Climate ZonesArizonaPhoenix

Phoenix, Arizona HVAC Climate Zone

Phoenix is located in IECC Climate Zone 2B (Hot - Dry). Get accurate Manual J load calculations with official design temperatures for Phoenix.

Climate Zone
2B
Winter Design
31°F
Summer Design
108°F
ZIP Codes
66

Phoenix HVAC Contractors: Get Your Free Manual J Report

Climate Zone 2B requires precise load calculations. Upload your Phoenix blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Phoenix's exact design temperatures (31°F winter / 108°F summer).

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Verify Your Phoenix ZIP Code

Enter your ZIP code to confirm it's in Phoenix and get climate zone details.

Phoenix covers 66 ZIP codes: 85001, 85002, 85003, 85004, 85005, 85006, 85007, 85008, 85009, 85010 and 56 more

Phoenix Design Temperatures

Official ASHRAE design temperatures for Phoenix, used for accurate Manual J load calculations.

Winter 99% Design Temp
31°F
Summer 1% Design Temp
108°F
Summer Wet Bulb
71°F

IECC Requirements for Zone 2B

Minimum insulation and window requirements for Phoenix per IECC 2021.

Wall Insulation:R-13
Roof/Ceiling:R-30
Floor Insulation:R-13
Window U-Factor:0.4
Window SHGC:0.25

Energy Code: 2021 IECC

Recommended HVAC Equipment for Phoenix

Heating Systems

Gas furnace
Heat pump
Electric resistance
Typical AFUE
80-90%

Cooling Systems

AC (14-16 SEER)
Evaporative cooling (swamp cooler)
Typical SEER
14-16 SEER

Related Climate Zone Pages

Learn More About
Climate Zone 2B
View All Zones in
Arizona
HVAC Permits for
Phoenix, Arizona

Get Free Manual J Calculations for Phoenix

Upload your Phoenix blueprint and get a professional Manual J load calculation using official Zone 2B design temperatures. First report is FREE.

Phoenix design temps
Zone 2B compliant
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