ICC IMC 2024 1stptg

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International Mechanical Code

Published By	Publication Date	Number of Pages
ICC	2024

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Description

The 2024 International Codes (I-Codes ) have undergone substantial formatting changes as part of the digital transformation strategy of the International Code Council (ICC ) to improve the user experience. The changes, promoting a cleaner, more modern look and enhancing readability and sustainability, include: Single column text format and modernized font styles improves readability QR Codes replace vertical margin sidebars and arrows to identify code changes more accurately Shading for table headers and notes improves locating tables and applicable notes Grouping of associated content brings tables and figures immediately after the parent section Users have capability to validate authenticity of their book and register it with the ICC to receive incentives. The International Mechanical Code (IMC ) establishes minimum regulations for mechanical systems using prescriptive and performance-related provisions. The IMC was developed with broad-based principles that make possible the use of new and innovative materials, methods and design. For the most current adoptions details go to International Code Adoptions. Important changes in the 2024 IMC include: Provisions prohibiting the use of domestic ductless range hoods in Groups I-1 and I-2 were removed. An identification requirement was added for Group A2L and B2L refrigerants. The requirements for machinery rooms containing Group A2L refrigerants were changed and Group B2L refrigerants were added to the provisions. Limits for the use of Group A1 and A2L refrigerants changed in high probability systems used for human comfort, unless permitted as excepted. UL 2158A Standard was added to the requirements for commercial dryer exhaust. Ventilation requirements for outpatient healthcare facilities to match the requirements in ASHRAE 62.1-2019. Addition of a new minimum landing at the roof hatch for personnel to safely use the hatch when accessing the roof for repair and maintenance. Addition of a new testing option for grease ductwork. Requirements for steam baths were added. A new standard requirement for refrigeration systems containing carbon dioxide was added.

