2012 INTERNATIONAL ENERGY CONSERVATION CODE® C-11

CHAPTER 3 [CE]

GENERAL REQUIREMENTS

SECTION C301 CLIMATE ZONES

C301.1 General. Climate zones from Figure C301.1 or TableC301.1 shall be used in determining the applicable require-ments from Chapter 4. Locations not in Table C301.1 (out-side the United States) shall be assigned a climate zone basedon Section C301.3.

C301.2 Warm humid counties. Warm humid counties areidentified in Table C301.1 by an asterisk.

C301.3 International climate zones. The climate zone forany location outside the United States shall be determined byapplying Table C301.3(1) and then Table C301.3(2).

GENERAL REQUIREMENTS

C-12 2012 INTERNATIONAL ENERGY CONSERVATION CODE®

FIG

UR

E C

301.

1 C

LIM

AT

E Z

ON

ES

GENERAL REQUIREMENTS

2012 INTERNATIONAL ENERGY CONSERVATION CODE® C-13

TABLE C301.1 CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE, COUNTY AND TERRITORY

Key: A – Moist, B – Dry, C – Marine. Absence of moisture designation indicates moisture regime is irrelevant.Asterisk (*) indicates a warm-humid location.

(continued)

US STATES

ALABAMA

3A Autauga*2A Baldwin*3A Barbour*3A Bibb3A Blount3A Bullock*3A Butler*3A Calhoun3A Chambers3A Cherokee3A Chilton3A Choctaw*3A Clarke*3A Clay3A Cleburne3A Coffee*3A Colbert3A Conecuh*3A Coosa3A Covington*3A Crenshaw*3A Cullman3A Dale*3A Dallas*3A DeKalb3A Elmore*3A Escambia*3A Etowah3A Fayette3A Franklin3A Geneva*3A Greene3A Hale3A Henry*3A Houston*3A Jackson3A Jefferson3A Lamar3A Lauderdale3A Lawrence

3A Lee3A Limestone3A Lowndes*3A Macon*3A Madison3A Marengo*3A Marion3A Marshall2A Mobile*3A Monroe*3A Montgomery*3A Morgan3A Perry*3A Pickens3A Pike*3A Randolph3A Russell*3A Shelby3A St. Clair3A Sumter3A Talladega3A Tallapoosa3A Tuscaloosa3A Walker3A Washington*3A Wilcox*3A Winston

ALASKA

7 Aleutians East7 Aleutians West7 Anchorage8 Bethel7 Bristol Bay7 Denali8 Dillingham8 Fairbanks North Star7 Haines7 Juneau7 Kenai Peninsula7 Ketchikan Gateway

7 Kodiak Island7 Lake and Peninsula7 Matanuska-Susitna8 Nome8 North Slope8 Northwest Arctic7 Prince of Wales

Outer Ketchikan7 Sitka7 Skagway-Hoonah-

Angoon8 Southeast Fairbanks7 Valdez-Cordova8 Wade Hampton7 Wrangell-Petersburg7 Yakutat8 Yukon-Koyukuk

ARIZONA

5B Apache3B Cochise5B Coconino4B Gila3B Graham3B Greenlee2B La Paz2B Maricopa3B Mohave5B Navajo2B Pima2B Pinal3B Santa Cruz4B Yavapai2B Yuma

ARKANSAS

3A Arkansas3A Ashley4A Baxter4A Benton4A Boone3A Bradley

3A Calhoun4A Carroll3A Chicot3A Clark3A Clay3A Cleburne3A Cleveland3A Columbia*3A Conway3A Craighead3A Crawford3A Crittenden3A Cross3A Dallas3A Desha3A Drew3A Faulkner3A Franklin4A Fulton3A Garland3A Grant3A Greene3A Hempstead*3A Hot Spring3A Howard3A Independence4A Izard3A Jackson3A Jefferson3A Johnson3A Lafayette*3A Lawrence3A Lee3A Lincoln3A Little River*3A Logan3A Lonoke4A Madison4A Marion3A Miller*3A Mississippi

3A Monroe3A Montgomery3A Nevada4A Newton3A Ouachita3A Perry3A Phillips3A Pike3A Poinsett3A Polk3A Pope3A Prairie3A Pulaski3A Randolph3A Saline3A Scott4A Searcy3A Sebastian3A Sevier*3A Sharp3A St. Francis4A Stone3A Union*3A Van Buren4A Washington3A White3A Woodruff3A Yell

CALIFORNIA

3C Alameda6B Alpine4B Amador3B Butte4B Calaveras3B Colusa3B Contra Costa4C Del Norte4B El Dorado3B Fresno3B Glenn

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C-14 2012 INTERNATIONAL ENERGY CONSERVATION CODE®

TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE, COUNTY AND TERRITORY

4C Humboldt2B Imperial4B Inyo3B Kern3B Kings4B Lake5B Lassen3B Los Angeles3B Madera3C Marin4B Mariposa3C Mendocino3B Merced5B Modoc6B Mono3C Monterey3C Napa5B Nevada3B Orange3B Placer5B Plumas3B Riverside3B Sacramento3C San Benito3B San Bernardino3B San Diego3C San Francisco3B San Joaquin3C San Luis Obispo3C San Mateo3C Santa Barbara3C Santa Clara3C Santa Cruz3B Shasta5B Sierra5B Siskiyou3B Solano3C Sonoma3B Stanislaus3B Sutter3B Tehama4B Trinity3B Tulare4B Tuolumne3C Ventura3B Yolo

3B Yuba

COLORADO

5B Adams6B Alamosa5B Arapahoe6B Archuleta4B Baca5B Bent5B Boulder6B Chaffee5B Cheyenne7 Clear Creek6B Conejos6B Costilla5B Crowley6B Custer5B Delta5B Denver6B Dolores5B Douglas6B Eagle5B Elbert5B El Paso5B Fremont5B Garfield5B Gilpin7 Grand7 Gunnison7 Hinsdale5B Huerfano7 Jackson5B Jefferson5B Kiowa5B Kit Carson7 Lake5B La Plata5B Larimer4B Las Animas5B Lincoln5B Logan5B Mesa7 Mineral6B Moffat5B Montezuma5B Montrose

5B Morgan4B Otero6B Ouray7 Park5B Phillips7 Pitkin5B Prowers5B Pueblo6B Rio Blanco7 Rio Grande7 Routt6B Saguache7 San Juan6B San Miguel5B Sedgwick7 Summit5B Teller5B Washington5B Weld5B Yuma

CONNECTICUT

5A (all)

DELAWARE

4A (all)

DISTRICT OF COLUMBIA

4A (all)

FLORIDA

2A Alachua*2A Baker*2A Bay*2A Bradford*2A Brevard*1A Broward*2A Calhoun*2A Charlotte*2A Citrus*2A Clay*2A Collier*2A Columbia*2A DeSoto*2A Dixie*2A Duval*

