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ICC IFGC Commentary 2012

ICC IFGC Commentary 2012

$62.29

International Fuel Gas Code and Commentary

Published By Publication Date Number of Pages
ICC 2012 417
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A practical tool that helps you to master the code you deal with every day!This comprehensive publication provides a convenient reference for regulations in the 2012 International Fuel Gas Code

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PDF Pages PDF Title
1 2012 IFGC CODE AND COMMENTARY
3 COPYRIGHT© 2012
4 PREFACE
8 CHAPTER 1: SCOPE AND ADMINISTRATION
GENERAL COMMENTS
PURPOSE
PART 1—SCOPE AND APPLICATION
SECTION 101 (IFGC) GENERAL
10 SECTION 102 (IFGC) APPLICABILITY
12 PART 2—ADMINISTRATION AND ENFORCEMENT
SECTION 103 (IFGC) DEPARTMENT OF INSPECTION
SECTION 104 (IFGC) DUTIES AND POWERS OF THE CODE OFFICIAL
14 SECTION 105 (IFGC) APPROVAL
16 SECTION 106 (IFGC) PERMITS
19 SECTION 107 (IFGC) INSPECTIONS AND TESTING
22 SECTION 108 (IFGC) VIOLATIONS
24 SECTION 109 (IFGC) MEANS OF APPEAL
26 SECTION 110 (IFGC) TEMPORARY EQUIPMENT, SYSTEMS AND USES
28 CHAPTER 2: DEFINITIONS
GENERAL COMMENTS
PURPOSE
SECTION 201 (IFGC) GENERAL
SECTION 202 (IFGC) GENERAL DEFINITIONS
30 FIGURE 202(1) ANODELESS RISERS
31 FIGURE 202(2) BAROMETRIC DRAFT REGULATOR
32 FIGURE 202(3) LABEL FOR LOW-PRESSURE BOILER
34 FIGURE 202(4) FACTORY-BUILT CHIMNEYS
FIGURE 202(5) AIR-COOLED FACTORY-BUILT CHIMNEY SECTION
37 FIGURE 202(6) DIRECT-VENT APPLIANCE
FIGURE 202(7) DIRECT-VENT APPLIANCE
38 FIGURE 202(8) DRAFT-HOOD-EQUIPPED APPLIANCE
41 FIGURE 202(9) CHIMNEY FLUE LINER SYSTEM FOR GAS APPLIANCE
42 FIGURE 202(10) GAS CONVENIENCE OUTLET
FIGURE 202(11) GAS CONVENIENCE OUTLET
45 FIGURE 202(12) TYPCIAL APPLIANCE LABEL
46 FIGURE 202(13) TYPICAL RESIDENTIAL GAS METER SETTING
47 FIGURE 202(14) VENT OFFSET
FIGURE 202(15) OXYGEN DEPLETION SAFETY SHUTOFF
48 FIGURE 202(16) QUICK-DISCONNECT DEVICE
50 FIGURE 202(17) SERVICE REGULATOR
51 FIGURE 202(18) UNVENTED ROOM HEATER
52 FIGURE 202(19) TRANSITION FITTINGS
53 FIGURE 202(20) TYPE B VENT
55 BIBLIOGRAPHY
56 CHAPTER 3: GENERAL REGULATIONS
GENERAL COMMENTS
PURPOSE
SECTION 301 (IFGC) GENERAL
59 FIGURE 301.5(1) TYPCIAL LABEL FOR A CATEGORY I GAS-FIRED FURNACE
60 FIGURE 301.5(2) ROOFTOP HVAC UNIT LABEL
61 SECTION 302 (IFGC) STRUCTURAL SAFETY
63 FIGURE 302.3.2(1) CUTTING, NOTCHING AND BORING IN JOIST
FIGURE 302.3.2(2) BORING JOISTS
64 FIGURE 302.3.3 BORING AND NOTCHING OF STUDS
65 SECTION 303 (IFGC) APPLIANCE LOCATION
66 FIGURE 303.3(1) UNVENTED WALL-MOUNTED ROOM HEATER
67 FIGURE 303.3(2) APPLIANCE ENCLOSURE
FIGURE 303.4 APPLIANCE PROTECTED FROM VEHICLE IMPACT
68 SECTION 304 (IFGS) COMBUSTION, VENTILATION AND DILUTION AIR
69 FIGURE 304.1(1) THE CHEMISTRY OF IDEAL COMBUSTION
FIGURE 304.1(2) THE CHEMISTRY OF INCOMPLETE COMBUSTION
70 FIGURE 304.1(3) COMBUSTION AIR SUPPLY METHODS
71 FIGURE 304.1(4) DIRECT-VENT APPLIANCE
FIGURE 304.1(5) DIRECT COMBUSTION AIR CONNECTION TO THE OUTDOORS
73 FIGURE 304.4 DEPLETION OF COMBUSTION AIR
(EQUATION 3-1)
(EQUATION 3-2)
74 FIGURE 304.5.3 ALL AIR FROM INSIDE THE BUILDING
75 TABLE 304.5.2 CALCULATED VOLUMES
77 FIGURE 304.5.3.2 COMBINING SPACES IN DIFFERENT STORIES
78 FIGURE 304.6.1(1) ALL AIR FROM OUTDOORS—INLET AIR FROM VENTILATED CRAWL SPACE AND OUTLET AIR TO VENTILATED ATTIC
FIGURE 304.6.1(2) ALL AIR FROM OUTDOORS THROUGH VENTILATED ATTIC
FIGURE 304.6.1(3) ALL AIR FROM OUTDOORS
79 FIGURE 304.6.2 SINGLE COMBUSTION AIR OPENING, ALL AIR FROM THE OUTDOORS
80 Example 1:
81 FIGURE 304.7.3 ROOM CONFIGURATION USED IN EXAMPLE 2
82 FIGURE 304.8(1) MECHANICAL COMBUSTION AIR/MAKEUP AIR SUPPLY SYSTEM
FIGURE 304.8(2) MECHANICAL COMBUSTION AIR SUPPLY SYSTEM
