2018 International Mechanical Code®

2018 IMC® INTERNATIONAL MECHANICAL CODE®
2018 IMC® TITLE PAGE
COPYRIGHT
PREFACE
EFFECTIVE USE OF THE INTERNATIONAL MECHANICAL CODE
TABLE OF CONTENTS
CHAPTER 1 SCOPE AND ADMINISTRATION
	PART 1–SCOPE AND APPLICATION
		SECTION 101 GENERAL
		SECTION 102 APPLICABILITY
	PART 2–ADMINISTRATION AND ENFORCEMENT
		SECTION 103 DEPARTMENT OF MECHANICAL INSPECTION
		SECTION 104 DUTIES AND POWERS OF THE CODE OFFICIAL
		SECTION 105 APPROVAL
		SECTION 106 PERMITS
		SECTION 107 INSPECTIONS AND TESTING
		SECTION 108 VIOLATIONS
		SECTION 109 MEANS OF APPEAL
		SECTION 110 TEMPORARY EQUIPMENT, SYSTEMS AND USES
CHAPTER 2 DEFINITIONS
	SECTION 201 GENERAL
	SECTION 202 GENERAL DEFINITIONS
CHAPTER 3 GENERAL REGULATIONS
	SECTION 301 GENERAL
	SECTION 302 PROTECTION OF STRUCTURE
	SECTION 303 EQUIPMENT AND APPLIANCE LOCATION
	SECTION 304 INSTALLATION
	SECTION 305 PIPING SUPPORT
		TABLE 305.4 PIPING SUPPORT SPACINGa
	SECTION 306 ACCESS AND SERVICE SPACE
	SECTION 307 CONDENSATE DISPOSAL
		TABLE 307.2.2 CONDENSATE DRAIN SIZING
	SECTION 308 CLEARANCE REDUCTION
		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
	SECTION 401 GENERAL
		TABLE 401.5 OPENING SIZES IN LOUVERS, GRILLES AND SCREENS PROTECTING AIR INTAKE OPENINGS
	SECTION 402 NATURAL VENTILATION
	SECTION 403 MECHANICAL VENTILATION
		EQUATION 4-1
		TABLE 403.3.1.1.1.2 ZONE AIR DISTRIBUTION EFFECTIVENESSa,b,c,d
		EQUATION 4-2
		EQUATION 4-3
		EQUATION 4-4
		EQUATION 4-5
		TABLE 403.3.1.1.2.3.2 SYSTEM VENTILATION EFFICIENCYa,b
		EQUATION 4-6
		EQUATION 4-7
		EQUATION 4-8
		EQUATION 4-9
		TABLE 403.3.1.1 MINIMUM VENTILATION RATES
			TABLE 403.3.1.1—continued MINIMUM VENTILATION RATES
			TABLE 403.3.1.1—continued MINIMUM VENTILATION RATES
			TABLE 403.3.1.1—continued MINIMUM VENTILATION RATES
		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
	SECTION 501 GENERAL
	SECTION 502 REQUIRED SYSTEMS
		EQUATION 5-1
	SECTION 503 MOTORS AND FANS
	SECTION 504 CLOTHES DRYER EXHAUST
		TABLE 504.8.4.1 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
		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 FIRE SUPPRESSION SYSTEMS
	SECTION 510 HAZARDOUS EXHAUST SYSTEMS
		TABLE 510.9 MINIMUM DUCT THICKNESS
		TABLE 510.9.2 CLEARANCE TO COMBUSTIBLES
	SECTION 511 DUST, STOCK AND REFUSE CONVEYING SYSTEMS
		TABLE 511.2 CONSTRUCTION, CLEARANCE AND TERMINATION REQUIREMENTS FOR SINGLE-WALL METAL CHIMNEYS
	SECTION 512 SUBSLAB SOIL EXHAUST SYSTEMS
	SECTION 513 SMOKE CONTROL SYSTEMS
		EQUATION 5-2
		EQUATION 5-3
	SECTION 514 ENERGY RECOVERY VENTILATION SYSTEMS
CHAPTER 6 DUCT SYSTEMS
	SECTION 601 GENERAL
	SECTION 602 PLENUMS
	SECTION 603 DUCT CONSTRUCTION AND INSTALLATION
		TABLE 603.4 DUCT CONSTRUCTION MINIMUM SHEET METAL THICKNESS FOR SINGLE DWELLING UNITSa
