Water Heater and Furnace Rules

New 28/10/2026

Find information about the Air District’s Water Heater and Furnace Rules, answers to common questions, and materials explaining adopted requirements and proposed changes.

Know the Facts website
Water Heater Rule Draft Amendments Overview(336 Kb PDF, 2 pgs, posted 17/07/2026)( English | Tagalog | Español | 中文 )
Myths vs. Facts(335 Kb PDF, 2 pgs, posted 01/09/2026)( English | Tagalog | Español | 中文 )
Frequently Asked Questions: Adopted Amendments to Rules 9-4 and 9-6(607 Kb PDF, 5 pgs, revised 14/07/2026)
Fact Sheet: Proposed Amendments to Rules 9-4 and 9-6(177 Kb PDF, 1 pg, revised 14/07/2026)

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Last Updated: 06/11/2026

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Water Heater and Furnace Rules

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