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

Section 120.10 — MANDATORY REQUIREMENTS FOR FANS

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

(a) Each fan or fan array with a combined motor nameplate horsepower greater than 1.00 hp or with a combined fan nameplate electrical input power greater than 0.89 kW shall have a fan energy index (FEI) of 1.00 or higher at fan system design conditions. Each fan and fan array used for a variable-air-volume system that meets the requirements of Section 140.4(c)2 shall have an FEI of 0.95 or higher at fan system design conditions.

  1. The FEI for fan arrays shall be calculated in accordance with ANSI/AMCA 208-18 Annex C.
  2. All FEI values shall be provided by a manufacturer, where fan selection software and/or fan catalogs display third-partyverified FEI values in accordance with Appendix A to Subpart J of Part 10 CFR 431. Exception to Section 120.10(a)2: FEI values for embedded fans do not need to be third-party verified.

Exception 1 to Section 120.10(a): Embedded fans that are part of the equipment listed under Section 110.1 or Section 110.2, computer room air conditioners (CRACs) as defined in 10 CFR 431, and DX-DOAS units.

Exception 2 to Section 120.10(a): Embedded fans and embedded fan arrays with a combined motor nameplate horsepower of 5 hp or less or with a fan system electrical input power of 4.1 kW or less.

Exception 3 to Section 120.10(a): Circulation fans, ceiling fans and air curtains.

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

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

Exception 4 to Section 120.10(a): Fans that are intended to operate only during emergency conditions.

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, 25402.8 and 25943, Public Resources Code .

94 2025 CALIFORNIA ENERGY CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

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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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