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ICC IECC 2021 1stptg

ICC IECC 2021 1stptg

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International Energy Conservation Code, 3rd Printing

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ICC 2021
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The 2021 IECC® addresses energy efficiency on several fronts including cost, energy usage, use of natural resources and the impact of energy usage on the environment.

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PDF Pages PDF Title
1 2021 IECC® INTERNATIONAL ENERGY CONSERVATION CODE®
2 2021 IECC® INTERNATIONAL ENERGY CONSERVATION CODE® TITLE PAGE
3 COPYRIGHT
4 PREFACE
10 ARRANGEMENT AND FORMAT OF THE 2021 IECC
14 ABBREVIATIONS AND NOTATIONS
16 TABLE OF CONTENTS
18 IECC—COMMERCIAL PROVISIONS
TABLE OF CONTENTS
20 CHAPTER 1 [CE] SCOPE AND ADMINISTRATION
PART 1—SCOPE AND APPLICATION
SECTION C101 SCOPE AND GENERAL REQUIREMENTS
SECTION C102 ALTERNATIVE MATERIALS, DESIGN AND METHODS OF CONSTRUCTION AND EQUIPMENT
PART 2—ADMINISTRATION AND ENFORCEMENT
SECTION C103 CONSTRUCTION DOCUMENTS
22 SECTION C104 FEES
SECTION C105 INSPECTIONS
23 SECTION C106 NOTICE OF APPROVAL
SECTION C107 VALIDITY
SECTION C108 REFERENCED STANDARDS
SECTION C109 STOP WORK ORDER
SECTION C110 BOARD OF APPEALS
24 CHAPTER 2 [CE] DEFINITIONS
SECTION C201 GENERAL
SECTION C202 GENERAL DEFINITIONS
32 CHAPTER 3 [CE] GENERAL REQUIREMENTS
SECTION C301 CLIMATE ZONES
33 FIGURE C301.1 CLIMATE ZONES
34 TABLE C301.1 CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
35 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
36 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
37 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
38 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
39 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
40 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
41 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
42 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
43 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
44 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
45 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
46 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
47 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
48 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
49 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
50 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
51 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
52 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
53 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
54 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
55 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
56 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
57 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
58 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
59 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
60 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
61 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
62 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
63 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
64 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
