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International Mechanical Code, 2024
- 2024 INTERNATIONAL MECHANICAL CODE®
- 2024 INTERNATIONAL MECHANICAL CODE®
- COPYRIGHT
- PREFACE
- FORMATTING CHANGES TO THE 2024 INTERNATIONAL CODES
- CONTENTS
- CHAPTER 1: SCOPE AND ADMINSITRATION [Go to Page]
- PART 1—SCOPE AND APPLICATION [Go to Page]
- SECTION 101—SCOPE AND GENERAL REQUIREMENTS
- SECTION 102—APPLICABILITY
- PART 2—ADMINISTRATION AND ENFORCEMENT [Go to Page]
- SECTION 103—CODE COMPLIANCE AGENCY
- SECTION 104—DUTIES AND POWERS OF THE CODE OFFICIAL
- SECTION 105—PERMITS
- SECTION 106—CONSTRUCTION DOCUMENTS
- SECTION 107—NOTICE OF APPROVAL
- SECTION 108—FEES
- SECTION 109—SERVICE UTILITIES
- SECTION 110—TEMPORARY USES, EQUIPMENT AND SYSTEMS
- SECTION 111—INSPECTIONS AND TESTING
- SECTION 112—MEANS OF APPEALS
- SECTION 113—BOARD OF APPEALS
- SECTION 114—VIOLATIONS
- SECTION 115—STOP WORK ORDER
- CHAPTER 2: DEFINITIONS [Go to Page]
- SECTION 201—GENERAL
- SECTION 202—GENERAL DEFINITIONS
- CHAPTER 3: GENERAL REGULATIONS [Go to Page]
- SECTION 301—GENERAL
- SECTION 302—PROTECTION OF STRUCTURE
- SECTION 303—EQUIPMENT AND APPLIANCE LOCATION
- SECTION 304—INSTALLATION
- SECTION 305—PIPING SUPPORT [Go to Page]
- TABLE 305.4—PIPING SUPPORT SPACINGa
- SECTION 306—ACCESS AND SERVICE SPACE
- SECTION 307—CONDENSATE DISPOSAL [Go to Page]
- TABLE 307.2.2—CONDENSATE DRAIN SIZING
- SECTION 308—CLEARANCE REDUCTION [Go to Page]
- TABLE 308.4.2—CLEARANCE REDUCTION METHODSb
- SECTION 309—TEMPERATURE CONTROL
- SECTION 310—EXPLOSION CONTROL
- SECTION 311—SMOKE AND HEAT VENTS
- SECTION 312—HEATING AND COOLING LOAD CALCULATIONS
- CHAPTER 4: VENTILATION [Go to Page]
- SECTION 401—GENERAL [Go to Page]
- TABLE 401.5—OPENING SIZES IN LOUVERS, GRILLES AND SCREENS PROTECTING AIR INTAKE OPENINGS
- SECTION 402—NATURAL VENTILATION
- SECTION 403—MECHANICAL VENTILATION [Go to Page]
- TABLE 403.3.1.1—MINIMUM VENTILATION RATES [Go to Page]
- TABLE 403.3.1.1—MINIMUM VENTILATION RATES—continued
- TABLE 403.3.1.1—MINIMUM VENTILATION RATES—continued
- TABLE 403.3.1.1—MINIMUM VENTILATION RATES—continued
- TABLE 403.3.1.1—MINIMUM VENTILATION RATES—continued
- TABLE 403.3.1.1.1.2—ZONE AIR DISTRIBUTION EFFECTIVENESSa, b, c, d [Go to Page]
- TABLE 403.3.1.1.1.2—ZONE AIR DISTRIBUTION EFFECTIVENESSa, b, c, d—continued
- EQUATION 4-1
- EQUATION 4-2
- EQUATION 4-3
- EQUATION 4-4
- EQUATION 4-5
- TABLE 403.3.1.1.2.3.2—SYSTEM VENTILATION EFFICIENCYa, b [Go to Page]
- TABLE 403.3.1.1.2.3.2—SYSTEM VENTILATION EFFICIENCYa, b—continued
- EQUATION 4-6
- EQUATION 4-7
- EQUATION 4-8
- EQUATION 4-9
- TABLE 403.3.2.3—MINIMUM REQUIRED LOCAL EXHAUST RATES FOR GROUP R-2, R-3 AND R-4 OCCUPANCIES
