HVAC Permits in Montana
Complete guide to HVAC permit requirements, energy code compliance, and building department information for contractors working in Montana.
Montana Energy Code Requirements
Understanding the energy efficiency standards that govern HVAC installations in Montana
Current Energy Code
2021 IECC
Current Standard
Statewide energy efficiency requirements for HVAC systems, equipment, and building envelope performance.
Common Requirements
Important Note
Local jurisdictions may have additional requirements beyond the state energy code. Always verify specific compliance needs with your local building department.
HVAC Permits by City in Montana
Flathead
Zone 6BFlathead County • 17 ZIP codes
Cascade
Zone 6BCascade County • 15 ZIP codes
Yellowstone
Zone 6BYellowstone County • 14 ZIP codes
Missoula
Zone 6BMissoula County • 13 ZIP codes
Madison
Zone 6BMadison County • 12 ZIP codes
Lake
Zone 6BLake County • 11 ZIP codes
Carbon
Zone 6BCarbon County • 10 ZIP codes
Big Horn
Zone 6BBig Horn County • 10 ZIP codes
Sheridan
Zone 6BSheridan County • 9 ZIP codes
Lewis and Clark
Zone 6BLewis and Clark County • 9 ZIP codes
Ravalli
Zone 6BRavalli County • 9 ZIP codes
Rosebud
Zone 6BRosebud County • 8 ZIP codes
Park
Zone 6BPark County • 8 ZIP codes
Fergus
Zone 6BFergus County • 8 ZIP codes
Gallatin
Zone 6BGallatin County • 8 ZIP codes
Stillwater
Zone 6BStillwater County • 7 ZIP codes
Richland
Zone 6BRichland County • 7 ZIP codes
Chouteau
Zone 6BChouteau County • 7 ZIP codes
Blaine
Zone 6BBlaine County • 7 ZIP codes
Powell
Zone 6BPowell County • 7 ZIP codes
Sanders
Zone 6BSanders County • 7 ZIP codes
Lincoln
Zone 6BLincoln County • 7 ZIP codes
Phillips
Zone 6BPhillips County • 6 ZIP codes
Teton
Zone 6BTeton County • 6 ZIP codes
Toole
Zone 6BToole County • 6 ZIP codes
Beaverhead
Zone 6BBeaverhead County • 6 ZIP codes
Garfield
Zone 6BGarfield County • 5 ZIP codes
Powder River
Zone 6BPowder River County • 5 ZIP codes
Pondera
Zone 6BPondera County • 5 ZIP codes
Judith Basin
Zone 6BJudith Basin County • 5 ZIP codes
Jefferson
Zone 6BJefferson County • 5 ZIP codes
Silver Bow
Zone 6BSilver Bow County • 5 ZIP codes
Mineral
Zone 6BMineral County • 5 ZIP codes
Sweet Grass
Zone 6BSweet Grass County • 4 ZIP codes
Wheatland
Zone 6BWheatland County • 4 ZIP codes
McCone
Zone 6BMcCone County • 4 ZIP codes
Daniels
Zone 6BDaniels County • 4 ZIP codes
Dawson
Zone 6BDawson County • 4 ZIP codes
Glacier
Zone 6BGlacier County • 4 ZIP codes
Liberty
Zone 6BLiberty County • 4 ZIP codes
Treasure
Zone 6BTreasure County • 3 ZIP codes
Meagher
Zone 6BMeagher County • 3 ZIP codes
Musselshell
Zone 6BMusselshell County • 3 ZIP codes
Roosevelt
Zone 6BRoosevelt County • 3 ZIP codes
Custer
Zone 6BCuster County • 3 ZIP codes
Carter
Zone 6BCarter County • 3 ZIP codes
Fallon
Zone 6BFallon County • 3 ZIP codes
Granite
Zone 6BGranite County • 3 ZIP codes
Valley
Zone 6BValley County • 2 ZIP codes
Prairie
Zone 6BPrairie County • 2 ZIP codes
Broadwater
Zone 6BBroadwater County • 2 ZIP codes
Deer Lodge
Zone 6BDeer Lodge County • 2 ZIP codes
Petroleum
Zone 6BPetroleum County • 1 ZIP codes
Wibaux
Zone 6BWibaux County • 1 ZIP codes
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Frequently Asked Questions
Everything you need to know about HVAC permits and energy code compliance in Montana
1What energy code does Montana follow?
Montana follows the 2021 IECC for energy efficiency requirements. This includes specific standards for HVAC equipment efficiency, duct design, and building envelope performance.
2Are Manual J calculations required in Montana?
Most jurisdictions in Montana require Manual J load calculations for proper HVAC system sizing. Our free load calculation tool can generate the professional reports you need for permits.
3How long does it take to get HVAC permits in Montana?
Permit processing times vary by jurisdiction, typically ranging from 1-3 weeks. Having complete documentation including load calculations can speed up the process. Check with your local building department for specific timeframes.
4Do I need different permits for different types of HVAC work?
Yes, permit requirements vary based on the scope of work. New installations typically require mechanical permits, while simple repairs may not need permits. Replacements usually require permits if there are changes to the system capacity or ductwork.
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Get official IECC climate zone information, design temperatures, and R-value requirements for accurate Manual J calculations in Montana.
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