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Chapter 2 — DEFINITIONS

202.1 General.

California Mechanical Code (Title 24, Part 4) · 2022 edition · updated 2026-09-10 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

The definitions of terms are arranged alphabetically according to the first word of the term.

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▸Contents — California Mechanical Code (Title 24, Part 4)
California Mechanical Code (Title 24, Part 4)
  1. Chapter 1 — GENERAL CODE PROVISIONS
  2. ▸Chapter 2 — DEFINITIONS
    Overview
    1. 201.1 Applicability. For the purpose of this code, the followi…
    2. 202.1 General. The definitions of terms are arranged alphabeti…
    3. 203.0 – A –
    4. 204.0 – B –
    5. 205.0 – C –
    6. 206.0 – D –
    7. 207.0 – E –
    8. 208.0 – F –
    9. 209.0 – G –
    10. 210.0 – H –
    11. 211.0 – I –
    12. 212.0 – J –
    13. 214.0 – L –
    14. 215.0 – M –
    15. 216.0 – N –
    16. 217.0 – O –
    17. 218.0 – P –
    18. 220.0 – R –
    19. 221.0 – S –
    20. 222.0 – T –
    21. 223.0 – U –
    22. 224.0 – V –
    23. 228.0 – Z –
  3. Chapter 3 — GENERAL REGULATIONS
  4. Chapter 4 — VENTILATION AIR
  5. Chapter 5 — EXHAUST SYSTEMS
  6. Chapter 6 — DUCT SYSTEMS
  7. Chapter 7 — COMBUSTION AIR
  8. Chapter 8 — CHIMNEYS AND VENTS
  9. Chapter 9 — INSTALLATION OF SPECIFIC APPLIANCES
  10. Chapter 10 — BOILERS AND PRESSURE VESSELS
  11. Chapter 11 — REFRIGERATION
  12. Chapter 12 — HYDRONICS
  13. Chapter 13 — FUEL GAS PIPING
  14. Chapter 14 — PROCESS PIPING
  15. Chapter 15 — SOLAR ENERGY SYSTEMS
  16. Chapter 16 — STATIONARY POWER PLANTS
  17. Chapter 17 — REFERENCED STANDARDS
  18. Appendix A — RESIDENTIAL PLAN EXAMINER REVIEW FORM FOR HVAC SY…
  19. Appendix B — PROCEDURES TO BE FOLLOWED TO PLACE GAS EQUIPMENT …
  20. Appendix C — INSTALLATION AND TESTING OF OIL (LIQUID) FUEL-FIR…
  21. Appendix D — FUEL SUPPLY: MANUFACTURED/MOBILE HOME PARKS AND R…
  22. Appendix E — SUSTAINABLE PRACTICES
  23. Appendix F — GEOTHERMAL ENERGY SYSTEMS
  24. Appendix G — SIZING OF VENTING SYSTEMS AND OUTDOOR COMBUSTION …
  25. Appendix H — EXAMPLE CALCULATION OF OUTDOOR AIR RATE

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