Idaho - HVAC JOURNEYMAN EXAM

Idaho HVAC Journeyman Exam: Complete Prep Guide for 2026

Picture this: you've spent years working under a master HVAC technician, learning the trade from the ground up. Now you're ready to take that next crucial step and earn your Idaho HVAC journeyman license. But there's one thing standing between you and that career advancement – the Idaho HVAC journeyman exam.

Passing this exam isn't just about proving your knowledge; it's about unlocking better job opportunities, higher pay, and the professional recognition you deserve. Whether you're wondering "Does Idaho require an HVAC license?" or "How to get a journeyman license in Idaho?", this comprehensive guide will walk you through everything you need to know to pass on your first attempt.

Idaho HVAC Journeyman Exam Overview

The Idaho HVAC journeyman exam is administered by PSI Services and consists of 100 multiple-choice questions that you'll need to complete within 240 minutes (4 hours). To earn your Idaho HVAC license, you must score at least 70% to pass.

This isn't a rushed exam – the generous time limit allows you to carefully read each question and reference your study materials. The test is open-book, meaning you can bring approved reference materials including the 2018 International Mechanical Code (IMC) and 2018 International Fuel Gas Code (IFGC).

The exam is computer-based and administered at PSI testing centers throughout Idaho. You can register for your exam through the exam registration page. For complete details about eligibility requirements and application procedures, check the official exam bulletin and visit Idaho's state licensing website.

What makes this exam particularly challenging is its comprehensive coverage of both mechanical and fuel gas codes, requiring you to understand not just HVAC principles but also safety regulations, installation requirements, and code compliance across multiple systems.

Exam Topics and Content Breakdown

The Idaho HVAC journeyman practice test covers two main code books with varying emphasis on different chapters:

2018 International Mechanical Code (IMC) - 65 questions:
- Chapter 1 (Administration) - 4 questions
- Chapter 2 (Definitions) - 7 questions
- Chapter 3 (General Regulations) - 9 questions
- Chapter 4 (Ventilation) - 5 questions
- Chapter 5 (Exhaust Systems) - 9 questions
- Chapter 6 (Duct Systems) - 4 questions
- Chapter 8 (Chimneys and Vents) - 4 questions
- Chapter 9 (Specific Appliances) - 3 questions
- Chapter 10 (Boilers, Water Heaters and Pressure Vessels) - 3 questions
- Chapter 11 (Refrigeration) - 5 questions
- Chapter 12 (Hydronic Piping) - 5 questions
- Chapter 13 (Fuel Oil Piping and Storage) - 4 questions
- Chapter 14 (Solar Systems) - 1 question

2018 International Fuel Gas Code (IFGC) - 35 questions:
- Chapter 1 (Scope and Administration) - 3 questions
- Chapter 2 (Definitions) - 3 questions
- Chapter 3 (General Regulations) - 6 questions
- Chapter 4 (Gas Piping Installations) - 7 questions
- Chapter 5 (Chimneys and Vents) - 8 questions
- Chapter 6 (Specific Appliances) - 5 questions
- Chapter 7 (Gaseous Hydrogen Systems) - 5 questions

The heaviest emphasis falls on IMC Chapters 3 and 5, and IFGC Chapter 5, so prioritize these areas in your journeyman HVAC study plan.

Sample Questions from the Idaho HVAC Journeyman Course

To give you a feel for what you'll encounter on test day, here are some sample questions similar to those on the actual exam:

Question 1: According to the IFGC, a single wall-mounted unvented room heater installed in a bathroom shall have an input rating not greater than 10,000 Btu/h.

Question 2: You are an HVAC journeyman installing a ventilation system for a new apartment building (Group R-2, three stories). The building has dwelling units with two bedrooms each and 1,200 square feet of floor area. Using Equation 4-9 from the 2018 IMC, what is the minimum continuous outdoor airflow rate for each unit?
A) 30 cfm
B) 34.5 cfm
C) 45 cfm
D) 52.5 cfm

Question 3: You are installing a single-wall metal vent pipe for a draft-hood-equipped gas furnace. The pipe must pass through a combustible exterior wall. If the pipe has at least a 6-foot run in the open between the draft hood outlet and the thimble, what is the minimum size the ventilated metal thimble must be larger than the pipe diameter?
A) 2 inches larger in diameter
B) 4 inches larger in diameter
C) 6 inches larger in diameter
D) 12 inches larger in diameter

Question 4: As an HVAC journeyman, you are called to install a gas water heater in an unfinished attic space. You plan to use single-wall metal pipe for the vent connector. According to the IFGC, is this installation permitted?
A) Yes, single-wall metal pipe is permitted in any location as long as clearances are maintained
B) No, single-wall metal pipe shall not originate in any unoccupied attic or concealed space and shall not pass through any attic
C) Yes, but only if the pipe is wrapped with insulation
D) Yes, but only if the attic has mechanical ventilation

Question 5: You are an HVAC journeyman called to a commercial building where a new high-efficiency furnace with a 200,000 BTU/hr input rating is being added to an existing gas piping system that already serves two other appliances. Upon inspecting the existing piping, you determine it does not have adequate capacity for the additional appliance. According to the IFGC, what must be done?
A) Install a booster pump on the existing gas line to increase flow capacity
B) Reduce the input rating of the new furnace to match the existing pipe capacity
C) The existing system shall be enlarged as required or separate piping of adequate capacity shall be provided
D) Notify the gas utility to increase the meter size only, as the piping can handle the additional load at higher pressure

These questions demonstrate the practical, scenario-based nature of the exam. Want to test your knowledge? Try our free practice exam to see how you'd perform!