65 TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
66 EQUATION 3-1
EQUATION 3-2
EQUATION 3-3
67 TABLE C301.3 THERMAL CLIMATE ZONE DEFINITIONS
SECTION C302 DESIGN CONDITIONS
SECTION C303 MATERIALS, SYSTEMS AND EQUIPMENT
68 TABLE C303.1.3(1) DEFAULT GLAZED WINDOW, GLASS DOOR AND SKYLIGHT U-FACTORS
TABLE C303.1.3(2) DEFAULT OPAQUE DOOR U-FACTORS
TABLE C303.1.3(3) DEFAULT GLAZED FENESTRATION SHGC AND VT
70 CHAPTER 4 [CE] COMMERCIAL ENERGY EFFICIENCY
SECTION C401 GENERAL
SECTION C402 BUILDING ENVELOPE REQUIREMENTS
71 TABLE C402.1.1.1 FENESTRATION THERMAL ENVELOPE MAXIMUM REQUIREMENTS
72 TABLE C402.1.3 OPAQUE THERMAL ENVELOPE INSULATION COMPONENT MINIMUM REQUIREMENTS, R-VALUE METHODa
73 TABLE C402.1.4 OPAQUE THERMAL ENVELOPE ASSEMBLY MAXIMUM REQUIREMENTS, U-FACTOR METHODa
74 EQUATION 4-1
TABLE C402.1.4.2 EFFECTIVE R-VALUES FOR STEEL STUD WALL ASSEMBLIES
EQUATION 4-2
76 TABLE C402.3 MINIMUM ROOF REFLECTANCE AND EMITTANCE OPTIONSa
EQUATION 4-3
77 TABLE C402.4 BUILDING ENVELOPE FENESTRATION MAXIMUM U-FACTOR AND SHGC REQUIREMENTS
EQUATION 4-4
78 EQUATION 4-5
81 TABLE C402.5.4 MAXIMUM AIR LEAKAGE RATE FOR FENESTRATION ASSEMBLIES
83 SECTION C403 BUILDING MECHANICAL SYSTEMS
TABLE C403.1.2(1) MAXIMUM DESIGN MECHANICAL LOAD COMPONENT (DESIGN MLC)
TABLE C403.1.2(2) MAXIMUM ANNUALIZED MECHANICAL LOAD COMPONENT (ANNUALIZED MLC)
84 EQUATION 4-6
EQUATION 4-7
85 TABLE C403.3.2(1) ELECTRICALLY OPERATED UNITARY AIR CONDITIONERS AND CONDENSING UNITS—MINIMUM EFFICIENCY REQUIREMENTSc
86 TABLE C403.3.2(1)—continued ELECTRICALLY OPERATED UNITARY AIR CONDITIONERS AND CONDENSING UNITS—MINIMUM EFFICIENCY REQUIREMENTSc
87 TABLE C403.3.2(1)—continued ELECTRICALLY OPERATED UNITARY AIR CONDITIONERS AND CONDENSING UNITS—MINIMUM EFFICIENCY REQUIREMENTSc
88 TABLE C403.3.2(2) ELECTRICALLY OPERATED AIR-COOLED UNITARY HEAT PUMPS—MINIMUM EFFICIENCY REQUIREMENTSc
89 TABLE C403.3.2(2)—continued ELECTRICALLY OPERATED AIR-COOLED UNITARY HEAT PUMPS—MINIMUM EFFICIENCY REQUIREMENTSc
90 TABLE C403.3.2(3) WATER-CHILLING PACKAGES—MINIMUM EFFICIENCY REQUIREMENTS
91 TABLE C403.3.2(4) ELECTRICALLY OPERATED PACKAGED TERMINAL AIR CONDITIONERS, PACKAGED TERMINAL HEAT PUMPS, SINGLE-PACKAGE VERTICAL AIR CONDITIONERS, SINGLE-PACKAGE VERTICAL HEAT PUMPS, ROOM AIR CONDITIONERS AND ROOM AIR-CONDITIONER HEAT PUMPS—MINIMUM EFFICIENCY REQUIREMENTSe
92 TABLE C403.3.2(4)—continued ELECTRICALLY OPERATED PACKAGED TERMINAL AIR CONDITIONERS, PACKAGED TERMINAL HEAT PUMPS, SINGLE-PACKAGE VERTICAL AIR CONDITIONERS, SINGLE-PACKAGE VERTICAL HEAT PUMPS, ROOM AIR CONDITIONERS AND ROOM AIR-CONDITIONER HEAT PUMPS—MINIMUM EFFICIENCY REQUIREMENTSe
93 TABLE C403.3.2(5) WARM-AIR FURNACES AND COMBINATION WARM-AIR FURNACES/AIR-CONDITIONING UNITS, WARM-AIR DUCT FURNACES AND UNIT HEATERS—MINIMUM EFFICIENCY REQUIREMENTSg
94 TABLE C403.3.2(6) GAS- AND OIL-FIRED BOILERS—MINIMUM EFFICIENCY REQUIREMENTSi
95 TABLE C403.3.2(7) PERFORMANCE REQUIREMENTS FOR HEAT REJECTION EQUIPMENT—MINIMUM EFFICIENCY REQUIREMENTSi
96 TABLE C403.3.2(7)—continued PERFORMANCE REQUIREMENTS FOR HEAT REJECTION EQUIPMENT—MINIMUM EFFICIENCY REQUIREMENTSi
TABLE C403.3.2(8) ELECTRICALLY OPERATED VARIABLE-REFRIGERANT-FLOW AIR CONDITIONERS—MINIMUM EFFICIENCY REQUIREMENTSb
