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Chapter 3 — NONRESIDENTIAL, HOTEL/MOTEL OCCUPANCIES, AND COVERED PROCESSES—MANDATORY REQUIREMENTS

Section 120.0 — GENERAL

2025 California Energy Code (Title 24, Part 6) · 2025 edition · updated 2026-07-25 · California

Sections 120.1 through 120.10 establish requirements for the design and installation of building envelopes, ventilation, space-conditioning and service water-heating systems and equipment in nonresidential and hotel/motel buildings as well as covered processes that are within the scope of Section 100.0(a).

Note: The requirements of Sections 120.1 through 120.10 apply to newly constructed buildings. Section 141.0 specifies which requirements of Sections 120.1 through 120.10 also apply to additions or alterations to existing buildings.

Note: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code . Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.

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▸ Contents — 2025 California Energy Code (Title 24, Part 6)
2025 California Energy Code (Title 24, Part 6)
  1. Chapter 1 — ALL OCCUPANCIES—GENERAL PROVISIONS
  2. Chapter 2 — ALL OCCUPANCIES—MANDATORY REQUIREMENTS FOR THE MAN…
  3. ▸ Chapter 3 — NONRESIDENTIAL, HOTEL/MOTEL OCCUPANCIES, AND COVER…
    Overview
    1. Section 120.0 — GENERAL
    2. Section 120.1 — REQUIREMENTS FOR VENTILATION AND INDOOR AIR QU…
    3. Section 120.2 — REQUIRED CONTROLS FOR SPACE-CONDITIONING SYSTEMS
    4. Section 120.3 — REQUIREMENTS FOR PIPE INSULATION
    5. Section 120.4 — REQUIREMENTS FOR AIR DISTRIBUTION SYSTEM DUCTS…
    6. Section 120.5 — REQUIRED NONRESIDENTIAL MECHANICAL SYSTEM ACCE…
    7. Section 120.6 — MANDATORY REQUIREMENTS FOR COVERED PROCESSES
    8. Section 120.7 — MANDATORY REQUIREMENTS FOR BUILDING ENVELOPES
    9. Section 120.8 — NONRESIDENTIAL BUILDING COMMISSIONING
    10. Section 120.9 — MANDATORY REQUIREMENTS FOR COMMERCIAL BOILERS
    11. Section 120.10 — MANDATORY REQUIREMENTS FOR FANS
  4. Chapter 4 — NONRESIDENTIAL AND HOTEL/MOTEL OCCUPANCIES—MANDATO…
  5. Chapter 5 — NONRESIDENTIAL AND HOTEL/MOTEL OCCUPANCIES—PERFORM…
  6. Chapter 6 — NONRESIDENTIAL AND HOTEL/MOTEL OCCUPANCIES—
  7. Chapter 7 — SINGLE-FAMILY RESIDENTIAL BUILDINGS—
  8. Chapter 8 — SINGLE-FAMILY RESIDENTIAL BUILDINGS—PERFORMANCE AN…
  9. Chapter 9 — SINGLE-FAMILY RESIDENTIAL BUILDINGS—ADDITIONS AND …
  10. Chapter 10 — MULTIFAMILY BUILDINGS—MANDATORY REQUIREMENTS
  11. Chapter 11 — MULTIFAMILY BUILDINGS—PERFORMANCE AND PRESCRIPTIV…
  12. Chapter 12 — MULTIFAMILY BUILDINGS—ADDITIONS, ALTERATIONS AND …

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