2A Escambia*2A Flagler*2A Franklin*2A Gadsden*2A Gilchrist*2A Glades*2A Gulf*2A Hamilton*2A Hardee*2A Hendry*2A Hernando*2A Highlands*2A Hillsborough*2A Holmes*2A Indian River*2A Jackson*2A Jefferson*2A Lafayette*2A Lake*2A Lee*2A Leon*2A Levy*2A Liberty*2A Madison*2A Manatee*2A Marion*2A Martin*1A Miami-Dade*1A Monroe*2A Nassau*2A Okaloosa*2A Okeechobee*2A Orange*2A Osceola*2A Palm Beach*2A Pasco*2A Pinellas*2A Polk*2A Putnam*2A Santa Rosa*2A Sarasota*2A Seminole*2A St. Johns*2A St. Lucie*2A Sumter*2A Suwannee*

2A Taylor*2A Union*2A Volusia*2A Wakulla*2A Walton*2A Washington*

GEORGIA

2A Appling*2A Atkinson*2A Bacon*2A Baker*3A Baldwin4A Banks3A Barrow3A Bartow3A Ben Hill*2A Berrien*3A Bibb3A Bleckley*2A Brantley*2A Brooks*2A Bryan*3A Bulloch*3A Burke3A Butts3A Calhoun*2A Camden*3A Candler*3A Carroll4A Catoosa2A Charlton*2A Chatham*3A Chattahoochee*4A Chattooga3A Cherokee3A Clarke3A Clay*3A Clayton2A Clinch*3A Cobb3A Coffee*2A Colquitt*3A Columbia2A Cook*3A Coweta

(continued)

GENERAL REQUIREMENTS

2012 INTERNATIONAL ENERGY CONSERVATION CODE® C-15

3A Crawford3A Crisp*4A Dade4A Dawson2A Decatur*3A DeKalb3A Dodge*3A Dooly*3A Dougherty*3A Douglas3A Early*2A Echols*2A Effingham*3A Elbert3A Emanuel*2A Evans*4A Fannin3A Fayette4A Floyd3A Forsyth4A Franklin3A Fulton4A Gilmer3A Glascock2A Glynn*4A Gordon2A Grady*3A Greene3A Gwinnett4A Habersham4A Hall3A Hancock3A Haralson3A Harris3A Hart3A Heard3A Henry3A Houston*3A Irwin*3A Jackson3A Jasper2A Jeff Davis*3A Jefferson3A Jenkins*3A Johnson*3A Jones3A Lamar

2A Lanier*3A Laurens*3A Lee*2A Liberty*3A Lincoln2A Long*2A Lowndes*4A Lumpkin3A Macon*3A Madison3A Marion*3A McDuffie2A McIntosh*3A Meriwether2A Miller*2A Mitchell*3A Monroe3A Montgomery*3A Morgan4A Murray3A Muscogee3A Newton3A Oconee3A Oglethorpe3A Paulding3A Peach*4A Pickens2A Pierce*3A Pike3A Polk3A Pulaski*3A Putnam3A Quitman*4A Rabun3A Randolph*3A Richmond3A Rockdale3A Schley*3A Screven*2A Seminole*3A Spalding4A Stephens3A Stewart*3A Sumter*3A Talbot3A Taliaferro2A Tattnall*

3A Taylor*3A Telfair*3A Terrell*2A Thomas*3A Tift*2A Toombs*4A Towns3A Treutlen*3A Troup3A Turner*3A Twiggs*4A Union3A Upson4A Walker3A Walton2A Ware*3A Warren3A Washington2A Wayne*3A Webster*3A Wheeler*4A White4A Whitfield3A Wilcox*3A Wilkes3A Wilkinson3A Worth*

HAWAII

1A (all)*

IDAHO

5B Ada6B Adams6B Bannock6B Bear Lake5B Benewah6B Bingham6B Blaine6B Boise6B Bonner6B Bonneville6B Boundary6B Butte6B Camas5B Canyon6B Caribou

5B Cassia6B Clark5B Clearwater6B Custer5B Elmore6B Franklin6B Fremont5B Gem5B Gooding5B Idaho6B Jefferson5B Jerome5B Kootenai5B Latah6B Lemhi5B Lewis5B Lincoln6B Madison5B Minidoka5B Nez Perce6B Oneida5B Owyhee5B Payette5B Power5B Shoshone6B Teton5B Twin Falls6B Valley5B Washington

ILLINOIS

5A Adams4A Alexander4A Bond5A Boone5A Brown5A Bureau5A Calhoun5A Carroll5A Cass5A Champaign4A Christian5A Clark4A Clay4A Clinton5A Coles5A Cook

4A Crawford5A Cumberland5A DeKalb5A De Witt5A Douglas5A DuPage5A Edgar4A Edwards4A Effingham4A Fayette5A Ford4A Franklin5A Fulton4A Gallatin5A Greene5A Grundy4A Hamilton5A Hancock4A Hardin5A Henderson5A Henry5A Iroquois4A Jackson4A Jasper4A Jefferson5A Jersey5A Jo Daviess4A Johnson5A Kane5A Kankakee5A Kendall5A Knox5A Lake5A La Salle4A Lawrence5A Lee5A Livingston5A Logan5A Macon4A Macoupin4A Madison4A Marion5A Marshall5A Mason4A Massac5A McDonough5A McHenry

TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE, COUNTY AND TERRITORY

(continued)

GENERAL REQUIREMENTS

C-16 2012 INTERNATIONAL ENERGY CONSERVATION CODE®

TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE, COUNTY AND TERRITORY

5A McLean5A Menard5A Mercer4A Monroe4A Montgomery5A Morgan5A Moultrie5A Ogle5A Peoria4A Perry5A Piatt5A Pike4A Pope4A Pulaski5A Putnam4A Randolph4A Richland5A Rock Island4A Saline5A Sangamon5A Schuyler5A Scott4A Shelby5A Stark4A St. Clair5A Stephenson5A Tazewell4A Union5A Vermilion4A Wabash5A Warren4A Washington4A Wayne4A White5A Whiteside5A Will4A Williamson5A Winnebago5A Woodford

INDIANA

5A Adams5A Allen5A Bartholomew5A Benton5A Blackford

5A Boone4A Brown5A Carroll5A Cass4A Clark5A Clay5A Clinton4A Crawford4A Daviess4A Dearborn5A Decatur5A De Kalb5A Delaware4A Dubois5A Elkhart5A Fayette4A Floyd5A Fountain5A Franklin5A Fulton4A Gibson5A Grant4A Greene5A Hamilton5A Hancock4A Harrison5A Hendricks5A Henry5A Howard5A Huntington4A Jackson5A Jasper5A Jay4A Jefferson4A Jennings5A Johnson4A Knox5A Kosciusko5A Lagrange5A Lake5A La Porte4A Lawrence5A Madison5A Marion5A Marshall4A Martin