97 TABLE C403.3.2(9) ELECTRICALLY OPERATED VARIABLE-REFRIGERANT-FLOW AND APPLIED HEAT PUMPS—MINIMUM EFFICIENCY REQUIREMENTSb
98 TABLE C403.3.2(9)—continued ELECTRICALLY OPERATED VARIABLE-REFRIGERANT-FLOW AND APPLIED HEAT PUMPS—MINIMUM EFFICIENCY REQUIREMENTSb
99 TABLE C403.3.2(10) FLOOR-MOUNTED AIR CONDITIONERS AND CONDENSING UNITS SERVING COMPUTER ROOMS—MINIMUM EFFICIENCY REQUIREMENTSb
100 TABLE C403.3.2(10)—continued FLOOR-MOUNTED AIR CONDITIONERS AND CONDENSING UNITS SERVING COMPUTER ROOMS—MINIMUM EFFICIENCY REQUIREMENTSb
101 TABLE C403.3.2(11) VAPOR-COMPRESSION-BASED INDOOR POOL DEHUMIDIFIERS—MINIMUM EFFICIENCY REQUIREMENTSb
TABLE C403.3.2(12) ELECTRICALLY OPERATED DX-DOAS UNITS, SINGLE-PACKAGE AND REMOTE CONDENSER, WITHOUT ENERGY RECOVERY—MINIMUM EFFICIENCY REQUIREMENTSb
TABLE C403.3.2(13) ELECTRICALLY OPERATED DX-DOAS UNITS, SINGLE-PACKAGE AND REMOTE CONDENSER, WITH ENERGY RECOVERY—MINIMUM EFFICIENCY REQUIREMENTSb
102 TABLE C403.3.2(14) ELECTRICALLY OPERATED WATER-SOURCE HEAT PUMPS—MINIMUM EFFICIENCY REQUIREMENTSc
103 TABLE C403.3.2(15) HEAT-PUMP AND HEAT RECOVERY CHILLER PACKAGES—MINIMUM EFFICIENCY REQUIREMENTSg
104 TABLE C403.3.2(16) CEILING-MOUNTED COMPUTER-ROOM AIR CONDITIONERS—MINIMUM EFFICIENCY REQUIREMENTSb
105 TABLE C403.3.2(16)—continued CEILING-MOUNTED COMPUTER-ROOM AIR CONDITIONERS—MINIMUM EFFICIENCY REQUIREMENTSb
TABLE C403.3.3 MAXIMUM HOT GAS BYPASS CAPACITY
TABLE C403.3.4 BOILER TURNDOWN
108 TABLE C403.4.4 VARIABLE SPEED DRIVE (VSD) REQUIREMENTS FOR DEMAND-CONTROLLED PUMPS
TABLE C403.5(1) MINIMUM CHILLED-WATER SYSTEM COOLING CAPACITY FOR DETERMINING ECONOMIZER COOLING REQUIREMENTS
109 TABLE C403.5(2) EQUIPMENT EFFICIENCY PERFORMANCE EXCEPTION FOR ECONOMIZERS
TABLE C403.5.1 DX COOLING STAGE REQUIREMENTS FOR MODULATING AIRFLOW UNITS
110 TABLE C403.5.3.3 HIGH-LIMIT SHUTOFF CONTROL SETTING FOR AIR ECONOMIZERSb
114 TABLE C403.7.4.2(1) ENERGY RECOVERY REQUIREMENT (Ventilation systems operating less than 8,000 hours per year)
TABLE C403.7.4.2(2) ENERGY RECOVERY REQUIREMENT (Ventilation systems operating not less than 8,000 hours per year)
TABLE C403.7.5 MAXIMUM NET EXHAUST FLOW RATE, CFM PER LINEAR FOOT OF HOOD LENGTH
116 TABLE C403.8.1(1) FAN POWER LIMITATION
TABLE C403.8.1(2) FAN POWER LIMITATION PRESSURE DROP ADJUSTMENT
117 TABLE C403.8.5 LOW-CAPACITY VENTILATION FAN EFFICACYa
118 TABLE C403.8.6.1 COOLING SYSTEMS
119 TABLE C403.11.2.1(1) WALK-IN COOLER AND FREEZER DISPLAY DOOR EFFICIENCY REQUIREMENTSa
TABLE C403.11.2.1(2) WALK-IN COOLER AND FREEZER NONDISPLAY DOOR EFFICIENCY REQUIREMENTSa
TABLE C403.11.2.1(3) WALK-IN COOLER AND FREEZER REFRIGERATION SYSTEM EFFICIENCY REQUIREMENTS
120 TABLE C403.11.1 MINIMUM EFFICIENCY REQUIREMENTS: COMMERCIAL REFRIGERATORS AND FREEZERS AND REFRIGERATION
121 TABLE C403.11.1—continued MINIMUM EFFICIENCY REQUIREMENTS: COMMERCIAL REFRIGERATORS AND FREEZERS AND REFRIGERATION
123 EQUATION 4-8
124 TABLE C403.12.3 MINIMUM PIPE INSULATION THICKNESS (in inches)a
SECTION C404 SERVICE WATER HEATING
125 TABLE C404.2 MINIMUM PERFORMANCE OF WATER-HEATING EQUIPMENT
126 TABLE C404.2—continued MINIMUM PERFORMANCE OF WATER-HEATING EQUIPMENT
127 TABLE C404.5.1 PIPING VOLUME AND MAXIMUM PIPING LENGTHS
TABLE C404.5.2.1 INTERNAL VOLUME OF VARIOUS WATER DISTRIBUTION TUBING