83 FIGURE 304.8(3) MECHANICAL COMBUSTION AIR/MAKEUP AIR SUPPLY SYSTEM
FIGURE 304.9 MECHANICALLY SUPPLIED COMBUSTION AIR
84 FIGURE 304.9.2 SIMPLIFIED EXAMPLE SCHEMATIC OF INTERLOCK BETWEEN APPLIANCE AND POWER COMBUSTION AIR UNIT
86 FIGURE 304.10 SIMPLIFIED EXAMPLE SCHEMATIC OF COMBUSTION AIR DAMPER/APPLIANCE INTERLOCK
87 FIGURE 304.11 COMMON DUCT PROHIBITED
SECTION 305 (IFGC) INSTALLATION
89 FIGURE 305.3(1) GAS-FIRED WATER HEATER INSTALLATION IN A GARAGE
90 FIGURE 305.3(2) SOURCES OF IGNITION ELEVATED IN PRIVATE GARAGE
FIGURE 305.3(3) GARAGE SPACE VS. LIVING SPACE
FIGURE 305.3(4) EXAMPLE OF FLAMMABLE VAPOR IGNITION RESISTANTWATER HEATER TECHNOLOGY
91 FIGURE 305.3(5) EXAMPLE OF FLAMMABLE VAPOR IGNITION RESISTANT WATER HEATER TECHNOLOGY
FIGURE 305.3(6) EXAMPLE OF FLAMMABLE VAPOR IGNITION RESISTANT WATER HEATER TECHNOLOGY
FIGURE 305.3.1 ELEVATION OF APPLIANCES NOT REQUIRED
93 FIGURE 305.5(1) SUSPENDED UNIT HEATER
FIGURE 305.5(2) PROTECTED BY WALLS
94 FIGURE 305.5(3) PROTECTED BY GUARDS
FIGURE 305.5(4) PROTECTED BY A PLATFORM
95 FIGURE 305.5(5) PROTECTED BY A CURB STOP
96 SECTION 306 (IFGC) ACCESS AND SERVICE SPACE
97 FIGURE 306.3 ATTIC FURNACE INSTALLATION
98 FIGURE 306.4 CRAWL SPACE FURNACE INSTALLATION
100 FIGURE 306.5 APPLIANCE ACCESS
FIGURE 306.5.1 ROOFTOP HVAC UNIT WITH WORK PLATFORM
101 FIGURE 306.6(1) GUARDS
102 SECTION 307 (IFGC) CONDENSATE DISPOSAL
FIGURE 306.6(2) ROOF PLAN VIEW
103 FIGURE 307.4 AUXILIARY DRAIN PAN REQUIRED (WITH OR WITHOUT COOLING COIL)
104 SECTION 308 (IFGS) CLEARANCE REDUCTION
105 FIGURE 308.1 CLEARANCE TO COMBUSTIBLES—EXAMPLES OF HOW TO MEASURE
106 FIGURE 308.2(1) EXTENT OF PROTECTION NECESSARY TO REDUCE CLEARANCES FROM APPLIANCE OR VENT CONNECTIONS
FIGURE 308.2(3) MASONRY CLEARANCE REDUCTION SYSTEM
FIGURE 308.2(2) WALL PROTECTOR CLEARANCE REDUCTION SYSTEM
107 TABLE 308.2 A THROUGH K REDUCTION OF CLEARANCES WITH SPECIFIED FORMS OF PROTECTION
108 FIGURE 308.2 REDUCED CLEARANCE TO COMBUSTIBLES
110 SECTION 309 (IFGC) ELECTRICAL
SECTION 310 (IFGS) ELECTRICAL BONDING
111 FIGURE 310.1 GAS PIPE BONDING BY APPLIANCE BRANCH CIRCUIT
112 FIGURE 310.1.1(1) CSST BONDING
113 FIGURE 310.1.1(2) ALTERNATIVE LOCATION FOR BONDING CLAMP
BIBLIOGRAPHY
114 CHAPTER 4: GAS PIPING INSTALLATIONS
GENERAL COMMENTS
PURPOSE
FIGURE 400 GAS FLAMMABILITY LIMITS
115 SECTION 401 (IFGC) GENERAL
FIGURE 401.1(1) SCOPE OF CODES
116 FIGURE 401.1(2) TYPICAL POINT OF DELIVERY FOR NATURAL GAS SERVICE
118 SECTION 402 (IFGS) PIPE SIZING
119 TABLE 402.2 APPROXIMATE GAS INPUT FOR TYPICAL APPLIANCES
120 EQUATION 4-1
EQUATION 4-2
TABLE 402.4CR AND Y VALUES FOR NATURAL GAS AND UNDILUTED PROPANE AT STANDARD CONDITIONS
FIGURE 402.4 GAS PIPING LAYOUT
122 FIGURE 402.4.1 STEEL PIPE BRANCH SYSTEM FOR ROOFTOP UNITS
FIGURE 402.4.2(1) BRANCH PIPING SYSTEM WITH SCHEDULE 40 STEEL PIPE TRUNKLINE AND CSST BRANCHES
123 FIGURE 402.4.2(2) SINGLE PRESSURE CSST MANIFOLD SYSTEM
124 BRANCH LENGTH METHOD [COMMENTARY FIGURE 402.4.2(2)] EXAMPLE 2:
SUMMARY TABLE FOR BRANCH LENGTH METHOD EXAMPLE 2
125 HYBRID PRESSURE [COMMENTARY FIGURE 402.4.3(1)]EXAMPLE 1:
HYBRID PRESSURE [COMMENTARY FIGURE 402.4.3(2)EXAMPLE 2:
SUMMARY TABLE FOR HYBRID PRESSURE EXAMPLE 2
126 FIGURE 402.4.3(1) HYBRID PRESSURE BRANCH SYSTEM
FIGURE 402.4.3(2) HYBRID PRESSURE PARALLEL DISTRIBUTION SYSTEM
128 TABLE 402.4(1) SCHEDULE 40 METALLIC PIPE
129 TABLE 402.4(2) SCHEDULE 40 METALLIC PIPE
130 TABLE 402.4(3) SCHEDULE 40 METALLIC PIPE
131 TABLE 402.4(4) SCHEDULE 40 METALLIC PIPE
132 TABLE 402.4(5) SCHEDULE 40 METALLIC PIPE
133 TABLE 402.4(6) SCHEDULE 40 METALLIC PIPE
134 TABLE 402.4(7) SCHEDULE 40 METALLIC PIPE
135 TABLE 402.4(8) SEMIRIGID COPPER TUBING
136 TABLE 402.4(9) SEMIRIGID COPPER TUBING
137 TABLE 402.4(10) SEMIRIGID COPPER TUBING
138 TABLE 402.4(11) SEMIRIGID COPPER TUBING