5A Miami4A Monroe5A Montgomery5A Morgan5A Newton5A Noble4A Ohio4A Orange5A Owen5A Parke4A Perry4A Pike5A Porter4A Posey5A Pulaski5A Putnam5A Randolph4A Ripley5A Rush4A Scott5A Shelby4A Spencer5A Starke5A Steuben5A St. Joseph4A Sullivan4A Switzerland5A Tippecanoe5A Tipton5A Union4A Vanderburgh5A Vermillion5A Vigo5A Wabash5A Warren4A Warrick4A Washington5A Wayne5A Wells5A White5A Whitley

IOWA

5A Adair5A Adams6A Allamakee

5A Appanoose5A Audubon5A Benton6A Black Hawk5A Boone6A Bremer6A Buchanan6A Buena Vista6A Butler6A Calhoun5A Carroll5A Cass5A Cedar6A Cerro Gordo6A Cherokee6A Chickasaw5A Clarke6A Clay6A Clayton5A Clinton5A Crawford5A Dallas5A Davis5A Decatur6A Delaware5A Des Moines6A Dickinson5A Dubuque6A Emmet6A Fayette6A Floyd6A Franklin5A Fremont5A Greene6A Grundy5A Guthrie6A Hamilton6A Hancock6A Hardin5A Harrison5A Henry6A Howard6A Humboldt6A Ida5A Iowa5A Jackson

5A Jasper5A Jefferson5A Johnson5A Jones5A Keokuk6A Kossuth5A Lee5A Linn5A Louisa5A Lucas6A Lyon5A Madison5A Mahaska5A Marion5A Marshall5A Mills6A Mitchell5A Monona5A Monroe5A Montgomery5A Muscatine6A O’Brien6A Osceola5A Page6A Palo Alto6A Plymouth6A Pocahontas5A Polk5A Pottawattamie5A Poweshiek5A Ringgold6A Sac5A Scott5A Shelby6A Sioux5A Story5A Tama5A Taylor5A Union5A Van Buren5A Wapello5A Warren5A Washington5A Wayne6A Webster6A Winnebago

(continued)

GENERAL REQUIREMENTS

2012 INTERNATIONAL ENERGY CONSERVATION CODE® C-17

TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE, COUNTY AND TERRITORY

(continued)

6A Winneshiek5A Woodbury6A Worth6A Wright

KANSAS

4A Allen4A Anderson4A Atchison4A Barber4A Barton4A Bourbon4A Brown4A Butler4A Chase4A Chautauqua4A Cherokee5A Cheyenne4A Clark4A Clay5A Cloud4A Coffey4A Comanche4A Cowley4A Crawford5A Decatur4A Dickinson4A Doniphan4A Douglas4A Edwards4A Elk5A Ellis4A Ellsworth4A Finney4A Ford4A Franklin4A Geary5A Gove5A Graham4A Grant4A Gray5A Greeley4A Greenwood5A Hamilton4A Harper4A Harvey

4A Haskell4A Hodgeman4A Jackson4A Jefferson5A Jewell4A Johnson4A Kearny4A Kingman4A Kiowa4A Labette5A Lane4A Leavenworth4A Lincoln4A Linn5A Logan4A Lyon4A Marion4A Marshall4A McPherson4A Meade4A Miami5A Mitchell4A Montgomery4A Morris4A Morton4A Nemaha4A Neosho5A Ness5A Norton4A Osage5A Osborne4A Ottawa4A Pawnee5A Phillips4A Pottawatomie4A Pratt5A Rawlins4A Reno5A Republic4A Rice4A Riley5A Rooks4A Rush4A Russell4A Saline5A Scott

4A Sedgwick4A Seward4A Shawnee5A Sheridan5A Sherman5A Smith4A Stafford4A Stanton4A Stevens4A Sumner5A Thomas5A Trego4A Wabaunsee5A Wallace4A Washington5A Wichita4A Wilson4A Woodson4A Wyandotte

KENTUCKY

4A (all)

LOUISIANA

2A Acadia*2A Allen*2A Ascension*2A Assumption*2A Avoyelles*2A Beauregard*3A Bienville*3A Bossier*3A Caddo*2A Calcasieu*3A Caldwell*2A Cameron*3A Catahoula*3A Claiborne*3A Concordia*3A De Soto*2A East Baton Rouge*3A East Carroll2A East Feliciana*2A Evangeline*3A Franklin*3A Grant*2A Iberia*

2A Iberville*3A Jackson*2A Jefferson*2A Jefferson Davis*2A Lafayette*2A Lafourche*3A La Salle*3A Lincoln*2A Livingston*3A Madison*3A Morehouse3A Natchitoches*2A Orleans*3A Ouachita*2A Plaquemines*2A Pointe Coupee*2A Rapides*3A Red River*3A Richland*3A Sabine*2A St. Bernard*2A St. Charles*2A St. Helena*2A St. James*2A St. John the

Baptist*2A St. Landry*2A St. Martin*2A St. Mary*2A St. Tammany*2A Tangipahoa*3A Tensas*2A Terrebonne*3A Union*2A Vermilion*3A Vernon*2A Washington*3A Webster*2A West Baton

Rouge*3A West Carroll2A West Feliciana*3A Winn*

MAINE

6A Androscoggin7 Aroostook

6A Cumberland6A Franklin6A Hancock6A Kennebec6A Knox6A Lincoln6A Oxford6A Penobscot6A Piscataquis6A Sagadahoc6A Somerset6A Waldo6A Washington6A York

MARYLAND

4A Allegany4A Anne Arundel4A Baltimore4A Baltimore (city)4A Calvert4A Caroline4A Carroll4A Cecil4A Charles4A Dorchester4A Frederick5A Garrett4A Harford4A Howard4A Kent4A Montgomery4A Prince George’s4A Queen Anne’s4A Somerset4A St. Mary’s4A Talbot4A Washington4A Wicomico4A Worcester

MASSACHSETTS

5A (all)

MICHIGAN

6A Alcona6A Alger

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TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE, COUNTY AND TERRITORY

(continued)

5A Allegan6A Alpena6A Antrim6A Arenac7 Baraga5A Barry5A Bay6A Benzie5A Berrien5A Branch5A Calhoun5A Cass6A Charlevoix6A Cheboygan7 Chippewa6A Clare5A Clinton6A Crawford6A Delta6A Dickinson5A Eaton6A Emmet5A Genesee6A Gladwin7 Gogebic6A Grand Traverse5A Gratiot5A Hillsdale7 Houghton6A Huron5A Ingham5A Ionia6A Iosco7 Iron6A Isabella5A Jackson5A Kalamazoo6A Kalkaska5A Kent7 Keweenaw6A Lake5A Lapeer6A Leelanau5A Lenawee5A Livingston7 Luce