128 SECTION C405 ELECTRICAL POWER AND LIGHTING SYSTEMS
130 EQUATION 4-9
132 FIGURE C405.2.4.2(1) PRIMARY AND SECONDARY SIDELIT DAYLIGHT ZONES
FIGURE C405.2.4.2(2) DAYLIGHT ZONE UNDER A ROOFTOP MONITOR
FIGURE C405.2.4.2(3) DAYLIGHT ZONE UNDER A SLOPED ROOFTOP MONITOR
133 FIGURE C405.2.4.3 TOPLIT DAYLIGHT ZONE
C405.2.4.4 DAYLIGHT ZONES AT A MULTISTORY ATRIUM
135 EQUATION 4-10
136 TABLE C405.3.2(1) INTERIOR LIGHTING POWER ALLOWANCES: BUILDING AREA METHOD
TABLE C405.3.2(1)—continued INTERIOR LIGHTING POWER ALLOWANCES: BUILDING AREA METHOD
TABLE C405.3.2(2) INTERIOR LIGHTING POWER ALLOWANCES: SPACE-BY-SPACE METHOD
137 TABLE C405.3.2(2)—continued INTERIOR LIGHTING POWER ALLOWANCES: SPACE-BY-SPACE METHOD
TABLE C405.3.2(2)—continued INTERIOR LIGHTING POWER ALLOWANCES: SPACE-BY-SPACE METHOD
138 TABLE C405.3.2(2)—continued INTERIOR LIGHTING POWER ALLOWANCES: SPACE-BY-SPACE METHOD
139 EQUATION 4-11
TABLE C405.5.2(1) EXTERIOR LIGHTING ZONES
140 TABLE C405.5.2(2) LIGHTING POWER ALLOWANCES FOR BUILDING EXTERIORS
TABLE C405.5.2(3) INDIVIDUAL LIGHTING POWER ALLOWANCES FOR BUILDING EXTERIORS
141 TABLE C405.7 MINIMUM NOMINAL EFFICIENCY LEVELS FOR DOE 10 CFR 431 LOW-VOLTAGE DRY-TYPE DISTRIBUTION TRANSFORMERS
142 TABLE C405.8(1) MINIMUM NOMINAL FULL-LOAD EFFICIENCY FOR NEMA DESIGN A, NEMA DESIGN B, AND IEC DESIGN N MOTORS (EXCLUDING FIRE PUMP) ELECTRIC MOTORS AT 60 HZa, b
143 TABLE C405.8(2) MINIMUM NOMINAL FULL-LOAD EFFICIENCY FOR NEMA DESIGN C AND IEC DESIGN H MOTORS AT 60 HZa, b
TABLE C405.8(3) MINIMUM AVERAGE FULL-LOAD EFFICIENCY POLYPHASE SMALL ELECTRIC MOTORSa
144 TABLE C405.8(4) MINIMUM AVERAGE FULL-LOAD EFFICIENCY FOR CAPACITOR-START CAPACITOR-RUN AND CAPACITOR-START INDUCTION-RUN SMALL ELECTRIC MOTORSa
145 TABLE C405.12.2 ENERGY USE CATEGORIES
SECTION C406 ADDITIONAL EFFICIENCY REQUIREMENTS
146 EQUATION 4-12
TABLE C406.1(1) ADDITIONAL ENERGY EFFICIENCY CREDITS FOR GROUP B OCCUPANCIES
147 EQUATION 4-13
TABLE C406.1(2) ADDITIONAL ENERGY EFFICIENCY CREDITS FOR GROUP R AND I OCCUPANCIES
148 TABLE C406.1(3) ADDITIONAL ENERGY EFFICIENCY CREDITS FOR GROUP E OCCUPANCIES
149 EQUATION 4-14
TABLE C406.1(4) ADDITIONAL ENERGY EFFICIENCY CREDITS FOR GROUP M OCCUPANCIES
150 TABLE C406.1(5) ADDITIONAL ENERGY EFFICIENCY CREDITS FOR OTHERa OCCUPANCIES
151 TABLE C406.10.2 ENERGY USE CATEGORIES
152 EQUATION 4-15
TABLE C406.12(1) MINIMUM EFFICIENCY REQUIREMENTS: COMMERCIAL FRYERS
TABLE C406.12(2) MINIMUM EFFICIENCY REQUIREMENTS: COMMERCIAL STEAM COOKERS
153 TABLE C406.12(3) MINIMUM EFFICIENCY REQUIREMENTS: COMMERCIAL DISHWASHERS
TABLE C406.12(4) MINIMUM EFFICIENCY REQUIREMENTS: COMMERCIAL OVENS
SECTION C407 TOTAL BUILDING PERFORMANCE
154 TABLE C407.2 REQUIREMENTS FOR TOTAL BUILDING PERFORMANCE
155 TABLE C407.4.1(1) SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
156 TABLE C407.4.1(1)—continued SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
157 TABLE C407.4.1(1)—continued SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
158 TABLE C407.4.1(2) HVAC SYSTEMS MAP
159 TABLE C407.4.1(3) SPECIFICATIONS FOR THE STANDARD REFERENCE DESIGN HVAC SYSTEM DESCRIPTIONS
160 TABLE C407.4.1(3)—continued SPECIFICATIONS FOR THE STANDARD REFERENCE DESIGN HVAC SYSTEM DESCRIPTIONS
TABLE C407.4.1(4) NUMBER OF CHILLERS