139 TABLE 402.4(12) SEMIRIGID COPPER TUBING
140 TABLE 402.4(13) SEMIRIGID COPPER TUBING
141 TABLE 402.4(14) SEMIRIGID COPPER TUBING
142 TABLE 402.4(15) CORRUGATED STAINLESS STEEL TUBING (CSST)
143 TABLE 402.4(16) CORRUGATED STAINLESS STEEL TUBING (CSST)
144 TABLE 402.4(17) CORRUGATED STAINLESS STEEL TUBING (CSST)
145 TABLE 402.4(18) CORRUGATED STAINLESS STEEL TUBING (CSST)
146 TABLE 402.4(19) CORRUGATED STAINLESS STEEL TUBING (CSST)
147 TABLE 402.4(20) POLYETHYLENE PLASTIC PIPE
148 TABLE 402.4(21) POLYETHYLENE PLASTIC PIPE
149 TABLE 402.4(22) POLYETHYLENE PLASTIC PIPE
150 TABLE 402.4(23) POLYETHYLENE PLASTIC TUBING
TABLE 402.4(24) POLYETHYLENE PLASTIC TUBING
151 TABLE 402.4(25) SCHEDULE 40 METALLIC PIPE
152 TABLE 402.4(26) SCHEDULE 40 METALLIC PIPE
153 TABLE 402.4(27) SCHEDULE 40 METALLIC PIPE
154 TABLE 402.4(28) SCHEDULE 40 METALLIC PIPE
155 TABLE 402.4(29) SEMIRIGID COPPER TUBING
156 TABLE 402.4(30) SEMIRIGID COPPER TUBING
157 TABLE 402.4(31) SEMIRIGID COPPER TUBING
158 TABLE 402.4(32) CORRUGATED STAINLESS STEEL TUBING (CSST)
159 TABLE 402.4(33) CORRUGATED STAINLESS STEEL TUBING (CSST)
160 TABLE 402.4(34) CORRUGATED STAINLESS STEEL TUBING (CSST)
161 TABLE 402.4(35) POLYETHYLENE PLASTIC PIPE
162 TABLE 402.4(36) POLYETHYLENE PLASTIC PIPE
163 TABLE 402.4(37) POLYETHYLENE PLASTIC TUBING
164 SECTION 403 (IFGS) PIPING MATERIALS
FIGURE 403.5 PLASTIC-SHEATHED COPPER TUBING
165 FIGURE 403.5.4(1) CSST AND SYSTEM COMPONENTS
FIGURE 403.5.4(2) CSST FITTING
166 FIGURE 403.5.4(3) CSST FITTING
FIGURE 403.5.4(4) CSST FITTING
FIGURE 403.5.4(5) MULTIPORT MANIFOLD INSTALLATION USING CSST
FIGURE 403.5.4(6) TOP PLATE TUBING PROTECTION SHIELD
167 FIGURE 403.5.4(7) LOW-PRESSURE GAS PIPING SYSTEM USING CSST
FIGURE 403.5.4(8) MEDIUM-PRESSURE GAS PIPING SYSTEM USING CSST
168 FIGURE 403.5.4(9) CSST MANUFACTURED FOR UNDERGROUND INSTALLATION
169 FIGURE 403.5.4(10) EXCERPT FROM CSST MANUFACTURER’S INSTALLATION INSTRUCTIONS
FIGURE 403.5.4(11) EXCERPT FROM CSST MANUFACTURER’S INSTALLATION INSTRUCTIONS
FIGURE 403.5.4(12) MANIFOLD FOR 2 PSI PARALLEL DISTRIBUTION SYSTEM
170 FIGURE 403.5.4(13) “STUB-OUT” TERMINATION TRANSITION FITTING
FIGURE 403.5.4(14) “VALVE BOX” TERMINATION TRANSITION FITTING
FIGURE 403.5.4(15) TERMINATION TRANSITION FITTING
171 FIGURE 403.6.1(1) SERVICE HEAD ADAPTERS
FIGURE 403.6.1(2) SERVICE HEAD ADAPTERS
FIGURE 403.6.1(3) FLEXIBLE ANODELESS RISER
173 FIGURE 403.9 TAPERED THREAD COUPLING IN CONNECTION TO FURNACE
TABLE 403.9.2 SPECIFICATIONS FOR THREADING METALLIC PIPE
174 FIGURE 403.10.2 PRESS-CONNECT COPPER FITTING
176 FIGURE 403.11(1) MECHANICAL JOINTS
FIGURE 403.11(2) MECHANICAL JOINT
177 FIGURE 403.11(3) PLASTIC PIPE TRANSITION FITTING
FIGURE 403.11(4) PLASTIC PIPE TRANSITION FITTING
178 FIGURE 403.12 FLANGED JOINTS
SECTION 404 (IFGC) PIPING SYSTEM INSTALLATION
179 FIGURE 404.3 PROHIBITED TOWNHOUSE INSTALLATION
180 FIGURE 404.6 ABOVE GRADE ENTRANCE/EXIT
181 FIGURE 404.7 PIPE PROTECTION
FIGURE 404.8 PIPING IN SOLID FLOORS
182 FIGURE 404.8.2 PIPE UNDER SLAB BETWEEN INTERIOR POINTS
183 FIGURE 404.10 LP-GAS PIPING ISOLATION
184 FIGURE 404.12 MINIMUM BURIAL DEPTH
186 FIGURE 404.17.1 PIPING UNDER SLABS
187 SECTION 405 (IFGS) PIPING BENDS AND CHANGES IN DIRECTION
188 SECTION 406 (IFGS) INSPECTION, TESTING AND PURGING
189 FIGURE 406.1.4 PIPING ISOLATION ARRANGEMENT FOR TESTING
190 FIGURE 406.3.3 MANUFACTURER’S WARNING REGARDING PRESSURE TESTING OF GAS PIPING
191 FIGURE 406.4(1) TYPICAL TEST SET-UP FOR AIR PRESSURE TESTING
FIGURE 406.4(2) ELECTRONIC PRESSURE GAUGE
FIGURE 406.4(3) LEAK DETECTOR INSTRUMENT
192 FIGURE 406.4(4) ELECTRONIC LEAK DETECTOR INSTRUMENT
195 TABLE 406.7.1.1 SIZE AND LENGTH OF PIPING
197 SECTION 407 (IFGC) PIPING SUPPORT
SECTION 408 (IFGC) DRIPS AND SLOPED PIPING
