Furnace 14
Rule 1111 (Cont.) (Amended November 6, 2009) 

1111 - 4

(2) One of the two formulas shown below shall be used to determine the 

nanograms of oxides of nitrogen per joule of useful heat delivered to the 

heated space: 

 N = 4.566 x 104 x P x U, N = 3.655 x 1010 x P

 H x C x E (20.9-Y) x Z x E 

 Where: 

 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). 

(3) At least 120 days prior to the date a furnace model is first shipped to a 

location in the AQMD for use in the District, Tthe manufacturer shall 

submit to the Executive Officer the following: 

(A) A statement that the model is in compliance with 

subsectiondivision (bc). (The statement shall be signed by a 

responsible official 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. 
Rule 1111 (Cont.) (Amended November 6, 2009) 

1111 - 5

(D) Executive Officer approved emission test protocol and emission 

test results verifying compliance with the applicable NOx limit 

specified in Table 1.

(de) Identification of Compliant Units

(1) The manufacturer shall display the model number of the furnace 

complying with subsectiondivisions (bc) and (d) shall display the 

following on the shipping cartonontainer label and rating plate. of the 

furnace: 

(A) Model number;

(B) Heat input capacity;

(C) Applicable NOx emission levellimit in Table 1; and

(D) Date of manufacture or date code.

(2) Any non-certified furnace shipped to a location in the South Coast Air 

Quality Management District for distribution or sale outside of the District 

shall have a label on the shipping container identifying the furnace as not 

certified for use in the District.

(ef) Enforcement 

(1) The Executive Officer may require the emission test results to be provided 

when deemed necessary to verify compliance.

(2) The Executive Officer may periodically conduct such tests as are deemed 

necessary to insureensure compliance with subsectiondivision (bc), (d), (e) and 

(h). 

(fg) Exemptions 

(1) The provisions of this rule shall not apply to furnaces installed in mobile 

homes before October 1, 2012. 

(2) The provisions of this rule shall not apply to natural-gas-fired, fan-type 

central furnaces utilizing three-phase electrical current until January 1, 

1986.

(2) For furnaces manufactured, purchased and delivered to the South Coast 

Air Quality Management District prior to the applicable compliance date 

in Table 1, any person may, until 300 days after the applicable compliance 

date, sell, offer for sale, or install such a furnace in the District, so long as 
Rule 1111 (Cont.) (Amended November 6, 2009) 

1111 - 6

the furnace meets the requirements of paragraph (c)(3) and subdivisions 

(d) and (e).

(h) Rebate Incentives for Early Compliance

Any manufacturer of natural gas-fired, fan-type central furnaces subject to this 

rule that distributes and sells into the District furnaces that comply with the 14 

nanograms/Joule emission limit 90 days prior to the applicable compliance date in 

Table 1 of paragraph (c)(4) may submit a compliance plan for early compliance to 

the Executive Officer and to receive on a first-come first-served basis from the 

AQMD a rebate payment of $75 for each 14 nanograms/Joule certified furnace 

and $90 for each high efficiency 14 nanograms/Joule certified furnace with AFUE 

of 90% or greater distributed and sold into the District, provided funds are 

available on the date documentation on the number of units distributed and sold is 

submitted to the AQMD. Total rebate payments to all manufacturers shall not 

exceed $3,000,000.

(i) Technology Assessment

On or before April 1, 2013, the Executive Officer shall conduct a technology 

assessment and shall report to the Governing Board on the status of 

manufacturers’ progress towards compliance with the 14 nanograms/Joule 

emission limit for nitrogen oxidees. 
1111 - 1 

(Adopted December 1, 1978)(Amended July 8, 1983)(Amended November 6, 2009)

RULE 1111. REDUCTION OF NOx EMISSIONS FROM NATURAL-GASFIRED, FAN-TYPE CENTRAL FURNACES

(a) Purpose and Applicability 

 The purpose of this rule is to reduce NOx emissions from natural gas-fired, fantype central furnaces, as defined in this rule. This rule applies to manufacturers, 

distributors, sellers and installers of residential and commercial fan-type central 

furnaces, requiring either single-phase or three-phase electric supply, used for 

comfort heating with a rated heat input capacity of less than 175,000 BTU per 

hour, or, for combination heating and cooling units, a cooling rate of less than 

65,000 BTU per hour. 