- SECTION 404—ENCLOSED PARKING GARAGES
- SECTION 405—SYSTEMS CONTROL
- SECTION 406—VENTILATION OF UNINHABITED SPACES
- SECTION 407—AMBULATORY CARE FACILITIES AND GROUP I-2 OCCUPANCIES
- CHAPTER 5: EXHAUST SYSTEMS [Go to Page]
- SECTION 501—GENERAL
- SECTION 502—REQUIRED SYSTEMS
- SECTION 503—MOTORS AND FANS
- SECTION 504—CLOTHES DRYER EXHAUST [Go to Page]
- TABLE 504.9.4.1—DRYER EXHAUST DUCT FITTING EQUIVALENT LENGTH
- SECTION 505—DOMESTIC COOKING EXHAUST EQUIPMENT
- SECTION 506—COMMERCIAL KITCHEN HOOD VENTILATION SYSTEM DUCTS AND EXHAUST EQUIPMENT
- SECTION 507—COMMERCIAL KITCHEN HOODS [Go to Page]
- TABLE 507.2.8—MINIMUM DISTANCE BETWEEN THE LOWEST EDGE OF A GREASE FILTER AND THE COOKING SURFACE OR THE HEATING SURFACE
- SECTION 508—COMMERCIAL KITCHEN MAKEUP AIR
- SECTION 509—HAZARDOUS EXHAUST SYSTEMS [Go to Page]
- TABLE 509.8—MINIMUM DUCT THICKNESS
- TABLE 509.8.2—CLEARANCE TO COMBUSTIBLES [Go to Page]
- TABLE 509.8.2—CLEARANCE TO COMBUSTIBLES—continued
- SECTION 510—DUST, STOCK AND REFUSE CONVEYING SYSTEMS [Go to Page]
- TABLE 510.2—CONSTRUCTION, CLEARANCE AND TERMINATION REQUIREMENTS FOR SINGLE-WALL METAL CHIMNEYS
- SECTION 511—SUBSLAB SOIL EXHAUST SYSTEMS
- SECTION 512—SMOKE CONTROL SYSTEMS
- SECTION 513—ENERGY RECOVERY VENTILATION SYSTEMS
- CHAPTER 6: DUCT SYSTEMS [Go to Page]
- SECTION 601—GENERAL
- SECTION 602—PLENUMS
- SECTION 603—DUCT CONSTRUCTION AND INSTALLATION [Go to Page]
- TABLE 603.4—DUCT CONSTRUCTION MINIMUM SHEET METAL THICKNESS FOR SINGLE DWELLING UNITSa [Go to Page]
- TABLE 603.4—DUCT CONSTRUCTION MINIMUM SHEET METAL THICKNESS FOR SINGLE DWELLING UNITSa—continued
- SECTION 604—INSULATION
- SECTION 605—AIR FILTERS
- SECTION 606—SMOKE DETECTION SYSTEMS CONTROL
- SECTION 607—DUCT AND TRANSFER OPENINGS [Go to Page]
- [BF] TABLE 607.3.2.1—FIRE DAMPER RATING
- SECTION 608—BALANCING
- CHAPTER 7: COMBUSTION AIR [Go to Page]
- SECTION 701—GENERAL
- CHAPTER 8: CHIMNEYS AND VENTS [Go to Page]
- SECTION 801—GENERAL
- SECTION 802—VENTS [Go to Page]
- TABLE 802.2—VENT APPLICATION
- SECTION 803—CONNECTORS [Go to Page]
- TABLE 803.9(1)—MINIMUM CHIMNEY CONNECTOR THICKNESS FOR LOW-HEAT APPLIANCES
- TABLE 803.9(2)—MINIMUM CHIMNEY CONNECTOR THICKNESS FOR MEDIUM- AND HIGH-HEAT APPLIANCES
- TABLE 803.10.4—CHIMNEY CONNECTOR SYSTEMS AND CLEARANCES TO COMBUSTIBLE WALL MATERIALS FOR DOMESTIC HEATING APPLIANCESa, b, c, d
- TABLE 803.10.6—CONNECTOR CLEARANCES TO COMBUSTIBLES
- SECTION 804—DIRECT-VENT, INTEGRAL VENT AND MECHANICAL DRAFT SYSTEMS
- SECTION 805—FACTORY-BUILT CHIMNEYS
- SECTION 806—METAL CHIMNEYS
- CHAPTER 9: SPECIFIC APPLIANCES, FIREPLACES AND SOLID FUEL-BURNING EQUIPMENT [Go to Page]
- SECTION 901—GENERAL
- SECTION 902—MASONRY FIREPLACES
- SECTION 903—FACTORY-BUILT FIREPLACES
