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Chapter 4 — RESIDENTIAL MANDATORY MEASURES

Section 4.507 — ENVIRONMENTAL COMFORT

2025 California Green Building Standards Code (Title 24, Part 11) · 2025 edition · updated 2026-07-25 · California

4.507.1 Reserved.

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

RESIDENTIAL MANDATORY MEASURES

4.507.2 Heating and air-conditioning system design. Heating and air-conditioning systems shall be sized, designed and have their equipment selected using the following methods:

  1. The heat loss and heat gain is established according to ANSI/ACCA 2 Manual J—2016 ( Residential Load Calculation ), ASHRAE handbooks or other equivalent design software or methods.
  2. Duct systems are sized according to ANSI/ACCA 1 Manual D—2016 ( Residential Duct Systems ), ASHRAE handbooks or other equivalent design software or methods.
  3. Select heating and cooling equipment according to ANSI/ACCA 3 Manual S—2014 ( Residential Equipment Selection ) or other equivalent design software or methods.

Exception: Use of alternate design temperatures necessary to ensure the systems function are acceptable.

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▸ Contents — 2025 California Green Building Standards Code (Title 24, Part 11)
2025 California Green Building Standards Code (Title 24, Part 11)
  1. Chapter 1 — ADMINISTRATION
  2. Chapter 2 — DEFINITIONS
  3. Chapter 3 — GREEN BUILDING
  4. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  5. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  6. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  7. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  8. ▸ Chapter 4 — RESIDENTIAL MANDATORY MEASURES
    Overview
    1. Section 4.501 — GENERAL
    2. Section 4.502 — DEFINITIONS
    3. Section 4.503 — FIREPLACES
    4. Section 4.504 — POLLUTANT CONTROL
    5. Section 4.505 — INTERIOR MOISTURE CONTROL
    6. Section 4.506 — INDOOR AIR QUALITY AND EXHAUST
    7. Section 4.507 — ENVIRONMENTAL COMFORT
    8. Section 4.508 — OUTDOOR AIR QUALITY
  9. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  10. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  11. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  12. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  13. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  14. Chapter 6 — REFERENCED ORGANIZATIONS AND STANDARDS
  15. Chapter 7 — INSTALLER AND SPECIAL INSPECTOR QUALIFICATIONS
  16. Chapter 8 — COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL

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