PDF Catalog

PDF Pages	PDF Title
1	2024 INTERNATIONAL MECHANICAL CODE®
2	2024 INTERNATIONAL MECHANICAL CODE®
3	COPYRIGHT
5	PREFACE FORMATTING CHANGES TO THE 2024 INTERNATIONAL CODES
12	CONTENTS
14	CHAPTER 1: SCOPE AND ADMINSITRATION PART 1—SCOPE AND APPLICATION SECTION 101—SCOPE AND GENERAL REQUIREMENTS SECTION 102—APPLICABILITY
15	PART 2—ADMINISTRATION AND ENFORCEMENT SECTION 103—CODE COMPLIANCE AGENCY SECTION 104—DUTIES AND POWERS OF THE CODE OFFICIAL
18	SECTION 105—PERMITS
19	SECTION 106—CONSTRUCTION DOCUMENTS SECTION 107—NOTICE OF APPROVAL
20	SECTION 108—FEES SECTION 109—SERVICE UTILITIES SECTION 110—TEMPORARY USES, EQUIPMENT AND SYSTEMS SECTION 111—INSPECTIONS AND TESTING
22	SECTION 112—MEANS OF APPEALS SECTION 113—BOARD OF APPEALS SECTION 114—VIOLATIONS
23	SECTION 115—STOP WORK ORDER
24	CHAPTER 2: DEFINITIONS SECTION 201—GENERAL SECTION 202—GENERAL DEFINITIONS
36	CHAPTER 3: GENERAL REGULATIONS SECTION 301—GENERAL
37	SECTION 302—PROTECTION OF STRUCTURE SECTION 303—EQUIPMENT AND APPLIANCE LOCATION
38	SECTION 304—INSTALLATION
39	SECTION 305—PIPING SUPPORT
40	TABLE 305.4—PIPING SUPPORT SPACINGa SECTION 306—ACCESS AND SERVICE SPACE
42	SECTION 307—CONDENSATE DISPOSAL TABLE 307.2.2—CONDENSATE DRAIN SIZING
43	SECTION 308—CLEARANCE REDUCTION
44	TABLE 308.4.2—CLEARANCE REDUCTION METHODSb SECTION 309—TEMPERATURE CONTROL SECTION 310—EXPLOSION CONTROL
45	SECTION 311—SMOKE AND HEAT VENTS SECTION 312—HEATING AND COOLING LOAD CALCULATIONS
46	CHAPTER 4: VENTILATION SECTION 401—GENERAL TABLE 401.5—OPENING SIZES IN LOUVERS, GRILLES AND SCREENS PROTECTING AIR INTAKE OPENINGS
47	SECTION 402—NATURAL VENTILATION SECTION 403—MECHANICAL VENTILATION
48	TABLE 403.3.1.1—MINIMUM VENTILATION RATES
49	TABLE 403.3.1.1—MINIMUM VENTILATION RATES—continued
50	TABLE 403.3.1.1—MINIMUM VENTILATION RATES—continued
51	TABLE 403.3.1.1—MINIMUM VENTILATION RATES—continued
52	TABLE 403.3.1.1—MINIMUM VENTILATION RATES—continued TABLE 403.3.1.1.1.2—ZONE AIR DISTRIBUTION EFFECTIVENESSa, b, c, d EQUATION 4-1
53	TABLE 403.3.1.1.1.2—ZONE AIR DISTRIBUTION EFFECTIVENESSa, b, c, d—continued EQUATION 4-2 EQUATION 4-3 EQUATION 4-4 EQUATION 4-5 TABLE 403.3.1.1.2.3.2—SYSTEM VENTILATION EFFICIENCYa, b
54	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
55	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
56	CHAPTER 5: EXHAUST SYSTEMS SECTION 501—GENERAL
57	SECTION 502—REQUIRED SYSTEMS
63	SECTION 503—MOTORS AND FANS
64	SECTION 504—CLOTHES DRYER EXHAUST
65	TABLE 504.9.4.1—DRYER EXHAUST DUCT FITTING EQUIVALENT LENGTH
66	SECTION 505—DOMESTIC COOKING EXHAUST EQUIPMENT
67	SECTION 506—COMMERCIAL KITCHEN HOOD VENTILATION SYSTEM DUCTS AND EXHAUST EQUIPMENT
72	SECTION 507—COMMERCIAL KITCHEN HOODS
74	TABLE 507.2.8—MINIMUM DISTANCE BETWEEN THE LOWEST EDGE OF A GREASE FILTER AND THE COOKING SURFACE OR THE HEATING SURFACE
76	SECTION 508—COMMERCIAL KITCHEN MAKEUP AIR SECTION 509—HAZARDOUS EXHAUST SYSTEMS
78	TABLE 509.8—MINIMUM DUCT THICKNESS TABLE 509.8.2—CLEARANCE TO COMBUSTIBLES
79	TABLE 509.8.2—CLEARANCE TO COMBUSTIBLES—continued SECTION 510—DUST, STOCK AND REFUSE CONVEYING SYSTEMS
80	TABLE 510.2—CONSTRUCTION, CLEARANCE AND TERMINATION REQUIREMENTS FOR SINGLE-WALL METAL CHIMNEYS SECTION 511—SUBSLAB SOIL EXHAUST SYSTEMS SECTION 512—SMOKE CONTROL SYSTEMS
84	SECTION 513—ENERGY RECOVERY VENTILATION SYSTEMS
86	CHAPTER 6: DUCT SYSTEMS SECTION 601—GENERAL
87	SECTION 602—PLENUMS
89	SECTION 603—DUCT CONSTRUCTION AND INSTALLATION TABLE 603.4—DUCT CONSTRUCTION MINIMUM SHEET METAL THICKNESS FOR SINGLE DWELLING UNITSa
90	TABLE 603.4—DUCT CONSTRUCTION MINIMUM SHEET METAL THICKNESS FOR SINGLE DWELLING UNITSa—continued
92	SECTION 604—INSULATION
93	SECTION 605—AIR FILTERS SECTION 606—SMOKE DETECTION SYSTEMS CONTROL
94	SECTION 607—DUCT AND TRANSFER OPENINGS [BF] TABLE 607.3.2.1—FIRE DAMPER RATING
99	SECTION 608—BALANCING
100	CHAPTER 7: COMBUSTION AIR SECTION 701—GENERAL
101	CHAPTER 8: CHIMNEYS AND VENTS SECTION 801—GENERAL
102	SECTION 802—VENTS TABLE 802.2—VENT APPLICATION
103	SECTION 803—CONNECTORS TABLE 803.9(1)—MINIMUM CHIMNEY CONNECTOR THICKNESS FOR LOW-HEAT APPLIANCES
104	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
105	TABLE 803.10.6—CONNECTOR CLEARANCES TO COMBUSTIBLES SECTION 804—DIRECT-VENT, INTEGRAL VENT AND MECHANICAL DRAFT SYSTEMS
