Climate ZonesMainePenobscot

Penobscot, Maine HVAC Climate Zone

Penobscot is located in IECC Climate Zone 6A (Cold - Humid). Get accurate Manual J load calculations with official design temperatures for Penobscot.

Climate Zone
6A
Winter Design
-9°F
Summer Design
89°F
ZIP Codes
43

Penobscot HVAC Contractors: Get Your Free Manual J Report

Climate Zone 6A requires precise load calculations. Upload your Penobscot blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Penobscot's exact design temperatures (-9°F winter / 89°F summer).

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Verify Your Penobscot ZIP Code

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

Penobscot covers 43 ZIP codes: 04401, 04410, 04411, 04412, 04417, 04418, 04419, 04422, 04427, 04428 and 33 more

Penobscot Design Temperatures

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

Winter 99% Design Temp
-9°F
Summer 1% Design Temp
89°F
Summer Wet Bulb
73°F

IECC Requirements for Zone 6A

Minimum insulation and window requirements for Penobscot per IECC 2021.

Wall Insulation:R-20
Roof/Ceiling:R-49
Floor Insulation:R-30
Window U-Factor:0.3
Window SHGC:0.4

Energy Code: 2021 IECC

Recommended HVAC Equipment for Penobscot

Heating Systems

Gas furnace (96%+ AFUE)
Boiler
Cold climate heat pump
Typical AFUE
96-98%

Cooling Systems

AC (13-15 SEER)
Typical SEER
13-15 SEER

Related Climate Zone Pages

Learn More About
Climate Zone 6A
View All Zones in
Maine
HVAC Permits for
Penobscot, Maine

Get Free Manual J Calculations for Penobscot

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Penobscot design temps
Zone 6A compliant
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