- What "ACR Requirements" Actually Means in Texas
- Age and Experience Prerequisites
- Application Steps and Fee Mechanics
- Exam Format, Rules, and Reference Materials
- Domain Coverage You Must Be Prepared For
- Requirements After You Pass: Insurance and Renewal
- 2026 Code Reference Updates
- Building a Qualification and Study Timeline
- Common Eligibility Mistakes to Avoid
- Frequently Asked Questions
- Applicants need 48 months of supervised experience in the prior 72 months, or 12 months certified plus 36 months in the prior 48.
- TDLR charges a $115 application fee; PSI charges a separate $74 exam fee for the Environmental Air Class A exam.
- The exam has 120 scored items (plus 5 non-scored), a 4-hour limit, and requires a 70% passing score.
- It's open-book: approved references can include prior notes, highlighting, and permanent tabs.
What "ACR Requirements" Actually Means in Texas
When people search "ACR requirements," they're usually asking about eligibility for the Texas Department of Licensing and Regulation (TDLR) Air Conditioning and Refrigeration Contractor License - specifically the Environmental Air Class A exam pathway, administered by PSI. This is a state contractor license tied to environmental air-conditioning work with no equipment-size limit, not a manufacturer certification or a general HVAC skills badge. If you're evaluating whether you're ready, the requirements fall into three buckets: who can apply, what the exam looks like, and what you must maintain once licensed.
Before diving into the specifics, it helps to understand how this license fits into the broader field. If you're still asking foundational questions, our companion pieces on What Is ACR? and ACR Meaning cover the terminology, while ACR Certification explains how the license functions as a credential in the Texas trade market.
Age and Experience Prerequisites
TDLR sets a straightforward age floor: applicants must be at least 18 years old. The real gatekeeping requirement is documented, supervised practical experience. You generally need one of two qualifying paths:
- Standard path: 48 months of supervised practical experience within the preceding 72 months.
- Accelerated path: 12 months as a certified technician plus 36 months of qualifying experience within the preceding 48 months.
Both paths are subject to approved substitutions, meaning certain formal training or verified employment arrangements can count toward the experience clock under TDLR's review. If your work history doesn't map cleanly onto either path, don't assume you're disqualified - get your documentation together and let TDLR evaluate it rather than guessing.
Key Takeaway
Start collecting supervisor signatures, employer letters, and dated job records now. The 48-month or 12+36-month windows are backward-looking, so gaps in documentation can push your eligibility date further out than your actual field experience would suggest.
Application Steps and Fee Mechanics
Once you meet the experience threshold, the application mechanics involve two separate payments to two separate entities:
| Item | Paid To | Amount |
|---|---|---|
| Application fee | TDLR | $115 |
| Examination fee | PSI | $74 |
These are distinct line items, so budget for both before you schedule a testing appointment. For a full breakdown of every cost involved - including renewal and continuing education - see ACR Certification Cost 2026: Complete Pricing Breakdown. If you're trying to nail down when exam windows and application deadlines line up, ACR Exam Dates 2026: Testing Windows, Deadlines & Scheduling walks through the scheduling logistics in detail.
Exam Format, Rules, and Reference Materials
The Environmental Air Class A exam is a computer-based, in-person test delivered through PSI test centers, and it's available in both English and Spanish. Understanding the format is itself a requirement - showing up without knowing the rules costs candidates time and confidence.
- Question count: 120 scored multiple-choice items plus 5 non-scored items (you won't know which is which).
- Time limit: 4 hours.
- Passing score: 70%.
- Format: Open-book. Approved references may already contain your own notes, highlighting, underlining, and permanent tabs going into the exam.
- Calculator: A compliant nonprogrammable calculator is permitted.
The open-book allowance is a genuine advantage, but only if you've prepared your references in advance rather than trying to read them cold during the test. For a deeper walkthrough of exactly what 70% translates to in scored items and how the non-scored questions factor in, read ACR Passing Score 2026: Exactly What You Need to Pass.
Domain Coverage You Must Be Prepared For
Eligibility isn't just about age and hours logged - it's also about whether your practical experience actually exposed you to the content the exam tests. PSI's official outline breaks the 120 scored items across 14 domains, and the weighting tells you where to concentrate your review.
Air Distribution - 15%
The largest single domain. Candidates must understand duct sizing, airflow balancing, and distribution system design well enough to answer scenario-based questions, not just definitions.
- Static pressure and airflow relationships
- Duct material and sizing standards
Equipment Requirements and Design - 11.67%
Second-largest domain, covering how equipment is selected, sized, and installed to code.
- Equipment sizing against load requirements
- Installation clearance and design standards
HVAC Systems - 9.17%
Broad systems-level knowledge tying together how components function as a whole rather than in isolation.