7 Mackinac5A Macomb6A Manistee6A Marquette6A Mason6A Mecosta6A Menominee5A Midland6A Missaukee5A Monroe5A Montcalm6A Montmorency5A Muskegon6A Newaygo5A Oakland6A Oceana6A Ogemaw7 Ontonagon6A Osceola6A Oscoda6A Otsego5A Ottawa6A Presque Isle6A Roscommon5A Saginaw6A Sanilac7 Schoolcraft5A Shiawassee5A St. Clair5A St. Joseph5A Tuscola5A Van Buren5A Washtenaw5A Wayne6A Wexford

MINNESOTA

7 Aitkin6A Anoka7 Becker7 Beltrami6A Benton6A Big Stone6A Blue Earth6A Brown7 Carlton

6A Carver7 Cass6A Chippewa6A Chisago7 Clay7 Clearwater7 Cook6A Cottonwood7 Crow Wing6A Dakota6A Dodge6A Douglas6A Faribault6A Fillmore6A Freeborn6A Goodhue7 Grant6A Hennepin6A Houston7 Hubbard6A Isanti7 Itasca6A Jackson7 Kanabec6A Kandiyohi7 Kittson7 Koochiching6A Lac qui Parle7 Lake7 Lake of the Woods6A Le Sueur6A Lincoln6A Lyon7 Mahnomen7 Marshall6A Martin6A McLeod6A Meeker7 Mille Lacs6A Morrison6A Mower6A Murray6A Nicollet6A Nobles7 Norman6A Olmsted

7 Otter Tail7 Pennington7 Pine6A Pipestone7 Polk6A Pope6A Ramsey7 Red Lake6A Redwood6A Renville6A Rice6A Rock7 Roseau6A Scott6A Sherburne6A Sibley6A Stearns6A Steele6A Stevens7 St. Louis6A Swift6A Todd6A Traverse6A Wabasha7 Wadena6A Waseca6A Washington6A Watonwan7 Wilkin6A Winona6A Wright6A Yellow Medicine

MISSISSIPPI

3A Adams*3A Alcorn3A Amite*3A Attala3A Benton3A Bolivar3A Calhoun3A Carroll3A Chickasaw3A Choctaw3A Claiborne*

3A Clarke3A Clay3A Coahoma3A Copiah*3A Covington*3A DeSoto3A Forrest*3A Franklin*3A George*3A Greene*3A Grenada2A Hancock*2A Harrison*3A Hinds*3A Holmes3A Humphreys3A Issaquena3A Itawamba2A Jackson*3A Jasper3A Jefferson*3A Jefferson Davis*3A Jones*3A Kemper3A Lafayette3A Lamar*3A Lauderdale3A Lawrence*3A Leake3A Lee3A Leflore3A Lincoln*3A Lowndes3A Madison3A Marion*3A Marshall3A Monroe3A Montgomery3A Neshoba3A Newton3A Noxubee3A Oktibbeha3A Panola2A Pearl River*3A Perry*3A Pike*

GENERAL REQUIREMENTS

2012 INTERNATIONAL ENERGY CONSERVATION CODE® C-19

TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE, COUNTY AND TERRITORY

(continued)

3A Pontotoc3A Prentiss3A Quitman3A Rankin*3A Scott3A Sharkey3A Simpson*3A Smith*2A Stone*3A Sunflower3A Tallahatchie3A Tate3A Tippah3A Tishomingo3A Tunica3A Union3A Walthall*3A Warren*3A Washington3A Wayne*3A Webster3A Wilkinson*3A Winston3A Yalobusha3A Yazoo

MISSOURI

5A Adair5A Andrew5A Atchison4A Audrain4A Barry4A Barton4A Bates4A Benton4A Bollinger4A Boone5A Buchanan4A Butler5A Caldwell4A Callaway4A Camden4A Cape Girardeau4A Carroll4A Carter4A Cass4A Cedar

5A Chariton4A Christian5A Clark4A Clay5A Clinton4A Cole4A Cooper4A Crawford4A Dade4A Dallas5A Daviess5A DeKalb4A Dent4A Douglas4A Dunklin4A Franklin4A Gasconade5A Gentry4A Greene5A Grundy5A Harrison4A Henry4A Hickory5A Holt4A Howard4A Howell4A Iron4A Jackson4A Jasper4A Jefferson4A Johnson5A Knox4A Laclede4A Lafayette4A Lawrence5A Lewis4A Lincoln5A Linn5A Livingston5A Macon4A Madison4A Maries5A Marion4A McDonald5A Mercer4A Miller

4A Mississippi4A Moniteau4A Monroe4A Montgomery4A Morgan4A New Madrid4A Newton5A Nodaway4A Oregon4A Osage4A Ozark4A Pemiscot4A Perry4A Pettis4A Phelps5A Pike4A Platte4A Polk4A Pulaski5A Putnam5A Ralls4A Randolph4A Ray4A Reynolds4A Ripley4A Saline5A Schuyler5A Scotland4A Scott4A Shannon5A Shelby4A St. Charles4A St. Clair4A Ste. Genevieve4A St. Francois4A St. Louis4A St. Louis (city)4A Stoddard4A Stone5A Sullivan4A Taney4A Texas4A Vernon4A Warren4A Washington4A Wayne

4A Webster5A Worth4A Wright

MONTANA

6B (all)

NEBRASKA

5A (all)

NEVADA

5B Carson City (city)5B Churchill3B Clark5B Douglas5B Elko5B Esmeralda5B Eureka5B Humboldt5B Lander5B Lincoln5B Lyon5B Mineral5B Nye5B Pershing5B Storey5B Washoe5B White Pine

NEW HAMPSHIRE

6A Belknap6A Carroll5A Cheshire6A Coos6A Grafton5A Hillsborough6A Merrimack5A Rockingham5A Strafford6A Sullivan

NEW JERSEY

4A Atlantic5A Bergen4A Burlington4A Camden4A Cape May

4A Cumberland4A Essex4A Gloucester4A Hudson5A Hunterdon5A Mercer4A Middlesex4A Monmouth5A Morris4A Ocean5A Passaic4A Salem5A Somerset5A Sussex4A Union5A Warren

NEW MEXICO

4B Bernalillo5B Catron3B Chaves4B Cibola5B Colfax4B Curry4B DeBaca3B Dona Ana3B Eddy4B Grant4B Guadalupe5B Harding3B Hidalgo3B Lea4B Lincoln5B Los Alamos3B Luna5B McKinley5B Mora3B Otero4B Quay5B Rio Arriba4B Roosevelt5B Sandoval5B San Juan5B San Miguel5B Santa Fe4B Sierra4B Socorro

