CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM -- Page 1

(Electronic Format) 

I. GENERAL INFORMATION 

District: SJVUAPCD 

Rule No(s): 4905 Date adopted/Amended/Rescinded: January 22, 2015 

Rule Title(s): Natural Gas-Fired, Fan-Type Central Furnaces 

Date Submitted to ARB: 

If an Amended Rule, Date Last Amended (or Adopted): October 20, 2005 

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: Jesse Madsen Phone Number: (559) 230-6100 E-mail Address: jesse.madsen@valleyair.org 

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

Amendments to Rule 4905 satisfy control measure commitments included in the District's 2008 PM2.5 Plan, 2012 

PM2.5 Plan, and 2013 Plan for the Revoked 1-Hour Ozone Standard. Amendments to Rule 4905 lowered the 

NOx emission limit for residential units, and expanded the rule applicability to include commercial units and units 

installed in manufactured homes. Amendments also added clarifying language, removed expired and redundant 

language, added labeling requirements, and added an option for manufacturers to pay an emission fee to sell noncompliant units for up to three years. Details of the adopted changes are in the final staff report. 

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: N/A 

Inventory Year Used to Calculate Changes in Emissions: 2017 Area Affected: SJV Air Basin 

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

Emissions inventory was modified to include additional sources (see final staff report for details). The revised baseline 

inventory is the residential inventory (2.54 tpd in 2017) plus the net commercial inventory (.75 tpd in 2017), which totals 

3.29 tpd in 2017. Future year control profile is the adjusted baseline minus the emissions reduced (0.105 tpd annual 

reductions). 2017: 3.18, 2018: 3.13, 2019: 3.06, 2020: 3.01, 2021: 2.94, 2026: 2.64, 2031: 2.34, 2036: 2.06. 
CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM -- Page 2

(Electronic Format) 

Baseline Inventory in the SIP for the Control Measure: 2.54 tpd NOx 

Emissions Reduction Commitment in the SIP for the Control Measure: no emission reduction commitment 

Revised Baseline Inventory (if any): 3.29 tpd NOx 

Revised Emission Reduction Estimate (if developed): N/A 

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: N/A

Percent in Nonattainment Area: N/A% 

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

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) 5.0 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): 5.0 Work Practice Standards in Section(s): N/A 

Recordkeeping Requirements in Section(s): 6.0 Reporting Requirements in Section(s): 6.0 
CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM -- Page 3

(Electronic Format) 

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VI. IMPACT ON AIR QUALITY PLAN 

 No Impact Impacts RFP Impacts attainment 

Discussion: Rule amendments lower the NOx emission limit for residential units from 40 ng/J to 14 ng/J, and add NOx 

emission limits of 40 ng/J for units installed in manufactured homes and 14 ng/J for units installed in commercial buildings. 

The amended NOx emission limits would be effective February 1, 2015 for units installed in manufactured homes, April 1, 

2015 for condensing units (residential and commercial), October 1, 2015 for non-condensing units (residential and 

commercial), and October 1, 2016 for weatherized units (residential and commercial). Additionally the NOx emission limit 

for units installed in manufactured homes will be lowered to 14 ng/J, effective October 1, 2018. Amendments allow the 

sale of non-compliant units during the initial implementation period (36 months) in exchange for the payment of an 

emissions fee for each non-compliant unit sold. Total emission reductions will be 2.10 tpd upon full turnover of existing 

units in 2036.