The remaining domains - Service (10%), Testing (10%), Basic Refrigeration Components (5%), Combustion Air (5%), Controls (5%), Piping (5%), Refrigeration Principles (5%), Safety (5%), Texas Laws and Rules (5%), Ventilation (5%), and Venting (4.17%) - round out the outline. Even the smaller-weighted domains, like Venting, still contribute scored items you can't afford to skip. For the complete domain-by-domain breakdown with study priorities for each, see ACR Exam Domains 2026: Complete Guide to All 14 Content Areas.
Key Takeaway
Texas Laws and Rules is only 5% of the exam, but it's the one domain that overlaps directly with continuing education requirements after licensure - study it early so it reinforces your later renewal obligations.
Requirements After You Pass: Insurance and Renewal
Passing the exam is not the finish line. Class A contractors must maintain commercial general liability coverage of $300,000 per occurrence, $600,000 aggregate, and $300,000 for products and completed operations before the license is active and usable in the field. This is a non-negotiable requirement for practicing under the license, not a suggestion.
The license itself is a one-year term, renewing for $65. Renewal requires eight hours of continuing education, including at least one hour specifically on Texas law and rules - the same domain area tested on the original exam. Building familiarity with Texas Laws and Rules now pays off twice: once on exam day and again every renewal cycle.
| Requirement | Detail |
|---|---|
| License term | 1 year |
| Renewal fee | $65 |
| Continuing education | 8 hours total, including 1 hour on Texas law and rules |
| Liability insurance | $300,000 per occurrence / $600,000 aggregate / $300,000 products-completed operations |
2026 Code Reference Updates
The PSI candidate information bulletin was updated July 9, 2026, and candidates should treat that update as the current source of truth for exam policy. Separately, 2024 editions of the IMC, IFGC, and UMC take effect as reference codes on September 1, 2026. If your exam date falls near or after that transition, confirm which code edition applies to your specific testing window - studying an outdated edition of a referenced code is one of the most preventable ways to lose points on Equipment Requirements and Design, Ventilation, and Venting questions, all of which lean on code-based reasoning.
Building a Qualification and Study Timeline
Once your experience hours and application are squared away, give yourself a structured runway before test day. The sequencing below leans on domain weight: heavier domains get earlier, longer attention, and lighter domains get consolidated review closer to the exam.
Heaviest Domains First
- Air Distribution (15%) and Equipment Requirements and Design (11.67%)
- Build your open-book reference tabs for these sections now
Systems and Applied Knowledge
- HVAC Systems (9.17%), Service (10%), Testing (10%)
Mid-Weight Technical Domains
- Basic Refrigeration Components, Combustion Air, Controls, Piping, Refrigeration Principles, Safety, Ventilation
Rules, Venting, and Full Review
- Texas Laws and Rules (5%) and Venting (4.17%)
- Full-length timed practice under the 4-hour limit
For a more detailed methodology on pacing, reference-tab strategy, and how to structure practice under the 4-hour, 120-question format, see ACR Study Guide 2026: How to Pass on Your First Attempt. You can also run full-length timed simulations on our practice test platform to get comfortable with the open-book pacing before your actual appointment.
Common Eligibility Mistakes to Avoid
- Underdocumented experience: Verbal confirmation of hours worked isn't enough - TDLR needs verifiable records tied to the 48/72 or 12+36/48 month windows.
- Paying only one fee: Candidates sometimes budget for the PSI exam fee and forget the separate TDLR application fee, or vice versa.
- Bringing unapproved references: Open-book doesn't mean "any book" - confirm your materials meet PSI's approved-reference criteria before test day.
- Ignoring the insurance requirement: Passing the exam doesn't automatically make you operational; the CGL coverage thresholds must be in place.
- Skipping smaller domains: Domains like Venting (4.17%) and Combustion Air (5%) are easy to underweight in study time relative to their actual point value.
If you're weighing whether the time and money investment is worthwhile given your career goals, Is the ACR Certification Worth It? Complete ROI Analysis 2026 and ACR Salary Guide 2026: Complete Earnings Analysis put the requirements in context against long-term outcomes. And once you're licensed, ACR Jobs covers where Texas Class A contractors typically find work.
Frequently Asked Questions
The core published prerequisites center on age (18+) and documented supervised experience. Residency and citizenship specifics should be confirmed directly with TDLR's current application instructions, as this article focuses on the experience and exam requirements.
Yes. Both experience paths - the 48-month standard path and the 12+36-month certified-technician path - are subject to approved substitutions reviewed by TDLR on a case-by-case basis.
Yes, the Environmental Air Class A exam is offered in both English and Spanish through PSI's in-person computer-based testing.
The license requires maintaining commercial general liability coverage of $300,000 per occurrence, $600,000 aggregate, and $300,000 for products and completed operations. Without it in place, you cannot legally operate under the Class A license even after passing the exam.
If your test date falls on or after September 1, 2026, the 2024 editions of the IMC, IFGC, and UMC take effect as reference standards. Always check the current PSI bulletin for your specific scheduled date.