	SECTION 604 INSULATION
	SECTION 605 AIR FILTERS
	SECTION 606 SMOKE DETECTION SYSTEMS CONTROL
	SECTION 607 DUCT AND TRANSFER OPENINGS
		[BF] TABLE 607.3.2.1 FIRE DAMPER RATING
CHAPTER 7 COMBUSTION AIR
	SECTION 701 GENERAL
CHAPTER 8 CHIMNEYS AND VENTS
	SECTION 801 GENERAL
	SECTION 802 VENTS
		TABLE 802.2 VENT APPLICATION
	SECTION 803 CONNECTORS
		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
	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 HIGH-VOLUME LARGE-DIAMETER FANS
CHAPTER 10 BOILERS, WATER HEATERS AND PRESSURE VESSELS
	SECTION 1001 GENERAL
	SECTION 1002 WATER HEATERS
	SECTION 1003 PRESSURE VESSELS
	SECTION 1004 BOILERS
		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
		EQUATION 10-1
		TABLE 1009.2 CLOSED-TYPE EXPANSION TANK SIZING
	SECTION 1010 GAUGES
	SECTION 1011 TESTS
CHAPTER 11 REFRIGERATION
	SECTION 1101 GENERAL
	SECTION 1102 SYSTEM REQUIREMENTS
	SECTION 1103 REFRIGERATION SYSTEM CLASSIFICATION
		TABLE 1103.1 REFRIGERANT CLASSIFICATION, AMOUNT AND OEL
			TABLE 1103.1—continued REFRIGERANT CLASSIFICATION, AMOUNT AND OEL
			TABLE 1103.1—continued REFRIGERANT CLASSIFICATION, AMOUNT AND OEL
			TABLE 1103.1—continued REFRIGERANT CLASSIFICATION, AMOUNT AND OEL
			TABLE 1103.1—continued REFRIGERANT CLASSIFICATION, AMOUNT AND OEL
	SECTION 1104 SYSTEM APPLICATION REQUIREMENTS
		TABLE 1104.3.2 MAXIMUM PERMISSIBLE QUANTITIES OF REFRIGERANTS
	SECTION 1105 MACHINERY ROOM, GENERAL REQUIREMENTS
		EQUATION 11-1
		EQUATION 11-2
	SECTION 1106 MACHINERY ROOM, SPECIAL REQUIREMENTS
		TABLE 1106.5.2 MINIMUM EXHAUST RATES
	SECTION 1107 REFRIGERANT PIPING
	SECTION 1108 FIELD TEST
	[F] SECTION 1109 PERIODIC TESTING
CHAPTER 12 HYDRONIC PIPING
	SECTION 1201 GENERAL
	SECTION 1202 MATERIAL
		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
	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
CHAPTER 13 FUEL OIL PIPING AND STORAGE
	SECTION 1301 GENERAL
	SECTION 1302 MATERIAL
		TABLE 1302.3 FUEL OIL PIPING
	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
	SECTION 1401 GENERAL
	SECTION 1402 DESIGN AND INSTALLATION
	SECTION 1403 HEAT TRANSFER FLUIDS
	SECTION 1404 LABELING
CHAPTER 15 REFERENCED STANDARDS
	ACCA
	AHRI
	AMCA
	ANSI
	ASHRAE
	ASME
	ASSE
	ASSE
	ASTM
	AWS
	AWWA
	CPSC
	CSA
	DOL
	FDA
	FS
	ICC
	IIAR
	MSS
	NAIMA
	NBBI
	NFPA
	NSF
	SMACNA
	UL
APPENDIX A CHIMNEY CONNECTOR PASS-THROUGHS
	FIGURE A-1 CHIMNEY CONNECTOR SYSTEMS
		FIGURE A-1—continued CHIMNEY CONNECTOR SYSTEMS
APPENDIX B RECOMMENDED PERMIT FEE SCHEDULE
	B101 MECHANICAL WORK, OTHER THAN GAS PIPING SYSTEMS
	B102 FEE FOR REINSPECTION
	B103 TEMPORARY OPERATION INSPECTION FEE
	B104 SELF-CONTAINED UNITS LESS THAN 2 TONS
INDEX
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