198 FIGURE 408.4 METHOD OF INSTALLING A TEE FITTING SEDIMENT TRAP
199 FIGURE 408.4(1) EFFECTIVE SEDIMENT TRAP
FIGURE 408.4(2) LESS EFFECTIVE SEDIMENT TRAP CONFIGURATION
200 SECTION 409 (IFGC) SHUTOFF VALVES
TABLE 409.1.1 MANUAL GAS VALVE STANDARDS
FIGURE 409.1.1(1) TYPICAL BALL-TYPE GAS SHUTOFF VALVE
FIGURE 409.1.1(2) BALL-TYPE GAS SHUTOFF VALVE DESIGNED TO MATE WITH A CONNECTOR
201 FIGURE 409.5.1 SHUTOFF VALVE IN CONTROL COMPARTMENT OF GAS FIREPLACE
203 SECTION 410 (IFGC) FLOW CONTROLS
FIGURE 410.1(1) GAS PRESSURE REGULATORS
204 FIGURE 410.1(2) SERVICE REGULATOR
FIGURE 410.1(3) GAS PRESSURE REGULATOR
205 FIGURE 410.1(4) SYSTEM PRESSURES
206 FIGURE 410.2(1) SYSTEM PRESSURES
FIGURE 410.2(2) PRESSURE REGULATOR/OVERPRESSURE PROTECTION DEVICE ASSEMBLIES
207 FIGURE 410.3(1) REGULATOR WITH VENT PROTECTION
FIGURE 410.3(2) PRESSURE REGULATOR WITH VENT-LIMITING DEVICE
208 FIGURE 410.4 EXAMPLE OF EXCESS FLOW VALVE
SECTION 411 (IFGC) APPLIANCE AND MANUFACTURED HOME CONNECTIONS
209 FIGURE 411.1(1) PIPING SYSTEM SIZING AND APPLIANCE CONNECTION AND CONNECTOR SIZING
FIGURE 411.1(2) QUICK-DISCONNECT DEVICE FOR USE WITH COMMERCIAL APPLIANCE CONNECTORS
FIGURE 411.1(3) QUICK-DISCONNECT DEVICE FOR USE WITH COMMERCIAL APPLIANCE CONNECTORS
210 FIGURE 411.1(4) CSST DIRECTLY CONNECTED TO NONMOVEABLE APPLIANCE
FIGURE 411.1(5) CSST TERMINATED AT APPLIANCE LOCATION
211 FIGURE 411.1(6) SEMI-RIGID (FLEXIBLE) APPLIANCE CONNECTOR
FIGURE 411.1(7) OUTDOOR MOBILE HOME CONNECTOR
FIGURE 411.1.1(1) COMMERCIAL COOKING APPLIANCE CONNECTOR WITH TRAVEL RESTRAINT
FIGURE 411.1.1(2) COMMERCIAL COOKING APPLIANCE CONNECTOR WITH TRAVEL RESTRAINT
212 FIGURE 411.1.1(3) COMMERCIAL COOKING APPLIANCE FUEL CONNECTORS
FIGURE 411.1.1(4) COMMERCIAL COOKING APPLIANCE FUEL CONNECTORS
213 FIGURE 411.1.3.1(1) APPLIANCE FUEL CONNECTOR
FIGURE 411.1.3.1(2) APPLIANCE FUEL CONNECTOR
214 FIGURE 411.1.3.3 CONNECTOR PIPING DOWNSTREAM OF SHUTOFF VALVE
216 FIGURE 411.3(1) EXAMPLE OF ONE MANUFACTURER’S INSTALLATION INSTRUCTIONS
FIGURE 411.3(2) END VIEW OF FIGURE 411.3(1)
SECTION 412 (IFGC) LIQUEFIED PETROLEUM GAS MOTOR VEHICLE FUEL-DISPENSING FACILITIES
217 SECTION 413 (IFGC) COMPRESSED NATURAL GAS MOTOR VEHICLE FUEL-DISPENSING FACILITIES
218 FIGURE 413.1 CNG FUEL-DISPENSING STATION
221 [F] TABLE 413.9.2.3 SEPARATION DISTANCE FOR ATMOSPHERIC VENTING OF CNG
SECTION 414 (IFGC) SUPPLEMENTAL AND STANDBY GAS SUPPLY
SECTION 415 (IFGS) PIPING SUPPORT INTERVALS
222 TABLE 415.1 SUPPORT OF PIPING
SECTION 416 (IFGS) OVERPRESSURE PROTECTION DEVICES
224 BIBLIOGRAPHY
226 CHAPTER 5: CHIMNEYS AND VENTS
GENERAL COMMENTS
PURPOSE
SECTION 501 (IFGC) GENERAL
227 FIGURE 501.6 VENT DESIGNED FOR CATEGORY III AND IV (POSITIVE PRESSURE) APPLICATIONS
230 FIGURE 501.13(1) MASONRY CHIMNEY RELINING SYSTEM
FIGURE 501.13(2) MASONRY CHIMNEY RELINING SYSTEM
FIGURE 501.13(3) MASONRY CHIMNEY RELINING BY INSTALLATION OF TYPE B VENT SYSTEM
231 FIGURE 501.13(4) MASONRY CHIMNEY RELINING SYSTEM
FIGURE 501.14 SPECIAL VENT SYSTEM FOR CATEGORY II, III and IV APPLIANCES
232 FIGURE 501.15.1 APPLIANCE REPLACEMENTS AFFECTING EXISTING APPLIANCES
233 SECTION 502 (IFGC) VENTS
FIGURE 502.1(1) CATEGORY I FAN-ASSISTED FURNACE
234 FIGURE 502.1(2) CATEGORY IV APPLIANCE (FURNACE)
FIGURE 502.1(3) TYPE B GAS VENT SERVING TWO CATEGORY I APPLIANCES
235 FIGURE 502.1(4) TYPE B VENT SECTIONS WITH AIR SPACE BETWEEN PIPE WALLS
236 FIGURE 502.7 PLAN VIEW OF STUD WALL
SECTION 503 (IFGS) VENTING OF APPLIANCES
237 FIGURE 503.2.3(1) DIRECT-VENT APPLIANCE
FIGURE 503.2.3(2) DIRECT-VENT(SEPARATED COMBUSTION)
238 FIGURE 503.2.3(3) EXAMPLE OF MANUFACTURER’S DETAIL FOR DIRECT-VENT APPLIANCE CONCENTRIC VENT-AIR INTAKE TERMINAL
FIGURE 503.2.3(4) DIRECT-VENT APPLIANCES
FIGURE 503.2.3(5) GRAVITY DIRECT-VENT WATER HEATER