TABLE C407.4.1(5) WATER CHILLER TYPES
SECTION C408 MAINTENANCE INFORMATION AND SYSTEM COMMISSIONING
162 FIGURE C408.2.4 COMMISSIONING COMPLIANCE CHECKLIST
166 CHAPTER 5 [CE] EXISTING BUILDINGS
SECTION C501 GENERAL
SECTION C502 ADDITIONS
167 SECTION C503 ALTERATIONS
168 SECTION C504 REPAIRS
SECTION C505 CHANGE OF OCCUPANCY OR USE
170 CHAPTER 6 [CE] REFERENCED STANDARDS
AAMA
AHAM
AHRI
171 AMCA
ANSI
APSP
ASABE
172 ASHRAE
ASME
ASTM
173 CRRC
CSA
174 CTI
DASMA
DOE
ICC
175 IEEE
IES
ISO
NEMA
NFPA
NFRC
SMACNA
176 UL
US-FTC
WDMA
178 APPENDIX CA BOARD OF APPEALS—COMMERCIAL
SECTION CA101 GENERAL
180 APPENDIX CB SOLAR-READY ZONE—COMMERCIAL
SECTION CB101 SCOPE
SECTION CB102 GENERAL DEFINITION
SECTION CB103 SOLAR-READY ZONE
182 APPENDIX CC ZERO ENERGY COMMERCIAL BUILDING PROVISIONS
SECTION CC101 GENERAL
SECTION CC102 DEFINITIONS
SECTION CC103 MINIMUM RENEWABLE ENERGY
EQUATION CC-1
183 TABLE CC103.1 ENERGY UTILIZATION INTENSITY FOR BUILDING TYPES AND CLIMATES (kBtu/ft² – yr)
EQUATION CC-2
184 TABLE CC103.3.3 DEFAULT OFF-SITE RENEWABLE ENERGY PROCUREMENT METHODS, CLASSES AND COEFFICIENTS
186 INDEX
196 IECC—RESIDENTIAL PROVISIONS
TABLE OF CONTENTS
198 CHAPTER 1 [RE] SCOPE AND ADMINISTRATION
PART 1—SCOPE AND APPLICATION
SECTION R101 SCOPE AND GENERAL REQUIREMENTS
SECTION R102 ALTERNATIVE MATERIALS, DESIGN AND METHODS OF CONSTRUCTION AND EQUIPMENT
PART 2—ADMINISTRATION AND ENFORCEMENT
SECTION R103 CONSTRUCTION DOCUMENTS
199 SECTION R104 FEES
200 SECTION R105 INSPECTIONS
SECTION R106 NOTICE OF APPROVAL
SECTION R107 VALIDITY
SECTION R108 REFERENCED STANDARDS
201 SECTION R109 STOP WORK ORDER
SECTION R110 MEANS OF APPEALS
202 CHAPTER 2 [RE] DEFINITIONS
SECTION R201 GENERAL
SECTION R202 GENERAL DEFINITIONS
206 CHAPTER 3 [RE] GENERAL REQUIREMENTS
SECTION R301 CLIMATE ZONES
207 FIGURE R301.1 CLIMATE ZONES
208 TABLE R301.1 CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
209 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
210 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
211 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
212 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
213 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
214 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
215 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
216 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
217 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
218 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
219 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
220 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
221 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
222 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
223 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
224 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
225 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
226 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
227 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
228 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
229 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
230 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
231 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
232 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
