Each Climate zone has a unique climatic condition that dictates which minimum efficiency requirements are needed for that specific climate zone. For an example; Climate zone 12 is bounded by other surrounding climate zones such as 11, 16, 13, 4, 3, and 2 and each with its unique weather characteristics.

1. California
Building Climate Zones
Clear Lak e
Goos e
Lake Legend
Reservoir
9
!
" 6
Climate Zones
¢
¡
1 0 1
Crescent City S
# Yreka
DEL NORTE S
#
MODOC
1 9
SISKIYOU
§
¦
¨ 5
2 10
Klamath
S
# £
¤97
S
# Alturas
S Weed
#
3 11
4 12
S Dunsmuir
# S
# Lookout
5 13
6 14
LASSEN
Arcata S Burney
# £
¤
395
S
#
R
Q
299 Trinity
7 15
Eureka S
#
Lake
Shasta
R
Q 89 R
Q
139
Weaverville Lake
S
#
8 16
1
HUMBOLDT Whiskeytown
Lake
R
Q
299 Eagle
Lake
S Redding
#
S
# Hayfork
R
Q
44
R
Q36 R
Q36
Other Features
Susanville S
#
S
# Cottonwood
City
R
Q 36 Chester S
#
Almanor
S
# Westwood Honey
Lake S
#
Lake
Roads
£
¤101
S
# Red Bluff
County Line
TEHAMA
S Tehama
# PLUMAS
Water Body
11
Quincy S
#
S Portola
#
S Paradise
#
S#
Chico S Loyalton
#
BUTTE
GLENN SIERRA
Lake
Oroville S
#
Willows Glenn Oroville Downieville
S
# S
# S
#
MENDOCINO
Fort Bragg S
#
S
# Willits
S
#
§
¦
¨
16
80
Soda Springs
Tahoe Vista
S Nevada City
# SS
##
Kings Beach
2
YUBA
LAKE COLUSA S Colusa
#
Sutter NEVADA PLACER
S# S
# Lake
S Ukiah
# SS Marysville
##
Williams Tahoe
Yuba City
Lakeport
S
# Clearlake
R
Q20
SUTTER
S
#
S Clearlake
#
R
Q 70 S South Lake Tahoe
#
Point Arena S
#
Kelseyville
R
Q
99 R
Q 65
S
# Auburn
S
# Cloverdale R
Q 70 S Coloma
#
£
¤
S Woodfords
#
YOLO §
¦
¨ 5
R
Q 99 S Roseville Folsom
#
Lake S Placerville
#
50
S Markleeville
#
S
#
Citrus Heights EL DORADO
S
# Woodland
ALPINE
NAPA R
Q
Lake
Berry essa
§
¦
¨
505
R
Q
113
_
^
S Sacramento
#
49
Santa Rosa
S Saint Helena
# R
Q
16
AMADOR
S
# S Dixon
#
SACRAMENTO
SONOMA S Yountville
# Ione
S
# S Jackson
#
Napa
S Bridgeport
#
S
# SOLANO Camanche
£
¤101
S
#
Fairfield
S
#
Galt
Reservoir CALAVERAS MONO
S San Andreas
#
R
Q12
12
S Murphys
#
New Hogan
MARIN S Lodi
# Reservoir
Vallejo S
# TUOLUMNE Mono
S
#
S Benicia
#
SAN JOAQUIN Q
R
26 Lake
Point Reyes Station S
#
S Martinez
# Pittsburg S Sonora
# S Lee Vining
#
San Rafael S
#
§
¦
¨80 S Stockton
# R
Q
4 S
#
Jamestown
CONTRA COSTA
S
#
S Berkeley Lafayette
#
Sausalito S
#
Manteca
San Francisco S
#
S Oakland
#
S
#
§
¦
¨
680 S
# Don Pedro
Reservoir £
¤
395
S Tracy
#
Alameda
S El Portal
#
Daly City S
#
S Livermore
# R
Q 99
S Modesto
# Lake S Mammoth Lakes
#
ALAMEDA S Ceres
#
Mc Clure MARIPOSA
§
¦
¨ 5
R
Q59
3
S Mariposa
#
Redwood City
S
# STANISLAUS
Half Moon Bay S
# S Bishop
#
SAN MATEO
Mountain View
S
# R
Q
140
S
# S Merced
#
San Jose
SANTA CLARA R
Q
41
MERCED S
#
S Morgan Hill
# Chowchilla
SANTA CRUZ MADERA
San Luis S Los Banos
#
S Scotts Valley
# Reservoir R
Q
99
S Madera
#
S
#
Pine Flat
Santa Cruz Reservoir
S Independence
#
S Hollister
#
Moss Landing S
# Fresno
S#
INYO
S Salinas
#
FRESNO
S Selma
# S Death Valley
#
13
£
¤101
Visalia
4
S Hanford