(b) Definitions 

(1) ANNUAL FUEL UTILIZATION EFFICIENCY (AFUE) is defined in 

Section 10.1 of Code of Federal Regulations, Title 10, Part 430, Subpart 

B, Appendix N. 

(2) BTU means British thermal unit or units. 

(3) CONDENSING FURNACE means a high-efficiency furnace that uses a 

second heat exchanger to extract the latent heat in the flue gas by cooling 

the combustion gasses to near ambient temperature so that water vapor 

condenses in the heat exchanger, is collected and drained. 

(4) FAN TYPE CENTRAL FURNACE is a self-contained space heater 

providing for circulation of heated air at pressures other than atmospheric 

through ducts more than 10 inches in length that have: 

(A) a RATED HEAT INPUT CAPACITY of less than 175,000 BTU 

per hour; or 

(B) for combination heating and cooling units, a cooling rate of less 

than 65,000 BTU per hour. 

(5) HEAT INPUT means the higher heating value of the fuel to the furnace 

measured as BTU per hour. 

(6) NOx EMISSIONS means the sum of nitrogen oxide and nitrogen dioxide 

(oxides of nitrogen) in the flue gas, collectively expressed as nitrogen 

dioxide. 
Rule 1111 (Cont.) (Amended November 6, 2009) 

1111 - 2

(7) RATED HEAT INPUT CAPACITY means the gross HEAT INPUT of the 

combustion device. 

(8) RESPONSIBLE OFFICIAL means: 

(A) For a corporation: a president or vice-president of the corporation 

in charge of a principal business function or a duly authorized 

person who performs similar policy-making functions for the 

corporation, or 

(B) For a partnership or sole proprietorship: general partner or 

proprietor, respectively. 

(9) SINGLE FIRING RATE means the burners and control system are 

designed to operate at only one fuel input rate and the control system 

cycles burners between the maximum heat output and no heat output. 

(10) USEFUL HEAT DELIVERED TO THE HEATED SPACE is the AFUE 

(expressed as a fraction) multiplied by the heat input. 

(11) VARIABLE FIRING RATE means the burners and control system are 

designed to operate at more than one fuel input rate and the control system 

cycles burners between two or more heat output rates and no heat output. 

(12) WEATHERIZED means designed for installation outside of a building, 

equipped with a protective jacket and integral venting, and labeled for 

outdoor installation. 

(c) Requirements 

(1) A manufacturer shall not, after January 1, 1984, manufacture or supply for 

sale or use in the South Coast Air Quality Management District naturalgas-fired, fan-type central furnaces, unless such furnaces meet the 

requirements of paragraph (c)(3). 

(2) A person shall not, after April 2, 1984, sell or offer for sale within the 

South Coast Air Quality Management District natural-gas-fired, fan-type 

central furnaces unless such furnaces meet the requirements of paragraph 

(c)(3). 

(3) Natural-gas-fired, fan-type central furnaces shall: 

(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 subdivision (d) of this rule. 
Rule 1111 (Cont.) (Amended November 6, 2009) 

1111 - 3

(4) On or after October 1, 2012, a person shall not manufacture, supply, sell, 

offer for sale, or install, for use in the South Coast Air Quality 

Management District, natural-gas-fired, fan-type central furnaces subject 

to this rule, unless such furnace complies with the applicable emission 

limit and compliance date set forth in Table 1 and is certified in 

accordance with subdivision (d) of this rule. 