FIGURE 503.2.3(6) DIRECT-VENT SYSTEM COMPONENTS
239 FIGURE 503.2.4(1) HOT WATER BOILER WITH INTEGRAL VENT FOR OUTDOOR INSTALLATION
FIGURE 503.2.4(2) OUTDOOR DUCT FURNACE WITH INTEGRAL POWER VENTING
240 FIGURE 503.2.4(3) ROOFTOP HVAC UNIT WITH INTEGRAL POWER VENT
FIGURE 503.3.3(1) VERTICAL DRAFT INDUCER
241 FIGURE 503.3.3(2) HORIZONTAL POWER EXHAUSTER
FIGURE 503.3.3(3) HORIZONTAL POWER EXHAUSTERS
242 FIGURE 503.3.3(4) VERTICAL POWER EXHAUSTERS
FIGURE 503.3.3(5) VERTICAL POWER EXHAUSTERS
243 FIGURE 503.3.3(6) POWER EXHAUSTER OUTDOOR TERMINAL-TYPE UNIT
FIGURE 503.3.3(7) EXHAUSTER AND CONTROL PACKAGE
FIGURE 503.3.3(8) TYPICAL POWER EXHAUSTER
244 FIGURE 503.3.3(9) TYPICAL EXHAUSTER APPLICATIONS
FIGURE 503.3.3(10) DRAFT INDUCER
FIGURE 503.3.3(11) DRAFT INDUCER
245 FIGURE 503.3.3(12) POWER-VENTED WATER HEATER
FIGURE 503.3.3(13) DRAFT CONDITIONS WITH EQUIPMENT BURNER-INLET BLOWER
FIGURE 503.3.3(14) SIMPLIFIED SAMPLE INTERLOCK CIRCUIT DIAGRAM FOR APPLIANCE SERVED BY POWER EXHAUSTER
246 FIGURE 503.3.6 VENTS THROUGH AIR PLENUMS
247 FIGURE 503.4 DETERMINING VENT HEIGHT
TABLE 503.4 TYPE OF VENTING SYSTEM TO BE USED
249 FIGURE 503.5.4(1) LOW-HEAT CHIMNEY TERMINATIONS
250 FIGURE 503.5.4(2) DECORATIVE SHROUDS
251 FIGURE 503.5.6.1(1) CHIMNEY LINING SYSTEM FOR GAS APPLIANCES
FIGURE 503.5.6.1(2) DIRECT-VENT APPLIANCE FOR INSTALLATION IN SOLID FUEL FIREPLACE
254 FIGURE 503.6.4 TERMINATION LOCATIONS FOR GAS VENTS WITH LISTED CAPS 12 INCHES OR LESS IN SIZE AT LEAST 8 FEET FROM A VERTICAL WALL
255 FIGURE 503.6.4 TOP LOCATION RULES
FIGURE 503.6.4.1 DECORATIVE SHROUDS
256 FIGURE 503.6.7 B-VENT TERMINATIONS WITH RESPECT TO FORCED AIR INTAKES
258 FIGURE 503.6.10.1(1) APPLIANCE AND VENT SEPARATED FROM LIVING SPACE
259 FIGURE 503.6.10.1(2) APPLIANCE CLOSETS ACCESSED FROM OUTDOOR BALCONY
260 FIGURE 503.6.11 FASTENER PENETRATIONS
263 FIGURE 503.8(1) MECHANICAL DRAFT VENTING SYSTEM EXHAUSTER TERMINATIONS
264 FIGURE 503.8(2) EXAMPLE OF MANUFACTURER’S DETAIL FOR DIRECT-VENT APPLIANCE
FIGURE 503.8(3) EXAMPLE OF MANUFACTURER’S DETAIL FOR DIRECT-VENT APPLIANCE VENT AND COMBUSTION AIR TERMINALS
265 FIGURE 503.8(4) DIRECT-VENT HOT WATER BOILER
266 FIGURE 503.10.2.2 LISTED BENDABLE DOUBLE-WALL CONNECTOR
TABLE 503.10.2.4 MINIMUM THICKNESS FOR GALVANIZED STEEL VENT CONNECTORS FOR LOW-HEAT APPLIANCES
267 TABLE 503.10.2.5 MINIMUM THICKNESS FOR STEEL VENT CONNECTORS FOR MEDIUM-HEAT APPLIANCES
268 FIGURE 503.10.3.4(2) COMMON VENT OFFSET AND MANIFOLD
FIGURE 503.10.3.4(1) MANIFOLD SIZING
269 FIGURE 503.10.4.1 OPPOSING OPENINGS IN CHIMNEY
TABLE 503.10.5A CLEARANCES FOR CONNECTORS
271 FIGURE 503.10.8 VENT HEIGHT
272 FIGURE 503.10.14 TYPE B VENT CONNECTOR PENETRATIONS
273 FIGURE 503.12.1 DRAFT-HOOD-EQUIPPED APPLIANCE
275 FIGURE 503.14 AUTOMATIC VENT DAMPERS
276 SECTION 504 (IFGS) SIZING OF CATEGORY I APPLIANCE VENTING SYSTEMS
277 FIGURE 504.1(1) COMBUSTION PROCESS FOR NATURAL GAS
FIGURE 504.1(2) FLUE GAS COMPOSITION
FIGURE 504.1(3) DRAFT-HOOD APPLIANCE COMPARED TO FAN-ASSISTED APPLIANCE
278 FIGURE 504.1(4) ILLUSTRATION OF THE BASIC PRINCIPLE OFF AN-ASSISTED COMBUSTION
FIGURE 504.1(5) FAN-ASSISTED HOT WATER BOILER
280 FIGURE 504.2(1) EXAMPLE OF INDIVIDUAL VENT DIMENSIONS
FIGURE 504.2(2) INDIVIDUAL VENT—LATERAL AND HEIGHT
281 FIGURE 504.2.1 CATEGORY I NATURAL DRAFT HOT WATERBOILER WITH AUTOMATIC VENT DAMPER
284 FIGURE 504.2.9(1) MASONRY CHIMNEY COMPARED TO TYPE B VENT
FIGURE 504.2.9 HEIGHT ABOVE ROOF
286 FIGURE 504.2.9(2) EXTERIOR CHIMNEY SIZING-EXAMPLE
289 FIGURE 504.3(1) COMBINED VENT DIMENSIONS
290 FIGURE 504.3(2) FAN AND NAT VENT SIZING EXAMPLE
292 TABLE 504.3.2 MAXIMUM VENT CONNECTOR LENGTH
294 FIGURE 504.3.5 COMMON VENT OFFSET IN ATTIC FOR THE PURPOSE OF AVOIDING A STREET-SIDE ROOF PENETRATION