- SECTION 904—PELLET FUEL-BURNING APPLIANCES
- SECTION 905—FIREPLACE STOVES AND ROOM HEATERS
- SECTION 906—FACTORY-BUILT BARBECUE APPLIANCES
- SECTION 907—INCINERATORS AND CREMATORIES
- SECTION 908—COOLING TOWERS, EVAPORATIVE CONDENSERS AND FLUID COOLERS
- SECTION 909—VENTED WALL FURNACES
- SECTION 910—FLOOR FURNACES
- SECTION 911—DUCT FURNACES
- SECTION 912—INFRARED RADIANT HEATERS
- SECTION 913—CLOTHES DRYERS
- SECTION 914—SAUNA HEATERS
- SECTION 915—ENGINE AND GAS TURBINE-POWERED EQUIPMENT AND APPLIANCES
- SECTION 916—POOL AND SPA HEATERS
- SECTION 917—COOKING APPLIANCES
- SECTION 918—FORCED-AIR WARM-AIR FURNACES
- SECTION 919—CONVERSION BURNERS
- SECTION 920—UNIT HEATERS
- SECTION 921—VENTED ROOM HEATERS
- SECTION 922—KEROSENE AND OIL-FIRED STOVES
- SECTION 923—SMALL CERAMIC KILNS
- SECTION 924—STATIONARY FUEL CELL POWER SYSTEMS
- SECTION 925—MASONRY HEATERS
- SECTION 926—GASEOUS HYDROGEN SYSTEMS
- SECTION 927—RADIANT HEATING SYSTEMS
- SECTION 928—EVAPORATIVE COOLING EQUIPMENT
- SECTION 929—UNVENTED ALCOHOL FUEL-BURNING DECORATIVE APPLIANCES
- SECTION 930—LARGE-DIAMETER CEILING FANS
- SECTION 931—STEAM BATH EQUIPMENT
- CHAPTER 10: BOILERS, WATER HEATERS AND PRESSURE VESSELS [Go to Page]
- SECTION 1001—GENERAL
- SECTION 1002—WATER HEATERS
- SECTION 1003—PRESSURE VESSELS
- SECTION 1004—BOILERS [Go to Page]
- TABLE 1004.3.1—BOILER TOP CLEARANCES
- SECTION 1005—BOILER CONNECTIONS
- SECTION 1006—SAFETY AND PRESSURE RELIEF VALVES AND CONTROLS
- SECTION 1007—BOILER LOW-WATER CUTOFF
- SECTION 1008—BOTTOM BLOWOFF VALVE
- SECTION 1009—HOT WATER BOILER EXPANSION TANK [Go to Page]
- EQUATION 10-1
- TABLE 1009.2—CLOSED-TYPE EXPANSION TANK SIZING
- SECTION 1010—GAUGES
- SECTION 1011—TESTS
- CHAPTER 11: REFRIGERATION [Go to Page]
- SECTION 1101—GENERAL [Go to Page]
- TABLE 1101.2—FACTORY-BUILT EQUIPMENT AND APPLIANCES
- SECTION 1102—SYSTEM REQUIREMENTS
- SECTION 1103—REFRIGERATION SYSTEM CLASSIFICATION [Go to Page]
- TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL [Go to Page]
- TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL—continued
- TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL—continued
- TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL—continued
- TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL—continued
- TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL—continued
- TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL—continued
- SECTION 1104—REFRIGERATION SYSTEM APPLICATION REQUIREMENTS
- SECTION 1105—MACHINERY ROOM, GENERAL REQUIREMENTS
- SECTION 1106—MACHINERY ROOM, SPECIAL REQUIREMENTS [Go to Page]
- TABLE 1106.4.2—GROUP A2L and B2L DETECTOR ACTIVATION
- SECTION 1107—PIPING MATERIAL [Go to Page]