GENERAL REQUIREMENTS

C-20 2012 INTERNATIONAL ENERGY CONSERVATION CODE®

5B Taos5B Torrance4B Union4B Valencia

NEW YORK

5A Albany6A Allegany4A Bronx6A Broome6A Cattaraugus5A Cayuga5A Chautauqua5A Chemung6A Chenango6A Clinton5A Columbia5A Cortland6A Delaware5A Dutchess5A Erie6A Essex6A Franklin6A Fulton5A Genesee5A Greene6A Hamilton6A Herkimer6A Jefferson4A Kings6A Lewis5A Livingston6A Madison5A Monroe6A Montgomery4A Nassau4A New York5A Niagara6A Oneida5A Onondaga5A Ontario5A Orange5A Orleans5A Oswego6A Otsego5A Putnam

4A Queens5A Rensselaer4A Richmond5A Rockland5A Saratoga5A Schenectady6A Schoharie6A Schuyler5A Seneca6A Steuben6A St. Lawrence4A Suffolk6A Sullivan5A Tioga6A Tompkins6A Ulster6A Warren5A Washington5A Wayne4A Westchester6A Wyoming5A Yates

NORTHCAROLINA

4A Alamance4A Alexander5A Alleghany3A Anson5A Ashe5A Avery3A Beaufort4A Bertie3A Bladen3A Brunswick*4A Buncombe4A Burke3A Cabarrus4A Caldwell3A Camden3A Carteret*4A Caswell4A Catawba4A Chatham4A Cherokee3A Chowan

4A Clay4A Cleveland3A Columbus*3A Craven3A Cumberland3A Currituck3A Dare3A Davidson4A Davie3A Duplin4A Durham3A Edgecombe4A Forsyth4A Franklin3A Gaston4A Gates4A Graham4A Granville3A Greene4A Guilford4A Halifax4A Harnett4A Haywood4A Henderson4A Hertford3A Hoke3A Hyde4A Iredell4A Jackson3A Johnston3A Jones4A Lee3A Lenoir4A Lincoln4A Macon4A Madison3A Martin4A McDowell3A Mecklenburg5A Mitchell3A Montgomery3A Moore4A Nash3A New Hanover*4A Northampton3A Onslow*

4A Orange3A Pamlico3A Pasquotank3A Pender*3A Perquimans4A Person3A Pitt4A Polk3A Randolph3A Richmond3A Robeson4A Rockingham3A Rowan4A Rutherford3A Sampson3A Scotland3A Stanly4A Stokes4A Surry4A Swain4A Transylvania3A Tyrrell3A Union4A Vance4A Wake4A Warren3A Washington5A Watauga3A Wayne4A Wilkes3A Wilson4A Yadkin5A Yancey

NORTH DAKOTA

6A Adams7 Barnes7 Benson6A Billings7 Bottineau6A Bowman7 Burke6A Burleigh7 Cass7 Cavalier6A Dickey

7 Divide6A Dunn7 Eddy6A Emmons7 Foster6A Golden Valley7 Grand Forks6A Grant7 Griggs6A Hettinger7 Kidder6A LaMoure6A Logan7 McHenry6A McIntosh6A McKenzie7 McLean6A Mercer6A Morton7 Mountrail7 Nelson6A Oliver7 Pembina7 Pierce7 Ramsey6A Ransom7 Renville6A Richland7 Rolette6A Sargent7 Sheridan6A Sioux6A Slope6A Stark7 Steele7 Stutsman7 Towner7 Traill7 Walsh7 Ward7 Wells7 Williams

OHIO

4A Adams5A Allen

TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE, COUNTY AND TERRITORY

(continued)

GENERAL REQUIREMENTS

2012 INTERNATIONAL ENERGY CONSERVATION CODE® C-21

5A Ashland5A Ashtabula5A Athens5A Auglaize5A Belmont4A Brown5A Butler5A Carroll5A Champaign5A Clark4A Clermont5A Clinton5A Columbiana5A Coshocton5A Crawford5A Cuyahoga5A Darke5A Defiance5A Delaware5A Erie5A Fairfield5A Fayette5A Franklin5A Fulton4A Gallia5A Geauga5A Greene5A Guernsey4A Hamilton5A Hancock5A Hardin5A Harrison5A Henry5A Highland5A Hocking5A Holmes5A Huron5A Jackson5A Jefferson5A Knox5A Lake4A Lawrence5A Licking5A Logan5A Lorain5A Lucas5A Madison

5A Mahoning5A Marion5A Medina5A Meigs5A Mercer5A Miami5A Monroe5A Montgomery5A Morgan5A Morrow5A Muskingum5A Noble5A Ottawa5A Paulding5A Perry5A Pickaway4A Pike5A Portage5A Preble5A Putnam5A Richland5A Ross5A Sandusky4A Scioto5A Seneca5A Shelby5A Stark5A Summit5A Trumbull5A Tuscarawas5A Union5A Van Wert5A Vinton5A Warren4A Washington5A Wayne5A Williams5A Wood5A Wyandot

OKLAHOMA

3A Adair3A Alfalfa3A Atoka4B Beaver3A Beckham3A Blaine

3A Bryan3A Caddo3A Canadian3A Carter3A Cherokee3A Choctaw4B Cimarron3A Cleveland3A Coal3A Comanche3A Cotton3A Craig3A Creek3A Custer3A Delaware3A Dewey3A Ellis3A Garfield3A Garvin3A Grady3A Grant3A Greer3A Harmon3A Harper3A Haskell3A Hughes3A Jackson3A Jefferson3A Johnston3A Kay3A Kingfisher3A Kiowa3A Latimer3A Le Flore3A Lincoln3A Logan3A Love3A Major3A Marshall3A Mayes3A McClain3A McCurtain3A McIntosh3A Murray3A Muskogee3A Noble3A Nowata

3A Okfuskee3A Oklahoma3A Okmulgee3A Osage3A Ottawa3A Pawnee3A Payne3A Pittsburg3A Pontotoc3A Pottawatomie3A Pushmataha3A Roger Mills3A Rogers3A Seminole3A Sequoyah3A Stephens4B Texas3A Tillman3A Tulsa3A Wagoner3A Washington3A Washita3A Woods3A Woodward

OREGON

5B Baker4C Benton4C Clackamas4C Clatsop4C Columbia4C Coos5B Crook4C Curry5B Deschutes4C Douglas5B Gilliam5B Grant5B Harney5B Hood River4C Jackson5B Jefferson4C Josephine5B Klamath5B Lake4C Lane4C Lincoln

4C Linn5B Malheur4C Marion5B Morrow4C Multnomah4C Polk5B Sherman4C Tillamook5B Umatilla5B Union5B Wallowa5B Wasco4C Washington5B Wheeler4C Yamhill