295 FIGURE 504.3.6(1) OFFSET IN COMMON VENT AND CONNECTORS
FIGURE 504.3.6(2) TYPE B VENT ADJUSTABLE 45-DEGREE ELBOW FITTING
FIGURE 504.3.6(3) TYPE B VENT ADJUSTABLE 90-DEGREE ELBOW FITTING
297 FIGURE 504.3.9(1) TYPE B VENT REDUCING TEE
FIGURE 504.3.9(2) TYPE B VENT REDUCING WYE
FIGURE 504.3.9.1 SINGLE-WALL TEES AND WYES PROHIBITED IN TYPE B COMMON VENT SYSTEMS
298 FIGURE 504.3.11 CONNECTOR RISE
300 FIGURE 504.3.20 EXTERIOR CHIMNEY SIZING—EXAMPLE
301 SECTION 505 (IFGC) DIRECT-VENT, INTEGRAL VENT,MECHANICAL VENT AND VENTILATION/EXHAUST HOOD VENTING
302 FIGURE 505.1.1(1) EXHAUST HOOD INTERLOCK WITH COOKING APPLIANCES (SOLENOID)
FIGURE 505.1.1(2) PROHIBITED SOLENOID VALVE BYPASS
303 SECTION 506 (IFGC) FACTORY-BUILT CHIMNEYS
FIGURE 506.1(1) FACTORY-BUILT CHIMNEY
FIGURE 506.1(2) AIR-COOLED FACOTRY-BUILT CHIMNEY SYSTEM
304 BIBLIOGRAPHY
305 504.2(1) TYPE B DOUBLE-WALL GAS VENT
306 TABLE 504.2(1)—CONTINUED TYPE B DOUBLE-WALL GAS VENT
307 TABLE 504.2(1)—CONTINUED TYPE B DOUBLE-WALL GAS VENT
308 TABLE 504.2(1)—CONTINUED TYPE B DOUBLE-WALL GAS VENT
309 TABLE 504.2(2) TYPE B DOUBLE-WALL GAS VENT
310 TABLE 504.2(2)-CONTINUED TYPE B DOUBLE-WALL GAS VENT
311 TABLE 504.2(3) MASONRY CHIMNEY
312 TABLE 504.2(3)—CONTINUED MASONRY CHIMNEY
313 TABLE 504.2(4) MASONRY CHIMNEY
314 TABLE 504.2(4)—CONTINUED MASONRY CHIMNEY
315 TABLE 504.2(5) SINGLE-WALL METAL PIPE OR TYPE B ASBESTOS CEMENT VENT
316 TABLE 504.2(6) EXTERIOR MASONRY CHIMNEY
317 TABLE 504.3(1) TYPE B DOUBLE-WALL VENT
318 TABLE 504.3(1)-CONTINUED TYPE B DOUBLE-WALL VENT
319 TABLE 504.3(2) TYPE B DOUBLE-WALL VENT
320 TABLE 504.3(3) MASONRY CHIMNEY
321 TABLE 504.3(4) MASONRY CHIMNEY
322 TABLE 504.3(5) SINGLE-WALL METAL PIPE OR TYPE ASBESTOS CEMENT VENT
323 TABLE 504.3(6A) EXTERIOR MASONRY CHIMNEY
TABLE 504.3(6B) EXTERIOR MASONRY CHIMNEY
TABLE 504.3(6B) EXTERIOR MASONRY CHIMNEY-CONTINUED
324 TABLE 504.3(7A) EXTERIOR MASONRY CHIMNEY
TABLE 504.3(7B) EXTERIOR MASONRY CHIMNEY
TABLE 504.3(7B) EXTERIOR MASONRY CHIMNEY—CONTINUED
326 CHAPTER 6: SPECIFIC APPLIANCES
GENERAL COMMENTS
PURPOSE
SECTION 601 (IFGC) GENERAL
SECTION 602 (IFGC) DECORATIVE APPLIANCES FOR INSTALLATION IN FIREPLACES
FIGURE 602.1 VENTED GAS LOG SET
328 FIGURE 602.2(1) COMBINATION GAS CONTROL
FIGURE 602.2(2) COMBINATION GAS CONTROL FOR APPLIANCES
329 SECTION 603 (IFGC) LOG LIGHTERS
SECTION 604 (IFGC) VENTED GAS FIREPLACES (DECORATIVE APPLIANCES)
FIGURE 604.1(1) VENTED DECORATIVE APPLIANCE
FIGURE 604.1(2) DIRECT-VENT DECORATIVE APPLIANCE
SECTION 605 (IFGC) VENTED GAS FIREPLACE HEATERS
330 FIGURE 604.1(3) DIRECT-VENT GAS FIREPLACE
FIGURE 605.1 VENTED GAS FIREPLACE HEATER
SECTION 606 (IFGC) INCINERATORS AND CREMATORIES
SECTION 607 (IFGC) COMMERCIAL-INDUSTRIAL INCINERATORS
331 SECTION 608 (IFGC) VENTED WALL FURNACES
SECTION 609 (IFGC) FLOOR FURNACES
332 FIGURE 609.1 FLOOR FURNACE
333 SECTION 610 (IFGC) DUCT FURNACES
FIGURE 610.1(1)I NTEGRAL POWER-VENTED OUTDOOR DUCT FURNACE
FIGURE 610.1(2) INTEGRAL GRAVITY-VENTED OUTDOOR DUCT FURNACE
FIGURE 610.1(3) OUTDOOR DUCT FURNACES WITH AIR HANDLER
334 FIGURE 610.1(4) DUCT FURNACE
SECTION 611 (IFGC) NONRECIRCULATING DIRECT-FIRED INDUSTRIAL AIR HEATERS
335 FIGURE 611.1 DIRECT-FIRED MAKE-UP AIR HEATER
336 SECTION 612 (IFGC) RECIRCULATING DIRECT-FIRED INDUSTRIAL AIR HEATERS
FIGURE 612.1(1) BASIC PRINCIPLE OF DIRECT-FIRED SPACE HEATING APPLIANCE
337 FIGURE 612.1(2) BASIC PRINCIPLE OF INDIRECT-FIRED SPACE HEATING APPLIANCE
338 SECTION 613 (IFGC) CLOTHES DRYERS
FIGURE 613.1 TYPE 1 CLOTHES DRYER LABEL
SECTION 614 (IFGC) CLOTHES DRYER EXHAUST
342 [M] TABLE 614.6.5.1 DRYER EXHAUST DUCT FITTING EQUIVALENT LENGTH
343 FIGURE 614.6.6 EXAMPLE OF A DRYER EXHAUST LENGTH LABEL
344 FIGURE 614.6.7 MULTIPLE DRYER EXHAUST SYSTEM
346 SECTION 615 (IFGC) SAUNA HEATERS
