- GCA-II is Georgia's Class II unrestricted Conditioned Air Contractor license exam, administered by PSI for the state Board.
- The test has 100 scored questions plus 20 unscored pretest items, split across two 3.5-hour sessions.
- Passing requires a scaled score of 70; the exam is open book using PSI's approved references.
- Applicants need five years of qualifying experience above Class I's 175,000 BTU heating / 60,000 BTU cooling limits.
What GCA-II Actually Stands For
GCA-II is shorthand for the Georgia Conditioned Air Contractor Class II Examination - the state licensing test that permits a contractor to work on conditioned-air systems without the tonnage and BTU ceilings that apply to the entry-level Class I license. This is a Georgia-specific occupational license tied to the Georgia State Construction Industry Licensing Board, not a national or manufacturer-issued credential. If you've landed here searching for a broader definition, our companion pages on GCA-II Meaning and What Does GCA-II Stand For? walk through the terminology in more detail.
Because "GCA-II" is a common abbreviation pattern, it's worth being precise: this article covers only the Georgia conditioned air licensing exam. Every fact below - fees, hours, domains, references - applies specifically to that credential and to no other program that happens to share the same letters.
Who Regulates and Administers the Exam
The Georgia State Construction Industry Licensing Board's Division of Conditioned Air Contractors sets the licensing rules, reviews applications, and approves candidates to test. Once the Board clears an applicant, PSI - a third-party testing company - administers the actual examination at approved test centers. This two-party structure means your paperwork and eligibility review happen with the Board, while your seat reservation, testing rules, and score reporting happen through PSI.
Understanding this split matters practically: delays or questions about references, experience documentation, or coursework go to the Board's division staff, while scheduling issues, calculator policy, or reference material questions go to PSI. If you're new to the entire process, the GCA-II Certification overview lays out how these two organizations interact from application to license issuance.
Exam Format and Scoring
The GCA-II exam is built around a two-part testing session:
- 100 scored questions plus 20 unscored pretest questions mixed in without identification, meaning you should treat every question as if it counts.
- 7 total hours of testing time, split into two 3.5-hour parts.
- A final scaled score of 70 is required to pass.
- The exam is open book, but only under PSI's approved-reference rules - you cannot bring arbitrary materials, only the specific titles PSI authorizes.
- A silent, non-programmable calculator is permitted for load and duct calculations.
The open-book format changes how you should prepare compared with a closed-book test. Speed with your references matters as much as raw memorization - you need to know exactly where a table or formula lives in your approved manual, not just that it exists. For a deeper breakdown of exactly what "passing" means numerically, see GCA-II Passing Score 2026: Exactly What You Need to Pass.
Key Takeaway
Because pretest questions are unscored but unidentified, never assume a question is a "throwaway." Answer everything as if it affects your scaled score of 70.
The Four Exam Domains
GCA-II content is organized into four domains, and they are not weighted equally. System Design is the dominant domain, meaning it will consume the largest share of scored questions and deserves the largest share of your study hours.
Domain 1: Regulations, Laws, and Administrative Functions
Covers Georgia licensing law, Board rules, and the administrative obligations of a licensed contractor.
- Board authority and license classifications
- Contractor obligations and recordkeeping
Domain 2: System Design
The dominant domain on the exam. Focuses on load calculation methodology and duct design for systems that exceed Class I limits.
- Manual J heating and cooling load calculations
- Manual D duct sizing procedures
- Manual N and Q commercial load and quality-installation concepts
Domain 3: Installation
Tests knowledge of correctly installing equipment, ductwork, and controls in accordance with code and manufacturer specifications.
- Equipment placement and clearances
- Ductwork and refrigerant line installation practices
Domain 4: Maintain and Repair System
Covers diagnosing and correcting problems in existing conditioned-air systems.
- Troubleshooting airflow and refrigerant issues
- Preventive maintenance procedures
For a full content breakdown with subtopics under each of these four domains, review the GCA-II Exam Domains 2026: Complete Guide to All 4 Content Areas. If you're trying to gauge overall difficulty before committing to a study timeline, How Hard Is the GCA-II Exam? Complete Difficulty Guide 2026 is worth reading early.
Eligibility to Sit for the Exam
The Board doesn't let just anyone register for the GCA-II exam. Applicants must demonstrate:
- Five years of qualifying conditioned-air experience, specifically including work on systems above the Class I limits (175,000 BTU heating / 60,000 BTU cooling).