What Types of Questions to Expect

The Idaho HVAC journeyman practice test draws from a comprehensive question pool covering every aspect of mechanical and fuel gas systems. Here's what you can expect:

Fuel Gas Code Questions (IFGC):
- General Regulations (Chapter 3): Appliance installation requirements, clearances, and ventilation needs
- Gas Piping (Chapter 4): Sizing calculations, materials, installation methods, and pressure testing
- Venting Systems (Chapter 5): Vent sizing, clearances, materials, and installation requirements for different appliance types
- Specific Appliances (Chapter 6): Installation requirements for ranges, dryers, pool heaters, and other gas appliances

Mechanical Code Questions (IMC):
- General Regulations (Chapter 3): Equipment installation, access requirements, and protection methods
- Ventilation (Chapter 4): Airflow calculations, outdoor air requirements, and system design
- Exhaust Systems (Chapter 5): Commercial kitchen hoods, bathroom fans, and hazardous exhaust requirements
- Refrigeration (Chapter 11): System installation, safety requirements, and refrigerant handling
- Hydronic Systems (Chapter 12): Piping installation, expansion tanks, and pressure relief

With over 500 practice questions available across all these topics, you'll have plenty of opportunities to test your knowledge and identify areas needing more study.

Essential Study Materials for Your Idaho HVAC License

Success on the Idaho HVAC journeyman exam requires the right study materials and organization tools:

Required Code Books:
- 2018 International Mechanical Code (IMC)
- 2018 International Fuel Gas Code (IFGC)

Organization Tools:
Staying organized during your 4-hour exam is crucial. These Redi-Tag Permanent White Tabs are perfect for creating custom indexes in your code books. With 375 tabs per pack, you can mark frequently referenced sections, making code lookup lightning-fast during the exam. The laser-printable surface lets you create professional-looking custom labels.

For highlighting key sections and important notes, grab these Sharpie Highlighters. The pack includes 12 highlighters in assorted colors, perfect for color-coding different topics. The fluorescent ink stands out clearly, and the chisel tip works great for highlighting and underlining important passages.

Practice Materials:
Invest in quality practice exams that mirror the real test format. Look for materials that cover all exam topics with the same question distribution as the actual exam.

Study Tips for Idaho HVAC Journeyman Success

Passing the Idaho HVAC journeyman exam requires strategic preparation:

Focus on High-Weight Topics: Spend extra time on IMC Chapters 3 and 5, and IFGC Chapter 5, as these comprise the largest portions of the exam.

Master Code Navigation: Practice finding information quickly in both code books. Use tabs and highlighters to mark frequently referenced sections like sizing tables and clearance requirements.

Take Timed Practice Tests: Simulate exam conditions with full-length practice tests. This helps you develop time management skills and identify knowledge gaps.

Understand, Don't Memorize: Focus on understanding the reasoning behind code requirements rather than memorizing specific numbers. This helps you apply knowledge to scenario-based questions.

Review Calculations: Practice common calculations like vent sizing, gas piping, and ventilation airflow requirements. These often appear as multi-step problems.

Study Real-World Applications: The exam emphasizes practical scenarios you'll encounter as a working journeyman HVAC technician.

Frequently Asked Questions

Does Idaho require an HVAC license?
Yes, Idaho requires HVAC contractors and journeymen to be licensed. Working without a license can result in fines and legal issues.

How to get a journeyman license in Idaho?
You must meet experience requirements (typically 4 years), submit an application with required documentation, and pass the PSI-administered journeyman HVAC exam.

How long should I study for the exam?
Most candidates benefit from 4-6 weeks of dedicated study, spending 1-2 hours daily reviewing code books and taking practice tests.

Can I retake the exam if I fail?
Yes, you can retake the exam after a waiting period. Check the official bulletin for current retake policies and fees.

What's the best way to prepare?
Combine thorough code book study with comprehensive practice testing. Start with our free practice exam to assess your baseline knowledge, then use the full Idaho HVAC journeyman course for comprehensive preparation.

Take the Next Step Toward Your Idaho HVAC License

Earning your journeyman HVAC license in Idaho is a significant career milestone that opens doors to better opportunities and higher earnings. While the 100-question exam covering both mechanical and fuel gas codes might seem daunting, proper preparation makes success achievable.

Start your preparation today with our free practice exam to gauge your current knowledge level. When you're ready for comprehensive prep, our full Idaho HVAC journeyman course provides everything you need to pass with confidence. Your career advancement is just one exam away!