233 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
234 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
235 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
236 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
237 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
238 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
239 TABLE R301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORYa
240 EQUATION 3-1
EQUATION 3-2
EQUATION 3-3
241 TABLE R301.3 THERMAL CLIMATE ZONE DEFINITIONS
SECTION R302 DESIGN CONDITIONS
SECTION R303 MATERIALS, SYSTEMS AND EQUIPMENT
242 TABLE R303.1.3(1) DEFAULT GLAZED WINDOW, GLASS DOOR AND SKYLIGHT U-FACTORS
TABLE R303.1.3(2) DEFAULT OPAQUE DOOR U-FACTORS
TABLE R303.1.3(3) DEFAULT GLAZED FENESTRATION SHGC AND VT
244 CHAPTER 4 [RE] RESIDENTIAL ENERGY EFFICIENCY
SECTION R401 GENERAL
245 SECTION R402 BUILDING THERMAL ENVELOPE
TABLE R402.1.2 MAXIMUM ASSEMBLY U-FACTORSa AND FENESTRATION REQUIREMENTS
246 TABLE R402.1.3 INSULATION MINIMUM R-VALUES AND FENESTRATION REQUIREMENTS BY COMPONENTa
248 TABLE R402.2.6 STEEL-FRAME CEILING, WALL AND FLOOR INSULATION R-VALUES
250 TABLE R402.4.1.1 AIR BARRIER, AIR SEALING AND INSULATION INSTALLATIONa
251 TABLE R402.4.1.1—continued AIR BARRIER, AIR SEALING AND INSULATION INSTALLATIONa
252 SECTION R403 SYSTEMS
255 TABLE R403.6.2 WHOLE-DWELLING MECHANICAL VENTILATION SYSTEM FAN EFFICACYa
256 SECTION R404 ELECTRICAL POWER AND LIGHTING SYSTEMS
SECTION R405 TOTAL BUILDING PERFORMANCE
257 TABLE R405.2 REQUIREMENTS FOR TOTAL BUILDING PERFORMANCE
258 TABLE R405.4.2(1) SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
259 TABLE R405.4.2(1)—continued SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
260 TABLE R405.4.2(1)—continued SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
261 TABLE R405.4.2(1)—continued SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS
TABLE R405.4.2(2) DEFAULT DISTRIBUTION SYSTEM EFFICIENCIES FOR PROPOSED DESIGNSa
262 SECTION R406 ENERGY RATING INDEX COMPLIANCE ALTERNATIVE
TABLE R406.2 REQUIREMENTS FOR ENERGY RATING INDEX
EQUATION 4-1
EQUATION 4-2
TABLE R406.5 MAXIMUM ENERGY RATING INDEX
264 SECTION R407 TROPICAL CLIMATE REGION COMPLIANCE PATH
SECTION R408 ADDITIONAL EFFICIENCY PACKAGE OPTIONS
266 CHAPTER 5 [RE] EXISTING BUILDINGS
SECTION R501 GENERAL
SECTION R502 ADDITIONS
267 SECTION R503 ALTERATIONS
SECTION R504 REPAIRS
268 SECTION R505 CHANGE OF OCCUPANCY OR USE
270 CHAPTER 6 [RE] REFERENCED STANDARDS
AAMA
ACCA
APSP
ASHRAE
271 ASTM
CSA
DASMA
HVI
ICC
272 IEEE
NFPA
273 NFRC
RESNET
UL
US-FTC
WDMA
274 APPENDIX RA BOARD OF APPEALS—RESIDENTIAL
SECTION RA101 GENERAL
276 APPENDIX RB SOLAR-READY PROVISIONS—DETACHED ONE- AND TWO-FAMILY DWELLINGS AND TOWNHOUSES
SECTION RB101 SCOPE
SECTION RB102 GENERAL DEFINITION
SECTION RB103 SOLAR-READY ZONE
278 APPENDIX RC ZERO ENERGY RESIDENTIAL BUILDING PROVISIONS
SECTION RC101 COMPLIANCE
SECTION RC 102 ZERO ENERGY RESIDENTIAL BUILDINGS
EQUATION RC-1
TABLE RC102.2 MAXIMUM ENERGY RATING INDEXa
280 INDEX
286 VALUABLE GUIDES TO CHANGES IN THE 2021 I-CODES®
287 ICC EVALUATION SERVICE
288 PROCTORED REMOTE ONLINE TESTING OPTION (PRONTO™)
289 ICC DIGITAL CODES PREMIUM

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