- Three references attesting to that experience.
- EPA certification (refrigerant handling).
- Board-approved coursework in Manuals J&D and N&Q - the same load-calculation and duct-design manuals tested heavily in Domain 2.
Notice the overlap: the coursework requirement to even qualify for the exam directly maps to the exam's dominant domain. If you've already completed Manual J&D and N&Q training, you have a head start on System Design content. A full walkthrough of documentation, timelines, and how to satisfy each requirement is available in GCA-II Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Fees, Approval Window, and Renewal
The mechanics of registering and staying licensed are straightforward but time-sensitive:
| Item | Detail |
|---|---|
| Initial application fee | $110 |
| Exam approval validity | 1 year from Board approval |
| License renewal deadline | November 30 of odd-numbered years |
| Continuing education per cycle | 8 hours |
The one-year approval window means procrastination has a real cost: if you don't schedule and pass within that year, you may need to work through the Board's re-approval process again. For a complete breakdown of every dollar involved - application, exam, and renewal - see GCA-II Certification Cost 2026: Complete Pricing Breakdown. If you're trying to plan around testing windows and deadlines specifically, check GCA-II Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Who Actually Needs This License
Class II is generally pursued by conditioned-air professionals who want to bid on and legally perform work beyond Class I's BTU restrictions - larger residential retrofits, light commercial installs, and system design work that requires full Manual J/D/N/Q load calculations. Employers hiring for these roles include mechanical contracting firms, commercial HVAC installers, and design-build companies that need someone who can size and specify systems, not just install pre-designed equipment.
If you're evaluating whether the license changes your job prospects or pay, two resources go further than this overview: GCA-II Salary Guide 2026: Complete Earnings Analysis and Is the GCA-II Certification Worth It? Complete ROI Analysis 2026. For actual openings that list the license as a requirement or preference, browse GCA-II Jobs.
How to Approach Preparation
Given that System Design carries the most weight and draws on the same Manual J&D and N&Q coursework required for eligibility, the most efficient study sequence front-loads that material rather than treating all four domains equally.
System Design (Domain 2)
- Rework Manual J load calculations by hand and with your approved reference
- Practice Manual D duct sizing problems under timed conditions
- Review Manual N&Q concepts for commercial-scale scenarios
Installation and Maintain/Repair (Domains 3-4)
- Cross-reference installation clearances and code requirements
- Drill common troubleshooting scenarios for airflow and refrigerant problems
Regulations (Domain 1) and Open-Book Speed
- Memorize Board rules and administrative obligations
- Practice locating answers quickly in your approved references - speed matters in a 3.5-hour session
This sequencing isn't generic advice pasted onto any exam - it follows directly from the fact that System Design dominates scoring and shares content with your eligibility coursework. For a structured, week-by-week plan built entirely around these four domains, the GCA-II Study Guide 2026: How to Pass on Your First Attempt expands this into a full plan. A condensed reference for the final days before your test is available in the GCA-II Cheat Sheet 2026: One-Page Review of Must-Know Facts.
Running realistic practice questions under the same two-part, 3.5-hour timing structure is one of the best ways to confirm you're ready - you can start building that familiarity with timed practice sets on the main practice test site.
Key Takeaway
Study the dominant domain first: System Design overlaps with your required Manual J&D and N&Q coursework, so mastering it early pays off twice.
Frequently Asked Questions
No. Class II is the unrestricted license, removing the 175,000 BTU heating and 60,000 BTU cooling caps that apply to Class I. It has its own experience requirements, coursework, and exam.
The Georgia State Construction Industry Licensing Board's Division of Conditioned Air Contractors approves candidates, and PSI administers the actual test at approved centers.
The exam is open book, but only under PSI's approved-reference rules. You may not bring arbitrary notes or textbooks - only the specific references PSI authorizes.
Exam approval is valid for one year from the date of Board approval, so you need to schedule and sit for the test within that window.
Licenses renew by November 30 of odd-numbered years and require 8 continuing-education hours per cycle. Missing that deadline can put your active license status at risk, so track the cycle date rather than an individual anniversary.
Whether you're just starting to research the license or already have your Board application in progress, understanding the exam's structure - 100 scored questions, a dominant System Design domain, and the $110 application fee tied to a one-year approval clock - is the foundation for everything else in your prep. Start turning that structure into practice by exploring more articles on GCA-II Training or heading straight to practice questions modeled on the real exam format.