347 SECTION 616 (IFGC) ENGINE AND GAS TURBINE-POWERED EQUIPMENT
SECTION 617 (IFGC) POOL AND SPA HEATERS
SECTION 618 (IFGC) FORCED-AIR WARM-AIR FURNACES
349 SECTION 619 (IFGC) CONVERSION BURNERS
SECTION 620 (IFGC) UNIT HEATERS
350 FIGURE 620.1(1) DIRECT-VENT UNIT HEATER
FIGURE 620.1(2) POWER-VENTED UNIT HEATER
FIGURE 620.1(3) UNIT HEATER VENTING (TYPICAL)
351 FIGURE 620.1(4) DRAFT-HOOD-EQUIPPED UNIT HEATER
FIGURE 620.1(5) FUNDAMENTAL COMPONENTS OF UNIT HEATER
352 FIGURE 620.2 UNIT HEATER SUPPORT
SECTION 621 (IFGC) UNVENTED ROOM HEATERS
353 FIGURE 621.1(1) UNVENTED ROOM HEATER
FIGURE 621.2 UNVENTED ROOM HEATER (DECORATIVE)
FIGURE 621.1(2) FIREBOX FOR UNVENTED ROOM HEATER
354 SECTION 622 (IFGC) VENTED ROOM HEATERS
FIGURE 622.1(1) VENTED GAS FIREPLACE HEATER
FIGURE 622.1(2) VENTED ROOM HEATER
355 SECTION 623 (IFGC) COOKING APPLIANCES
FIGURE 623.1(1) COMMERCIAL OVEN
FIGURE 623.1(2) COMMERCIAL DECK OVEN
356 FIGURE 623.3(1) DOMESTIC (HOUSEHOLD) RANGE
FIGURE 623.3(2) HOUSEHOLD-TYPE COOKING APPLIANCE LABEL
357 FIGURE 623.7 CLEARANCE ABOVE COOKING TOP
SECTION 624 (IFGC) WATER HEATERS
358 FIGURE 624.2(1) DIRECT-VENT WATER HEATER DESIGNED FOR BOTH POTABLE WATER HEATING AND SPACE HEATING APPLICATIONS
SECTION 625 (IFGC) REFRIGERATORS
SECTION 626 (IFGC) GAS-FIRED TOILETS
SECTION 627 (IFGC) AIR-CONDITIONING APPLIANCES
359 FIGURE 624.2(2) WATER HEATER LABEL INDICATING SUITABILITY FOR BOTH POTABLE WATER HEATING AND SPACE HEATING
361 SECTION 628 (IFGC) ILLUMINATING APPLIANCES
SECTION 629 (IFGC) SMALL CERAMIC KILNS
SECTION 630 (IFGC) INFRARED RADIANT HEATERS
FIGURE 630.1(1) CERAMIC BURNER INFRARED RADIANT HEATER
362 FIGURE 630.1(2) TUBE-TYPE INFRARED RADIANT HEATER
FIGURE 630.1(3) TUBE-TYPE INFRARED RADIANT HEATER
363 FIGURE 630.1(4) SAMPLE LABEL INFRARED RADIANT TUBE HEATER
364 SECTION 631 (IFGC) BOILERS
SECTION 632 (IFGC) EQUIPMENT INSTALLED IN EXISTING UNLISTED BOILERS
SECTION 633 (IFGC) STATIONARY FUEL-CELL POWER SYSTEMS
365 FIGURE 631.1(1) STEAM HEATING BOILER WITH GAUGE-GLASS,LOW WATER CUTOFF CONTROL, PRESSURE GAUGE, PRESSURE LIMIT CONTROL AND AUTOMATIC VENT DAMPER
FIGURE 631.1(2) STEAM BOILER WITH POWER BURNER, LOW-WATERCUTOFF CONTROLS AND PRESSURE CONTROLS
FIGURE 631.2(1) ELECTRONIC PROBE-TYPE LOW-WATER CUTOFF CONTROL WITH GAUGE GLASS AND TRI-COCKS FOR STEAM BOILER APPLICATION
FIGURE 631.2(2) ELECTRONIC PROBE-TYPE LOW-WATER CUTOFF CONTROL FOR HOT WATER BOILER APPLICATION
FIGURE 631.2(3) ELECTRONIC PROBE-TYPE LOW-WATER CUTOFF CONTROL FOR HOT WATER BOILER APPLICATION
366 SECTION 634 (IFGS) CHIMNEY DAMPER OPENING AREA
TABLE 634.1 FREE OPENING AREA OF CHIMNEY DAMPER FOR VENTING FLUE GASES FROM UNLISTED DECORATIVE APPLIANCES FOR INSTALLATION IN VENTED FIREPLACES
SECTION 635 (IFGC) GASEOUS HYDROGEN SYSTEMS
SECTION 636 (IFGC) OUTDOOR DECORATIVE APPLIANCES
FIGURE 636.1 OUTDOOR (CAMPFIRE) DECORATIVE APPLIANCE
367 BIBLIOGRAPHY
368 CHAPTER 7: GASEOUS HYDROGEN SYSTEMS
GENERAL COMMENTS
PURPOSE
FIGURE 700(1) ELECTROLYSIS OF WATER
369 FIGURE 700(2) FUEL CELL PRINCIPLE OF OPERATION
FIGURE 700(3) FUEL CELL PRINCIPLE OF OPERATION
370 SECTION 701 (IFGC) GENERAL
SECTION 702 (IFGC) GENERAL DEFINITIONS
SECTION 703 (IFGC) GENERAL REQUIREMENTS
371 FIGURE 702.1 HYDROGEN-GENERATING APPLIANCE
373 SECTION 704 (IFGC) PIPING, USE AND HANDLING
376 SECTION 705 (IFGC) TESTING OF HYDROGEN PIPING SYSTEM
378 SECTION 706 (IFGC) LOCATION OF GASEOUS HYDROGEN SYSTEMS
SECTION 707 (IFGC) OPERATION AND MAINTENANCE OF GASEOUS HYDROGEN SYSTEMS
379 SECTION 708 (IFGC) DESIGN OF LIQUEFIED HYDROGEN SYSTEMS ASSOCIATED WITH HYDROGEN VAPORIZATION OPERATIONS
BIBLIOGRAPHY
380 CHAPTER 8: REFERENCED STANDARDS
GENERAL COMMENTS
PURPOSE
381 FIGURE 800 REFERENCED STANDARDS
382 ANSI
ASME
383 ASTM
CGA
CSA
384 DOTn
ICC
MSS
NFPA
385 UL