PENNSYLVANIA

5A Adams5A Allegheny5A Armstrong5A Beaver5A Bedford5A Berks5A Blair5A Bradford4A Bucks5A Butler5A Cambria6A Cameron5A Carbon5A Centre4A Chester5A Clarion6A Clearfield5A Clinton5A Columbia5A Crawford5A Cumberland5A Dauphin4A Delaware6A Elk5A Erie5A Fayette5A Forest5A Franklin5A Fulton5A Greene

TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE, COUNTY AND TERRITORY

(continued)

GENERAL REQUIREMENTS

C-22 2012 INTERNATIONAL ENERGY CONSERVATION CODE®

5A Huntingdon5A Indiana5A Jefferson5A Juniata5A Lackawanna5A Lancaster5A Lawrence5A Lebanon5A Lehigh5A Luzerne5A Lycoming6A McKean5A Mercer5A Mifflin5A Monroe4A Montgomery5A Montour5A Northampton5A Northumberland5A Perry4A Philadelphia5A Pike6A Potter5A Schuylkill5A Snyder5A Somerset5A Sullivan6A Susquehanna6A Tioga5A Union5A Venango5A Warren5A Washington6A Wayne5A Westmoreland5A Wyoming4A York

RHODE ISLAND

5A (all)

SOUTHCAROLINA

3A Abbeville3A Aiken3A Allendale*3A Anderson

3A Bamberg*3A Barnwell*3A Beaufort*3A Berkeley*3A Calhoun3A Charleston*3A Cherokee3A Chester3A Chesterfield3A Clarendon3A Colleton*3A Darlington3A Dillon3A Dorchester*3A Edgefield3A Fairfield3A Florence3A Georgetown*3A Greenville3A Greenwood3A Hampton*3A Horry*3A Jasper*3A Kershaw3A Lancaster3A Laurens3A Lee3A Lexington3A Marion3A Marlboro3A McCormick3A Newberry3A Oconee3A Orangeburg3A Pickens3A Richland3A Saluda3A Spartanburg3A Sumter3A Union3A Williamsburg3A York

SOUTH DAKOTA

6A Aurora6A Beadle

5A Bennett5A Bon Homme6A Brookings6A Brown6A Brule6A Buffalo6A Butte6A Campbell5A Charles Mix6A Clark5A Clay6A Codington6A Corson6A Custer6A Davison6A Day6A Deuel6A Dewey5A Douglas6A Edmunds6A Fall River6A Faulk6A Grant5A Gregory6A Haakon6A Hamlin6A Hand6A Hanson6A Harding6A Hughes5A Hutchinson6A Hyde5A Jackson6A Jerauld6A Jones6A Kingsbury6A Lake6A Lawrence6A Lincoln6A Lyman6A Marshall6A McCook6A McPherson6A Meade5A Mellette6A Miner

6A Minnehaha6A Moody6A Pennington6A Perkins6A Potter6A Roberts6A Sanborn6A Shannon6A Spink6A Stanley6A Sully5A Todd5A Tripp6A Turner5A Union6A Walworth5A Yankton6A Ziebach

TENNESSEE

4A Anderson4A Bedford4A Benton4A Bledsoe4A Blount4A Bradley4A Campbell4A Cannon4A Carroll4A Carter4A Cheatham3A Chester4A Claiborne4A Clay4A Cocke4A Coffee3A Crockett4A Cumberland4A Davidson4A Decatur4A DeKalb4A Dickson3A Dyer3A Fayette4A Fentress4A Franklin

4A Gibson4A Giles4A Grainger4A Greene4A Grundy4A Hamblen4A Hamilton4A Hancock3A Hardeman3A Hardin4A Hawkins3A Haywood3A Henderson4A Henry4A Hickman4A Houston4A Humphreys4A Jackson4A Jefferson4A Johnson4A Knox3A Lake3A Lauderdale4A Lawrence4A Lewis4A Lincoln4A Loudon4A Macon3A Madison4A Marion4A Marshall4A Maury4A McMinn3A McNairy4A Meigs4A Monroe4A Montgomery4A Moore4A Morgan4A Obion4A Overton4A Perry4A Pickett4A Polk4A Putnam4A Rhea

TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE, COUNTY AND TERRITORY

(continued)

GENERAL REQUIREMENTS

2012 INTERNATIONAL ENERGY CONSERVATION CODE® C-23

TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE, COUNTY AND TERRITORY

4A Roane4A Robertson4A Rutherford4A Scott4A Sequatchie4A Sevier3A Shelby4A Smith4A Stewart4A Sullivan4A Sumner3A Tipton4A Trousdale4A Unicoi4A Union4A Van Buren4A Warren4A Washington4A Wayne4A Weakley4A White4A Williamson4A Wilson

TEXAS

2A Anderson*3B Andrews2A Angelina*2A Aransas*3A Archer4B Armstrong2A Atascosa*2A Austin*4B Bailey2B Bandera*2A Bastrop*3B Baylor2A Bee*2A Bell*2A Bexar*3A Blanco*3B Borden2A Bosque*3A Bowie*2A Brazoria*2A Brazos*

3B Brewster4B Briscoe2A Brooks*3A Brown*2A Burleson*3A Burnet*2A Caldwell*2A Calhoun*3B Callahan2A Cameron*3A Camp*4B Carson3A Cass*4B Castro2A Chambers*2A Cherokee*3B Childress3A Clay4B Cochran3B Coke3B Coleman3A Collin*3B Collingsworth2A Colorado*2A Comal*3A Comanche*3B Concho3A Cooke2A Coryell*3B Cottle3B Crane3B Crockett3B Crosby3B Culberson4B Dallam3A Dallas*3B Dawson4B Deaf Smith3A Delta3A Denton*2A DeWitt*3B Dickens2B Dimmit*4B Donley2A Duval*3A Eastland

3B Ector2B Edwards*3A Ellis*3B El Paso3A Erath*2A Falls*3A Fannin2A Fayette*3B Fisher4B Floyd3B Foard2A Fort Bend*3A Franklin*2A Freestone*2B Frio*3B Gaines2A Galveston*3B Garza3A Gillespie*3B Glasscock2A Goliad*2A Gonzales*4B Gray3A Grayson3A Gregg*2A Grimes*2A Guadalupe*4B Hale3B Hall3A Hamilton*4B Hansford3B Hardeman2A Hardin*2A Harris*3A Harrison*4B Hartley3B Haskell2A Hays*3B Hemphill3A Henderson*2A Hidalgo*2A Hill*4B Hockley3A Hood*3A Hopkins*2A Houston*

3B Howard3B Hudspeth3A Hunt*4B Hutchinson3B Irion3A Jack2A Jackson*2A Jasper*3B Jeff Davis2A Jefferson*2A Jim Hogg*2A Jim Wells*3A Johnson*3B Jones2A Karnes*3A Kaufman*3A Kendall*2A Kenedy*3B Kent3B Kerr3B Kimble3B King2B Kinney*2A Kleberg*3B Knox3A Lamar*4B Lamb3A Lampasas*2B La Salle*2A Lavaca*2A Lee*2A Leon*2A Liberty*2A Limestone*4B Lipscomb2A Live Oak*3A Llano*3B Loving3B Lubbock3B Lynn2A Madison*3A Marion*3B Martin3B Mason2A Matagorda*2B Maverick*