Table 1 – Furnace NOx Limits and Compliance Schedule 

* Nanograms of oxides of nitrogen (calculated as NO2) per joule of useful heat delivered to the 

heated space 

(d) Certification 

(1) The manufacturer shall have each appliance model tested in accordance 

with the following: 

(A) Oxides of nitrogen measurements, test equipment, and other 

required test procedures shall be in accordance with AQMD 

Method 100.1. 

(B) Operation of the furnace shall be in accordance with the procedures 

specified in Section 4.0 of Code of Federal Regulations, Title 10, 

Part 430, Subpart B, Appendix N. 

(2) One of the two formulas shown below shall be used to determine the 

nanograms of oxides of nitrogen per joule of useful heat delivered to the 

heated space: 

 N = 4.566 x 104 x P x U, N = 3.655 x 1010 x P

 H x C x E (20.9-Y) x Z x E 

Compliance Date Equipment Category NOx Emission Limit 

(nanograms/Joule *) 

October 1, 2012 Mobile Home Furnace 40 

October 1, 2014 Condensing Furnace 14 

October 1, 2015 Non-condensing Furnace 14 

October 1, 2016 Weatherized Furnace 14 

October 1, 2018 Mobile Home Furnace 14 
Rule 1111 (Cont.) (Amended November 6, 2009) 

1111 - 4

 Where: 

 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). 

(3) At least 120 days prior to the date a furnace model is first shipped to a 

location in the AQMD for use in the District, the manufacturer shall 

submit to the Executive Officer the following: 

(A) A statement that the model is in compliance with subdivision (c). 

(The statement shall be signed by a responsible official 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. 

(D) Executive Officer approved emission test protocol and emission 

test results verifying compliance with the applicable NOx limit 

specified in Table 1. 

(e) Identification of Compliant Units 

(1) The manufacturer of the furnace complying with subdivisions (c) and (d) 

shall display the following on the shipping container label and rating plate 

of the furnace: 

(A) Model number; 
Rule 1111 (Cont.) (Amended November 6, 2009) 

1111 - 5

(B) Heat input capacity; 

(C) Applicable NOx emission limit in Table 1; and 

(D) Date of manufacture or date code. 

(2) Any non-certified furnace shipped to a location in the South Coast Air 

Quality Management District for distribution or sale outside of the District 

shall have a label on the shipping container identifying the furnace as not 

certified for use in the District. 

(f) Enforcement 

The Executive Officer may periodically conduct such tests as are deemed 

necessary to ensure compliance with subdivision (c), (d), (e) and (h). 

(g) Exemptions 

(1) The provisions of this rule shall not apply to furnaces installed in mobile 

homes before October 1, 2012. 

(2) For furnaces manufactured, purchased and delivered to the South Coast 

Air Quality Management District prior to the applicable compliance date 

in Table 1, any person may, until 300 days after the applicable compliance 

date, sell, offer for sale, or install such a furnace in the District, so long as 

the furnace meets the requirements of paragraph (c)(3) and subdivisions 

(d) and (e). 

(h) Rebate Incentives for Early Compliance 

Any manufacturer of natural gas-fired, fan-type central furnaces subject to this 

rule that distributes and sells into the District furnaces that comply with the 14 

nanograms/Joule emission limit 90 days prior to the applicable compliance date in 

Table 1 of paragraph (c)(4) may submit a compliance plan for early compliance to 

the Executive Officer and to receive on a first-come first-served basis from the 

AQMD a rebate payment of $75 for each 14 nanograms/Joule certified furnace 

and $90 for each high efficiency 14 nanograms/Joule certified furnace with AFUE 

of 90% or greater distributed and sold into the District, provided funds are 

available on the date documentation on the number of units distributed and sold is 

submitted to the AQMD. Total rebate payments to all manufacturers shall not 

exceed $3,000,000. 
Rule 1111 (Cont.) (Amended November 6, 2009) 

1111 - 6

(i) Technology Assessment 

On or before April 1, 2013, the Executive Officer shall conduct a technology 

assessment and shall report to the Governing Board on the status of 

manufacturers’ progress towards compliance with the 14 nanograms/Joule 

emission limit for nitrogen oxides.