386 APPENDIX A (IFGS): SIZING AND CAPACITIES OF GAS PIPING
A.1 GENERAL PIPING CONSIDERATIONS
A.2 DESCRIPTION OF TABLES
A.2.1 GENERAL
A.2.2 LOW PRESSURE NATURAL GAS TABLES
A.2.3 UNDILUTED LIQUEFIED PETROLEUM TABLES
A.2.4 NATURAL GAS SPECIFIC GRAVITY
387 TABLE A.2.2 EQUIVALENT LENGTHS OF PIPE FITTINGS AND VALVES
388 TABLE A.2.2—CONTINUED EQUIVALENT LENGTHS OF PIPE FITTINGS AND VALVES
389 TABLE A.2.4 MULTIPLIERS TO BE USED WITH TABLES 402.4(1) THROUGH 402.4(22) WHERE THE SPECIFIC GRAVITY OF THE GAS IS OTHER THAN 0.60
A.2.5 HIGHER PRESSURE NATURAL GAS TABLES
A.3 USE OF CAPACITY TABLES
A.3.1 LONGEST LENGTH METHOD
A.3.2 BRANCH LENGTH METHOD
390 A.3.3 HYBRID PRESSURE METHOD
A.3.4 PRESSURE DROP PER 100 FEET METHOD
391 TABLE A.3.4 THOUSANDS OF BTU/H (MBH) OF NATURAL GAS PER 100 FEET OF PIPE AT VARIOUS PRESSURE DROPS AND PIPE DIAMETERS
A.4 USE OF SIZING EQUATIONS
A.5 PIPE AND TUBE DIAMETERS
TABLE A.5.1 SCHEDULE 40 STEEL PIPE STANDARD SIZES
392 TABLE A.5.2COPPER TUBE STANDARD SIZES
A.6 EXAMPLES OF PIPING SYSTEM DESIGN AND SIZING
A.6.1 EXAMPLE 1: LONGEST LENGTH METHOD
FIGURE A.6.1 PIPING PLAN SHOWING A STEEL PIPING SYSTEM
393 A.6.2 EXAMPLE 2: HYBRID OR DUAL PRESSURE SYSTEMS
FIGURE A.6.2 PIPING PLAN SHOWING A CSST SYSTEM
394 FIGURE A.6.3 PIPING SHOWING A COPPER TUBING SYSTEM
A.6.4 EXAMPLE 4: MODIFICATION TO EXISTING PIPING SYSTEM
FIGURE A.6.4 PIPING PLAN SHOWING A MODIFICATION TO EXISTING PIPING SYSTEM
A.6.5 EXAMPLE 5: CALCULATING PRESSURE DROPS DUE TO TEMPERATURE CHANGES
395 A.6.6 EXAMPLE 6: PRESSURE DROP PER 100 FEET OF PIPE METHOD
396 APPENDIX B (IFGS): SIZING OF VENTING SYSTEMS SERVING APPLIANCES EQUIPPED WITH DRAFT HOODS, CATEGORY I APPLIANCES AND APPLIANCES LISTED FOR USE WITH TYPE B VENTS
EXAMPLES USING SINGLE APPLIANCE VENTING TABLES
FIGURE B-1 TYPE B DOUBLE-WALL VENT SYSTEM SERVING A SINGLE APPLIANCE WITH A TYPE B DOUBLE-WALL VENT
FIGURE B-2 TYPE B DOUBLE-WALL VENT SYSTEM SERVING A SINGLE APPLIANCE WITH A SINGLE-WALL METAL VENT CONNECTOR
397 FIGURE B-3 VENT SYSTEM SERVING A SINGLE APPLIANCE WITH A MASONRY CHIMNEY OF TYPE B
FIGURE B-4 VENT SYSTEM SERVING A SINGLE APPLIANCE USING A MASONRY CHIMNEY AND A
FIGURE B-5 ASBESTOS CEMENT TYPE B OR SINGLE-WALL METAL VENT SYSTEM SERVING A SINGLE DRAFT-HOOD-EQUIPPED APPLIANCE
FIGURE B-6 VENT SYSTEM SERVING TWO OR MORE APPLIANCES WITH TYPE B DOUBLE-WALL VENT AND TYPE B DOUBLE-WALL VENT CONNECTOR
398 FIGURE B-7 VENT SYSTEM SERVING TWO OR MORE APPLIANCES WITH TYPE B DOUBLE-WALL VENT AND SINGLE-WALL METAL VENT CONNECTORS
FIGURE B-8 MASONRY CHIMNEY SERVING TWO OR MORE APPLIANCES WITH TYPE B DOUBLE-WALL VENT CONNECTOR
FIGURE B-9 MASONRY CHIMNEY SERVING TWO OR MORE APPLIANCES WITH SINGLE-WALL METAL VENT CONNECTORS
FIGURE B-10 ASBESTOS CEMENT TYPE B OR SINGLE-WALL METAL VENT SYSTEM SERVING TWO OR MORE DRAFT-HOOD-EQUIPPED APPLIANCES
399 FIGURE B-11 USE OF MANIFOLD COMMON VENT CONNECTOR
FIGURE B-12 USE OF OFFSET COMMON VENT
FIGURE B-13 MULTISTORY GAS VENT DESIGN PROCEDURE FOR EACH SEGMENT OF SYSTEM
FIGURE B-14 MULTISTORY VENT SYSTEMS
400 FIGURE B-15 (EXAMPLE 1) SINGLE DRAFT-HOOD-EQUIPPED APPLIANCE
FIGURE B-16 (EXAMPLE 2)
401 EXAMPLES USING COMMON VENTING TABLES
FIGURE B-17 (EXAMPLE 4)
FIGURE B-18 (EXAMPLE 5A) COMMON VENTING A DRAFT HOOD WITH A FAN-ASSISTED
403 TABLE B-1 MASONRY CHIMNEY LINER DIMENSIONS WITH CIRCULAR EQUIVALENTSa
404 FIGURE B-19
406 APPENDIX C (IFGS): EXIT TERMINALS OF MECHANICAL DRAFT AND DIRECT-VENTING SYSTEMS
APPENDIX C EXIT TERMINALS OF MECHANICAL DRAFT AND DIRECT-VENT VENTING SYSTEMS
408 APPENDIX D (IFGS): RECOMMENDED PROCEDURE FOR SAFETY INSPECTION OF AN EXISTING APPLIANCE INSTALLATION
410 INDEX

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ICC IFGC Commentary 2012
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