- TABLE 1107.4—REFRIGERANT PIPE
- TABLE 1107.5—REFRIGERANT PIPE FITTINGS
- TABLE 1107.5.1—COPPER BRAZED SWAGED CUP DEPTHS
- SECTION 1108—JOINTS AND CONNECTIONS
- SECTION 1109—REFRIGERANT PIPE INSTALLATION [Go to Page]
- TABLE 1109.3.2—SHAFT VENTILATION VELOCITY
- SECTION 1110—REFRIGERATION PIPING SYSTEM TEST
- [F] SECTION 1111 —PERIODIC TESTING
- CHAPTER 12: HYDRONIC PIPING [Go to Page]
- SECTION 1201—GENERAL
- SECTION 1202—MATERIAL [Go to Page]
- TABLE 1202.4—HYDRONIC PIPE
- TABLE 1202.5—HYDRONIC PIPE FITTINGS
- SECTION 1203—JOINTS AND CONNECTIONS
- SECTION 1204—PIPE INSULATION
- SECTION 1205—VALVES
- SECTION 1206—PIPING INSTALLATION
- SECTION 1207—TRANSFER FLUID
- SECTION 1208—TESTS
- SECTION 1209—EMBEDDED PIPING [Go to Page]
- TABLE 1209.6.1—MAXIMUM CIRCUIT LENGTH OF RADIANT TUBING FROM A SUPPLY-AND-RETURN MANIFOLD ARRANGEMENT
- TABLE 1209.7.1—MAXIMUM CIRCUIT LENGTH OF SNOW- ANDICE-MELT TUBING FROM A SUPPLY-AND-RETURN MANIFOLD ARRANGEMENT
- SECTION 1210—PLASTIC PIPE GROUND-SOURCE HEAT PUMP LOOP SYSTEMS [Go to Page]
- TABLE 1210.4—GROUND-SOURCE LOOP PIPE
- TABLE 1210.5—GROUND-SOURCE LOOP PIPE FITTINGS
- CHAPTER 13: FUEL OIL PIPING AND STORAGE [Go to Page]
- SECTION 1301—GENERAL
- SECTION 1302—MATERIAL [Go to Page]
- TABLE 1302.3—FUEL OIL PIPING AND FITTINGS
- SECTION 1303—JOINTS AND CONNECTIONS
- SECTION 1304—PIPING SUPPORT
- SECTION 1305—FUEL OIL SYSTEM INSTALLATION
- SECTION 1306—OIL GAUGING
- SECTION 1307—FUEL OIL VALVES
- SECTION 1308—TESTING
- CHAPTER 14: SOLAR THERMAL SYSTEMS [Go to Page]
- SECTION 1401—GENERAL
- SECTION 1402—DESIGN AND INSTALLATION
- SECTION 1403—HEAT TRANSFER FLUIDS
- SECTION 1404—LABELING
- CHAPTER 15: REFERENCED STANDARDS [Go to Page]
- ACCA
- AHRI
- AISI
- AMCA
- ANSI
- ASHRAE
- ASME
- ASSE
- ASSP
- ASTM
- AWS
- AWWA
- CPSC
- CSA
- DOL
- FDA
- FS
- ICC
- IIAR
- MSS
- NAIMA
- NBBI
- NFPA
- NSF
- SMACNA
- UL
- APPENDIX A: CHIMNEY CONNECTOR PASS-THROUGHS [Go to Page]
- SECTION A101—CHIMNEY CONNECTOR SYSTEMS [Go to Page]
- FIGURE A101.1(1)—CHIMNEY CONNECTOR SYSTEMS
- FIGURE A101.1(2)—CHIMNEY CONNECTOR SYSTEMS
- APPENDIX B: RECOMMENDED PERMIT FEE SCHEDULE [Go to Page]
- SECTION B101—MECHANICAL WORK, OTHER THAN GAS PIPING SYSTEMS
- SECTION B102—FEE FOR REINSPECTION
- SECTION B103—TEMPORARY OPERATION INSPECTION FEE
- SECTION B104—SELF-CONTAINED UNITS LESS THAN 2 TONS
- APPENDIX C: BOARD OF APPEALS [Go to Page]
- [A] SECTION C101—GENERAL
- APPENDIX D: CLEAN AIR DELIVERY [Go to Page]
- SECTION D101—GENERAL
- APPENDIX E: CLEAN AIR DELIVERY AND MONITORING [Go to Page]
- SECTION E101—GENERAL
- INDEX
- ICC EVALUATION SERVICE®
- ICC CREDENTIALING
- ICC CHANGES TO THE CODE DEVELOPMENT PROCESS
- ICC DIGITAL CODES PREMIUM® [Go to Page]