3B McCulloch2A McLennan*2A McMullen*2B Medina*3B Menard3B Midland2A Milam*3A Mills*3B Mitchell3A Montague2A Montgomery*4B Moore3A Morris*3B Motley3A Nacogdoches*3A Navarro*2A Newton*3B Nolan2A Nueces*4B Ochiltree4B Oldham2A Orange*3A Palo Pinto*3A Panola*3A Parker*4B Parmer3B Pecos2A Polk*4B Potter3B Presidio3A Rains*4B Randall3B Reagan2B Real*3A Red River*3B Reeves2A Refugio*4B Roberts2A Robertson*3A Rockwall*3B Runnels3A Rusk*3A Sabine*3A San Augustine*2A San Jacinto*2A San Patricio*

(continued)

GENERAL REQUIREMENTS

C-24 2012 INTERNATIONAL ENERGY CONSERVATION CODE®

TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE, COUNTY AND TERRITORY

3A San Saba*3B Schleicher3B Scurry3B Shackelford3A Shelby*4B Sherman3A Smith*3A Somervell*2A Starr*3A Stephens3B Sterling3B Stonewall3B Sutton4B Swisher3A Tarrant*3B Taylor3B Terrell3B Terry3B Throckmorton3A Titus*3B Tom Green2A Travis*2A Trinity*2A Tyler*3A Upshur*3B Upton2B Uvalde*2B Val Verde*3A Van Zandt*2A Victoria*2A Walker*2A Waller*3B Ward2A Washington*2B Webb*2A Wharton*3B Wheeler3A Wichita3B Wilbarger2A Willacy*2A Williamson*2A Wilson*3B Winkler3A Wise3A Wood*4B Yoakum

3A Young2B Zapata*2B Zavala*

UTAH

5B Beaver6B Box Elder6B Cache6B Carbon6B Daggett5B Davis6B Duchesne5B Emery5B Garfield5B Grand5B Iron5B Juab5B Kane5B Millard6B Morgan5B Piute6B Rich5B Salt Lake5B San Juan5B Sanpete5B Sevier6B Summit5B Tooele6B Uintah5B Utah6B Wasatch3B Washington5B Wayne5B Weber

VERMONT

6A (all)

VIRGINIA

4A (all)

WASHINGTON

5B Adams5B Asotin5B Benton5B Chelan4C Clallam

4C Clark5B Columbia4C Cowlitz5B Douglas6B Ferry5B Franklin5B Garfield5B Grant4C Grays Harbor4C Island4C Jefferson4C King4C Kitsap5B Kittitas5B Klickitat4C Lewis5B Lincoln4C Mason6B Okanogan4C Pacific6B Pend Oreille4C Pierce4C San Juan4C Skagit5B Skamania4C Snohomish5B Spokane6B Stevens4C Thurston4C Wahkiakum5B Walla Walla4C Whatcom5B Whitman5B Yakima

WEST VIRGINIA

5A Barbour4A Berkeley4A Boone4A Braxton5A Brooke4A Cabell4A Calhoun4A Clay5A Doddridge5A Fayette

4A Gilmer5A Grant5A Greenbrier5A Hampshire5A Hancock5A Hardy5A Harrison4A Jackson4A Jefferson4A Kanawha5A Lewis4A Lincoln4A Logan5A Marion5A Marshall4A Mason4A McDowell4A Mercer5A Mineral4A Mingo5A Monongalia4A Monroe4A Morgan5A Nicholas5A Ohio5A Pendleton4A Pleasants5A Pocahontas5A Preston4A Putnam5A Raleigh5A Randolph4A Ritchie4A Roane5A Summers5A Taylor5A Tucker4A Tyler5A Upshur4A Wayne5A Webster5A Wetzel4A Wirt4A Wood4A Wyoming

WISCONSIN

6A Adams7 Ashland6A Barron7 Bayfield6A Brown6A Buffalo7 Burnett6A Calumet6A Chippewa6A Clark6A Columbia6A Crawford6A Dane6A Dodge6A Door7 Douglas6A Dunn6A Eau Claire7 Florence6A Fond du Lac7 Forest6A Grant6A Green6A Green Lake6A Iowa7 Iron6A Jackson6A Jefferson6A Juneau6A Kenosha6A Kewaunee6A La Crosse6A Lafayette7 Langlade7 Lincoln6A Manitowoc6A Marathon6A Marinette6A Marquette6A Menominee6A Milwaukee6A Monroe6A Oconto7 Oneida6A Outagamie

(continued)

GENERAL REQUIREMENTS

2012 INTERNATIONAL ENERGY CONSERVATION CODE® C-25

TABLE C301.3(1) INTERNATIONAL CLIMATE ZONE DEFINITIONS

For SI: °C = [(°F)-32]/1.8, 1 inch = 2.54 cm.

MAJOR CLIMATE TYPE DEFINITIONS

Marine (C) Definition—Locations meeting all four criteria:

1. Mean temperature of coldest month between -3°C (27°F) and 18°C (65°F).

2. Warmest month mean < 22°C (72°F).

3. At least four months with mean temperatures over 10°C (50°F).

4. Dry season in summer. The month with the heaviest precipitation in the cold season has at least three times as much precipitation as themonth with the least precipitation in the rest of the year. The cold season is October through March in the Northern Hemisphere andApril through September in the Southern Hemisphere.

Dry (B) Definition—Locations meeting the following criteria:

Not marine and Pin < 0.44 × (TF - 19.5) [Pcm < 2.0 × (TC + 7) in SI units]where:

Pin = Annual precipitation in inches (cm)T = Annual mean temperature in °F (°C)

Moist (A) Definition—Locations that are not marine and not dry.

Warm-humid Definition—Moist (A) locations where either of the following wet-bulb temperature conditions shall occur during the warmest six consecutive months of the year:

1. 67°F (19.4°C) or higher for 3,000 or more hours; or

2. 73°F (22.8°C) or higher for 1,500 or more hours.

