Santa Barbara County APCD Rule 352 352 - 1 September 16, 1999

RULE 352. NATURAL GAS-FIRED FAN-TYPE CENTRAL FURNACES AND RESIDENTIAL

WATER HEATERS. (Adopted September 16, 1999)

A. Applicability

This Rule applies to any person who supplies, sells, offers for sale, installs, or solicits the installation of

any natural gas-fired fan-type central furnaces or residential water heaters for use within the District.

B. Exemptions

The provisions of this Rule shall not apply to:

1. Units installed in manufactured housing (mobile homes).

2. Water heaters used exclusively in recreational vehicles.

3. Water heaters with a rated heat input of 75,000 British thermal units per hour or greater.

4. Water heaters used exclusively to heat swimming pools or hot tubs.

5. Fan-type central furnaces and residential water heaters using fuels other than natural gas.

C. Definitions

"Fan-Type Central Furnace" means 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 has a rated heat

input capacity of less than 175,000 British thermal units per hour and, for combination heating and

cooling units, a rated cooling capacity of less than 65,000 British thermal units per hour.

"Heat Output (Central Furnace)" means the product obtained by multiplying the annual fuel utilization

efficiency as defined by Section 10.1 of the Code of Federal Regulations (CFR), Title 10, Part 430,

Subpart B, Appendix N, by the rated heat input capacity of the natural gas-fired central furnace. 

"Heat Output (Water Heater)" means the product obtained by multiplying the recovery efficiency as

defined by Section 6.1.3 of 10 CFR 430, Subpart B, Appendix E, by the rated heat input capacity of the

water heater.

"Manufactured Home" has the same meaning as defined in 42 United States Code Section 5402 and

California Health and Safety Code Section 18007.

"Natural Gas" means a mixture of gaseous hydrocarbons containing at least 80% methane by volume as

determined by American Society for Testing and Materials Method D 1945-64.

"Rated Cooling Capacity" means the cooling capacity specified on the nameplate of the cooling unit. 

Cooling capacity is the amount of heat energy the cooling system can displace in one hour (British

thermal units per hour).

"Rated Heat Input Capacity" means the heat input capacity specified on the nameplate of the

combustion unit. Heat input is the amount of energy consumed in one hour (British thermal units per

hour).

"Water Heater" means a device that heats water at a thermostatically-controlled temperature of no more

than 210 degrees Fahrenheit for delivery on demand.
Santa Barbara County APCD Rule 352 352 - 2 September 16, 1999

D. Requirements – General

No person shall supply, sell, offer for sale, install, or solicit the installation of any natural gas-fired fantype central furnace or residential water heater for use within the District:

1. With emissions of oxides of nitrogen in excess of 40 nanograms per joule (0.093 pounds of

oxides of nitrogen per million British thermal units) of heat output.

2. That is not certified in accordance with Section E.

E. Requirements – Certification and Identification

1. Each appliance model shall be tested in accordance with Section F. In lieu of such certification

tests, the District will accept certifications issued under El Dorado County Air Pollution Control

District Rule 239; Kern County Air Pollution Control District Rule 424; Bay Area Air Quality

Management District Regulation 9, Rule 6 or Regulation 9, Rule 4; Placer County Air Pollution

Control District Rule 246; Sacramento Metropolitan Air Quality Management District Rule 414;

San Diego County Air Pollution Control District Rule 69.5 or Rule 69.6; San Joaquin Valley

Unified Air Pollution Control District Rule 4902; San Luis Obispo County Air Pollution Control

District Rule 428; South Coast Air Quality Management District Rule 1111 or Rule 1121,

Ventura County Air Pollution Control District Rule 74.11 or 74.22, or Yolo-Solano County Air

Pollution Control District Rule 2.37.

2. The central furnace manufacturer and water heater manufacturer shall display the model number

of the appliance complying with Section D.1 on the shipping carton and the rating plate of the

appliance. 

3. Upon request of the Control Officer, each manufacturer shall submit to the District a statement

confirming the appliance subject to this Rule is in compliance with the emission limit specified in

Section D.1. The statement shall be signed, dated, and shall attest to the accuracy of all

information. The statement shall include:

Name and address of manufacturer

Brand name

Model number, as it appears on the appliance rating plate

Heat input rating, British thermal units per hour

A source test report verifying compliance with Section D.1

F. Monitoring – Source Testing

1. During testing, each tested central furnace shall be operated in accordance with the procedures

specified in 10 CFR 430, Subpart B, Appendix N.

2. During testing, each water heater shall be operated in accordance with Section 2.4 of American

National Standards ANSI Z21.10.1-1998 at normal pressure, input rates, and with a five-foot

stack installed during the oxides of nitrogen emissions tests.

3. Compliance with the oxides of nitrogen emission requirement in D.1 shall be determined using

Air Resources Board Method 100, or Environmental Protection Agency Methods 7E and 3A.
Santa Barbara County APCD Rule 352 352 - 3 September 16, 1999

4. The following calculation shall be used to determine the nanograms of oxides of nitrogen per

joule of heat output:

H C E

P U

N

× ×

× × ×

=

4

4.566 10

where:

4.5466 x 104 = unit conversion factor [parts per million (ppm) to nanograms and British thermal

units to joules]

N = nanograms of emitted oxides of nitrogen per joule of heat output

P = concentration of oxides of nitrogen in flue gas in ppm by volume

U = dry volume percent of CO2 in flue gas necessary for stoichiometric combustion

H = gross heating value of fuel, British thermal units per cubic feet at 60°F and 30 inches of

mercury

C = measured dry volume percent of CO2 in the flue gas, assuming complete combustion and no

carbon monoxide present

E = efficiency, annual fuel utilization efficiency for natural gas-fired central furnaces or recovery

efficiency for water heaters as referenced in the Section C definitions for heat output (central

furnace) or heat output (water heater).

G. Compliance Schedule

All persons subject to this Rule shall comply on March 16, 2000.

H. Rule Effective Date

This Rule is effective on September 16, 1999.