106	SECTION 805—FACTORY-BUILT CHIMNEYS
107	SECTION 806—METAL CHIMNEYS
108	CHAPTER 9: SPECIFIC APPLIANCES, FIREPLACES AND SOLID FUEL-BURNING EQUIPMENT 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
109	SECTION 907—INCINERATORS AND CREMATORIES SECTION 908—COOLING TOWERS, EVAPORATIVE CONDENSERS AND FLUID COOLERS SECTION 909—VENTED WALL FURNACES SECTION 910—FLOOR FURNACES
110	SECTION 911—DUCT FURNACES SECTION 912—INFRARED RADIANT HEATERS SECTION 913—CLOTHES DRYERS SECTION 914—SAUNA HEATERS
111	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
112	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
113	SECTION 931—STEAM BATH EQUIPMENT
114	CHAPTER 10: BOILERS, WATER HEATERS AND PRESSURE VESSELS SECTION 1001—GENERAL SECTION 1002—WATER HEATERS SECTION 1003—PRESSURE VESSELS
115	SECTION 1004—BOILERS TABLE 1004.3.1—BOILER TOP CLEARANCES SECTION 1005—BOILER CONNECTIONS
116	SECTION 1006—SAFETY AND PRESSURE RELIEF VALVES AND CONTROLS SECTION 1007—BOILER LOW-WATER CUTOFF SECTION 1008—BOTTOM BLOWOFF VALVE
117	SECTION 1009—HOT WATER BOILER EXPANSION TANK EQUATION 10-1 TABLE 1009.2—CLOSED-TYPE EXPANSION TANK SIZING SECTION 1010—GAUGES
118	SECTION 1011—TESTS
119	CHAPTER 11: REFRIGERATION SECTION 1101—GENERAL TABLE 1101.2—FACTORY-BUILT EQUIPMENT AND APPLIANCES
120	SECTION 1102—SYSTEM REQUIREMENTS SECTION 1103—REFRIGERATION SYSTEM CLASSIFICATION
121	TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL
122	TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL—continued
123	TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL—continued
124	TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL—continued
125	TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL—continued
126	TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL—continued
127	TABLE 1103.1—REFRIGERANT CLASSIFICATION, AMOUNT AND OEL—continued
128	SECTION 1104—REFRIGERATION SYSTEM APPLICATION REQUIREMENTS
130	SECTION 1105—MACHINERY ROOM, GENERAL REQUIREMENTS
131	SECTION 1106—MACHINERY ROOM, SPECIAL REQUIREMENTS TABLE 1106.4.2—GROUP A2L and B2L DETECTOR ACTIVATION SECTION 1107—PIPING MATERIAL
132	TABLE 1107.4—REFRIGERANT PIPE TABLE 1107.5—REFRIGERANT PIPE FITTINGS TABLE 1107.5.1—COPPER BRAZED SWAGED CUP DEPTHS
133	SECTION 1108—JOINTS AND CONNECTIONS
134	SECTION 1109—REFRIGERANT PIPE INSTALLATION
135	TABLE 1109.3.2—SHAFT VENTILATION VELOCITY
136	SECTION 1110—REFRIGERATION PIPING SYSTEM TEST [F] SECTION 1111 —PERIODIC TESTING
137	CHAPTER 12: HYDRONIC PIPING SECTION 1201—GENERAL SECTION 1202—MATERIAL TABLE 1202.4—HYDRONIC PIPE
138	TABLE 1202.5—HYDRONIC PIPE FITTINGS SECTION 1203—JOINTS AND CONNECTIONS
140	SECTION 1204—PIPE INSULATION SECTION 1205—VALVES SECTION 1206—PIPING INSTALLATION
141	SECTION 1207—TRANSFER FLUID SECTION 1208—TESTS SECTION 1209—EMBEDDED PIPING
142	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
143	SECTION 1210—PLASTIC PIPE GROUND-SOURCE HEAT PUMP LOOP SYSTEMS TABLE 1210.4—GROUND-SOURCE LOOP PIPE TABLE 1210.5—GROUND-SOURCE LOOP PIPE FITTINGS
146	CHAPTER 13: FUEL OIL PIPING AND STORAGE SECTION 1301—GENERAL SECTION 1302—MATERIAL TABLE 1302.3—FUEL OIL PIPING AND FITTINGS
147	SECTION 1303—JOINTS AND CONNECTIONS SECTION 1304—PIPING SUPPORT SECTION 1305—FUEL OIL SYSTEM INSTALLATION
148	SECTION 1306—OIL GAUGING SECTION 1307—FUEL OIL VALVES SECTION 1308—TESTING
149	CHAPTER 14: SOLAR THERMAL SYSTEMS SECTION 1401—GENERAL SECTION 1402—DESIGN AND INSTALLATION
151	SECTION 1403—HEAT TRANSFER FLUIDS SECTION 1404—LABELING
152	CHAPTER 15: REFERENCED STANDARDS ACCA AHRI AISI AMCA ANSI ASHRAE
153	ASME
154	ASSE ASSP ASTM
158	AWS AWWA CPSC CSA
159	DOL FDA FS ICC
160	IIAR MSS NAIMA NBBI NFPA
161	NSF SMACNA
162	UL
166	APPENDIX A: CHIMNEY CONNECTOR PASS-THROUGHS SECTION A101—CHIMNEY CONNECTOR SYSTEMS FIGURE A101.1(1)—CHIMNEY CONNECTOR SYSTEMS
167	FIGURE A101.1(2)—CHIMNEY CONNECTOR SYSTEMS
168	APPENDIX B: RECOMMENDED PERMIT FEE SCHEDULE 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
169	APPENDIX C: BOARD OF APPEALS [A] SECTION C101—GENERAL
171	APPENDIX D: CLEAN AIR DELIVERY SECTION D101—GENERAL
172	APPENDIX E: CLEAN AIR DELIVERY AND MONITORING SECTION E101—GENERAL
173	INDEX
176	ICC EVALUATION SERVICE®
177	ICC CREDENTIALING
178	ICC CHANGES TO THE CODE DEVELOPMENT PROCESS
179	ICC DIGITAL CODES PREMIUM®