TABLE C301.1—continued CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE, COUNTY AND TERRITORY

6A Ozaukee6A Pepin6A Pierce6A Polk6A Portage7 Price6A Racine6A Richland6A Rock6A Rusk6A Sauk7 Sawyer6A Shawano6A Sheboygan6A St. Croix

7 Taylor6A Trempealeau6A Vernon7 Vilas6A Walworth7 Washburn6A Washington6A Waukesha6A Waupaca6A Waushara6A Winnebago6A Wood

WYOMING

6B Albany

6B Big Horn6B Campbell6B Carbon6B Converse6B Crook6B Fremont5B Goshen6B Hot Springs6B Johnson6B Laramie7 Lincoln6B Natrona6B Niobrara6B Park5B Platte

6B Sheridan7 Sublette6B Sweetwater7 Teton6B Uinta6B Washakie6B Weston

US TERRITORIES

AMERICANSAMOA

1A (all)*

GUAM

1A (all)*

NORTHERNMARIANAISLANDS

1A (all)*

PUERTO RICO

1A (all)*

VIRGIN ISLANDS

1A (all)*

GENERAL REQUIREMENTS

C-26 2012 INTERNATIONAL ENERGY CONSERVATION CODE®

SECTION C302 DESIGN CONDITIONS

C302.1 Interior design conditions. The interior design tem-peratures used for heating and cooling load calculations shallbe a maximum of 72°F (22°C) for heating and minimum of75°F (24°C) for cooling.

SECTION C303 MATERIALS, SYSTEMS AND EQUIPMENT

C303.1 Identification. Materials, systems and equipmentshall be identified in a manner that will allow a determinationof compliance with the applicable provisions of this code.

C303.1.1 Building thermal envelope insulation. An R-value identification mark shall be applied by the manufac-turer to each piece of building thermal envelope insulation12 inches (305 mm) or greater in width. Alternately, theinsulation installers shall provide a certification listing thetype, manufacturer and R-value of insulation installed ineach element of the building thermal envelope. For blownor sprayed insulation (fiberglass and cellulose), the initialinstalled thickness, settled thickness, settled R-value,installed density, coverage area and number of bagsinstalled shall be listed on the certification. For sprayedpolyurethane foam (SPF) insulation, the installed thick-ness of the areas covered and R-value of installed thick-ness shall be listed on the certification. The insulationinstaller shall sign, date and post the certification in a con-spicuous location on the job site.

C303.1.1.1 Blown or sprayed roof/ceiling insulation.The thickness of blown-in or sprayed roof/ceiling insu-lation (fiberglass or cellulose) shall be written in inches(mm) on markers that are installed at least one for every300 square feet (28 m2) throughout the attic space. Themarkers shall be affixed to the trusses or joists andmarked with the minimum initial installed thicknesswith numbers a minimum of 1 inch (25 mm) in height.Each marker shall face the attic access opening. Spraypolyurethane foam thickness and installed R-value shall

be listed on certification provided by the insulationinstaller.

C303.1.2 Insulation mark installation. Insulating mate-rials shall be installed such that the manufacturer’s R-value mark is readily observable upon inspection.

C303.1.3 Fenestration product rating. U-factors of fen-estration products (windows, doors and skylights) shall bedetermined in accordance with NFRC 100 by an accred-ited, independent laboratory, and labeled and certified bythe manufacturer. Products lacking such a labeled U-factorshall be assigned a default U-factor from TableC303.1.3(1) or C303.1.3(2). The solar heat gain coeffi-cient (SHGC) and visible transmittance (VT) of glazedfenestration products (windows, glazed doors and sky-lights) shall be determined in accordance with NFRC 200by an accredited, independent laboratory, and labeled andcertified by the manufacturer. Products lacking such alabeled SHGC or VT shall be assigned a default SHGC orVT from Table C303.1.3(3).

TABLE C301.3(2) INTERNATIONAL CLIMATE ZONE DEFINITIONS

For SI: °C = [(°F)-32]/1.8.

ZONENUMBER

THERMAL CRITERIA

IP Units SI Units

1 9000 < CDD50°F 5000 < CDD10°C

2 6300 < CDD50°F ≤ 9000 3500 < CDD10°C ≤ 5000

3A and 3B 4500 < CDD50°F ≤ 6300 AND HDD65°F ≤ 5400 2500 < CDD10°C ≤ 3500 AND HDD18°C ≤ 3000

4A and 4B CDD50°F ≤ 4500 AND HDD65°F ≤ 5400 CDD10°C ≤ 2500 AND HDD18°C ≤ 3000

3C HDD65°F ≤ 3600 HDD18°C ≤ 2000

4C 3600 < HDD65°F ≤ 5400 2000 < HDD18°C ≤ 3000

5 5400 < HDD65°F ≤ 7200 3000 < HDD18°C ≤ 4000

6 7200 < HDD65°F ≤ 9000 4000 < HDD18°C ≤ 5000

7 9000 < HDD65°F ≤ 12600 5000 < HDD18°C ≤ 7000

8 12600 < HDD65°F 7000 < HDD18°C

TABLE C303.1.3(1) DEFAULT GLAZED FENESTRATION U-FACTOR

FRAME TYPE SINGLEPANE

DOUBLEPANE

SKYLIGHT

Single Double

Metal 1.20 0.80 2.00 1.30

Metal with Thermal Break 1.10 0.65 1.90 1.10

Nonmetal or Metal Clad 0.95 0.55 1.75 1.05

Glazed Block 0.60

TABLE C303.1.3(2) DEFAULT DOOR U-FACTORS

DOOR TYPE U-FACTOR

Uninsulated Metal 1.20

Insulated Metal 0.60

Wood 0.50

Insulated, nonmetal edge, max 45% glazing, any glazing double pane

0.35

GENERAL REQUIREMENTS

2012 INTERNATIONAL ENERGY CONSERVATION CODE® C-27

C303.1.4 Insulation product rating. The thermal resis-tance (R-value) of insulation shall be determined in accor-dance with the U.S. Federal Trade Commission R-valuerule (CFR Title 16, Part 460) in units of h × ft2 × °F/Btu ata mean temperature of 75°F (24°C).

C303.2 Installation. All materials, systems and equipmentshall be installed in accordance with the manufacturer’sinstallation instructions and the International Building Code.

C303.2.1 Protection of exposed foundation insulation.Insulation applied to the exterior of basement walls, crawl-space walls and the perimeter of slab-on-grade floors shallhave a rigid, opaque and weather-resistant protective cov-ering to prevent the degradation of the insulation’s thermalperformance. The protective covering shall cover theexposed exterior insulation and extend a minimum of 6inches (153 mm) below grade.

C303.3 Maintenance information. Maintenance instruc-tions shall be furnished for equipment and systems thatrequire preventive maintenance. Required regular mainte-nance actions shall be clearly stated and incorporated on areadily accessible label. The label shall include the title orpublication number for the operation and maintenance man-ual for that particular model and type of product.

TABLE C303.1.3(3) DEFAULT GLAZED FENESTRATION SHGC AND VT

SINGLE GLAZED DOUBLE GLAZED GLAZED BLOCKClear Tinted Clear Tinted

SHGC 0.8 0.7 0.7 0.6 0.6

VT 0.6 0.3 0.6 0.3 0.6

C-28 2012 INTERNATIONAL ENERGY CONSERVATION CODE®