DALT-T Pass Rate 2026: What the Data Shows

Why There Is No Official DALT-T Pass Rate

If you searched for the pass rate of the Duct Air Leakage Testing Technician exam and found a confident percentage somewhere, treat it with caution. In the materials we reviewed for the ICB Duct Air Leakage Testing Technician credential, no current official pass-rate statistic was verified. The International Certification Board (ICB) publishes its certification manual, exam structure, and eligibility rules, but not a headline pass percentage we could confirm for this specific technician exam.

That matters because the DALT-T acronym is shared by other credentials in other fields, and pass-rate figures floating around the internet are often borrowed from a different exam entirely. Everything on this page is about the ICB Duct Air Leakage Testing Technician certification and nothing else. If you need a refresher on exactly which credential this is, see What Is DALT-T Certification?

What the Published Numbers Do Tell You

Even without a pass rate, the exam's published design gives you hard facts to reason from. Here is the structure as documented in the ICB Certification Manual and the ICB exam details document:

Two things stand out. First, 2.5 hours for 40 questions is roughly 3.75 minutes per question, which is generous and signals that many items involve calculation or document interpretation rather than quick recall. Second, the open-reference allowance changes what "hard" means: the exam rewards candidates who can locate and apply information accurately, not only those who memorized it. For a deeper look at difficulty, read How Hard Is the DALT-T Exam? Complete Difficulty Guide 2026.

The Cut Score in Plain Math: 25 of 32

The passing standard is 25 correct answers out of 32 scored questions. That is a ratio you can calculate yourself: 25 divided by 32 is about 78 percent of scored items. The eight beta items do not count toward your result, but you will not know which ones they are, so you must treat all 40 questions as live.

Put differently, you can miss up to seven scored questions and still pass. That sounds forgiving until you consider how the misses cluster. Domains are weighted, and a candidate who is weak in one heavily weighted area can burn through that seven-question cushion quickly.

Who Sits the Exam and Why That Skews Any Rate

Any pass-rate figure for this exam would reflect a very particular candidate pool, which is one reason generic comparisons to other certifications mislead. Eligibility follows the technician categories in Section 3.2 of the ICB Certification Manual. These are alternative qualifying categories, and they include:

• Work that supports NEMIC contribution eligibility
• Qualifying work under a SMART collective-bargaining agreement
• Specified circumstances of temporary unemployment or disability
• Temporary employment as a sheet metal organizer

In other words, candidates are generally working in or closely connected to the sheet metal trade, and ICB approval precedes testing. Training and access to the ITI study manual are routed through the local JATC, per ICB's technician instructions. Many candidates therefore arrive having already completed structured coursework with hands-on exposure to duct systems and test equipment.

That self-selection cuts both ways. A pool of prepared, field-experienced candidates would tend to produce stronger results than an open-enrollment exam would. But it also means you cannot translate someone else's experience on a general-population exam into expectations here. Full details on who qualifies are in DALT-T Requirements 2026: Eligibility, Prerequisites & How to Qualify.

Where Points Are Won and Lost by Domain

Since the pass rate itself is unavailable, the most useful data you have is the official domain weighting. The seven weighted headings of the knowledge base are below. Percentages are the official weights; the approximate question counts are simple arithmetic applied to the 32 scored items and should be treated as rough guides, since ICB does not guarantee exact per-domain counts on any single form.

Math, Project Documents, and Considerations for DALT each carry 12%, and Preliminary DALT Procedures carries 9%. Smaller does not mean ignorable: with a seven-miss budget, a few careless losses in the lighter domains can be the difference between 25 and 24. For a complete breakdown of each area, see DALT-T Exam Domains 2026: Complete Guide to All 7 Content Areas.

Retest Waits and the Cost of a Miss

One of the clearest ways to understand how much a failed attempt costs is the retest schedule, which is documented and escalating:

• First retest: 30-day wait
• Second retest: 60-day wait
• Third and subsequent retests: 90-day wait

There is also a clock on the front end: the written examination must be completed within one year of application approval. Combine those rules and a candidate who fails repeatedly can watch months slip away. The practical lesson is that treating the first attempt as a "trial run" is expensive in calendar time even when it is cheap in dollars. We did not verify a current numerical exam fee in the retrieved materials, so confirm any cost directly with your local JATC; for what we do and do not know about pricing, see DALT-T Certification Cost 2026: Complete Pricing Breakdown.

Approved References: Preparation Over Memorization

ICB allows approved reference materials to be consulted during the exam, including on computers, tablets, or smartphones, while prohibiting communication and capture of exam content. That single rule reshapes how you should prepare.

Open-reference exams punish a specific failure mode: spending too long hunting through a reference for an answer you could have recalled in seconds, or never having learned the structure of the reference at all. With roughly 3.75 minutes available per question on average, you have time, but not unlimited time, especially on multi-step calculations.

A Domain-Ordered Prep Sequence

Because Fluid Flow underpins so much of the exam, the order in which you study matters more than the total hours. This sequence front-loads the concepts that later domains depend on.

For a fuller plan, including how to structure review around your weakest domain, use the DALT-T Study Guide 2026: How to Pass on Your First Attempt, and keep the DALT-T Cheat Sheet 2026: One-Page Review of Must-Know Facts handy in the final days. When you are ready to measure yourself against exam-style questions, the DALT-T practice tests are built around these seven domains.

What Passing Gets You, and How Long It Lasts

Passing is not the end of the credential's lifecycle. Certification is valid for two full years, counted from the last day of the quarter in which it was obtained. Renewal requires continued eligibility, an application submitted before expiration, and four acceptable ICB CEUs earned during the certification period. One training hour equals one ICB CEU, and four total acceptable CEUs renew all technician certifications you hold.

If you are weighing whether the effort pays off, the career side is covered in Is the DALT-T Certification Worth It? Complete ROI Analysis 2026. We avoid quoting salary numbers here because none were verified for this credential specifically.

Frequently Asked Questions

Dates and scheduling windows are handled locally, so check DALT-T Exam Dates 2026: Testing Windows, Deadlines & Scheduling and your JATC for current availability. Until ICB publishes a verifiable pass rate, the best strategy is to ignore the headline number entirely and prepare to the published standard: 25 of 32, with Fluid Flow and Instrumentation as your anchors. You can start building that readiness today with the practice questions at DALT-T Exam Prep.