1.1 Current Exam 79 Facts, References & Open-Book Rules

Why Exam 79 Logistics Matter on Test Day

International Code Council (ICC) Exam 79, Residential Energy Inspector/Plans Examiner, is a national certification that tests whether you can apply International Energy Conservation Code (IECC) residential provisions as a plans examiner and as a field inspector. The published Exam 79 outline weights General Plans and Inspection at 28 percent of the exam. That domain includes applicability, construction documents, location and design conditions, envelope and systems documentation, and general inspection tasks. Candidates who lose items on code year, open-book materials, or scoring never reach Table R402.1.3.

This chapter is independent OpenExamPrep study material covering 2021 IECC residential provisions (first printing). It is not an ICC publication and does not claim ICC review, partnership, or official approval. You still purchase the exam, select the code year in the ICC Exam Catalog, and sit a computer-based session at Pearson VUE or through ICC PRONTO (Proctored Remote Online Testing Option).

Building Envelope is 46 percent of Exam 79, Mechanical Systems 10 percent, and Alterations, Additions, and Change of Use or Occupancy 16 percent. Those later chapters supply the R-values and test numbers. This section supplies the rules of the sitting itself, because a banned binder or a 2024 book on a 2021 appointment is a zero before the first stem.

What the Catalog Lists Today

Confirm every logistics number on the live ICC Store and Exam Catalog the week you register. As of September 2026, the ICC Store listed Exam 79 at $320. Members see a discounted price after login; this guide does not quote a member figure because it is not a public list price. Older blogs still recycle $230 or $290 — do not use those figures. The Store states that exam purchases are final, are typically valid 365 days, and that you must match the exam title, code year, testing method, and the legal name on your government-issued ID. Contact ICC within 48 hours of purchase if the catalog line is wrong.

ICC's before-exam page is explicit: the Exam Development Committee (EDC) writes items from the first printing of the code book, and every item is four-option multiple-choice with one correct option. National Certification passing is a scale score set at 75. That is not the contractor/trades rule, where some titles require 70 or 75 percent correct. Do not convert Exam 79 into 'I need 38 of 50' and then argue with a scaled result of 75 after a different raw count. Scale scores are set by ICC and the EDC as the minimum needed to pass; they are not a public raw-to-scale spreadsheet.

Code Year: 2021 in This Guide, Catalog Choice on Exam Day

Candidates select the code year in the ICC Exam Catalog. 2024 listings exist. This guide teaches 2021 IECC residential provisions (first printing). If your jurisdiction or employer requires 2024, buy that catalog entry and study 2024 numbers — ceiling R-values, air-leakage limits, lighting, and additional-efficiency packages moved between editions. A tabbed 2021 first-printing book is the reference this material trains you to navigate.

Exam 79 is not ICC 77 or 78 (commercial energy), not CE (ASHRAE 90.1), not G1 (green residential), and not a sitting that lets you inspect from IRC Chapter 11 alone. The scored reference is the IECC Residential Provisions. Bring that book, not a mixed stack of IRC energy pages and commercial envelope tables.

Open-Book Rules You Can Fail Before the First Item

ICC Administrative Rules allow print reference materials that are bound (original bound book, a permitted bound volume, or stapled — not a loose stack). You may write notes in ink or highlight. Tabs must be permanently attached: if you can peel a sticky flag off without destroying the page, it is not permanent.

Not allowed: photocopies of copyrighted materials, loose papers, and printed inserts slipped into the book. PRONTO candidates use an on-screen notepad (ICC describes a Global Notepad). Pearson VUE supplies a small whiteboard and marker; that marker is only for the whiteboard — writing in your code book with the test-center marker is a disciplinary issue. Bring a battery-operated basic four-function, non-programmable calculator. Calculators that print or store formulas (construction calculators) are prohibited. Phones, recorders, and extra electronics stay out unless an accommodations file says otherwise. Magnifying glasses, eyeglasses, an architect's scale or ruler, and a foreign language/English dictionary are listed as allowed personal items; they do not replace the bound IECC.

Scenario: the commentary binder at Pearson VUE

A candidate arrives with a three-ring binder of printed ICC commentary and a pad of sticky flags. A three-ring binder can be an acceptable binding method for references you are allowed to bring. It does not legalize photocopies of copyrighted ICC commentary. The proctor can refuse the packet. The same candidate would have been fine with a purchased bound 2021 IECC, ink notes in the margins, and plastic tabs glued so that removing them tears the page.

Scenario: PRONTO with a second screen

A PRONTO tester keeps a second monitor open to an IECC PDF and a spreadsheet of R-values. Electronic devices other than the exam device are prohibited. Open-book on Exam 79 means a print IECC in the camera frame, not a second screen. The on-screen notepad is for scratch work, not for pasting a study-guide dump.

Retakes, Eligibility, and the Three-Year Card

ICC does not require education or experience to sit Exam 79. After the exam, national certification retake rules (ICC Admin Rules, pointing to CC Rules of Procedure Section 4c) are: six national-exam attempts in a six-month period, with the exam fee due each attempt. After six attempts, wait six months from the first attempt before registering again. Passing candidates generally do not retake unless they are using retesting in lieu of continuing-education renewal. Those retake counts apply to passed and not-passed attempts as stated in the admin rules — do not sit extra 'practice' catalog attempts if you already passed unless your renewal plan actually uses retesting.

Certification typically renews on a 3-year continuing-education-unit (CEU) cycle. Confirm current CEU hour totals in the live catalog; this guide does not invent an hour count.

Related Path, Not a Shortcut: ECS and G8

The IECC/HERS Compliance Specialist (ECS) combination designation requires a current Residential Energy Services Network (RESNET) Home Energy Rating System (HERS) Rater or Rating Field Inspector (RFI) and Exam 79. An active G8 Energy Code Specialist designation may substitute for Exam 79. Exam 78 plus Exam 79 does not earn ECS.

G8 Energy Code Specialist is a separate combination: Exams 77 + 78 + 79 plus G1 or GCP. Learn that sequence only so you do not confuse it with ECS. ICC's ECS FAQ notes you can later let Exam 79 lapse and still renew ECS; you cannot skip Exam 79 (or G8 in its place) when you first apply.

Using Two Hours With a Tabbed 2021 IECC

Fifty items in 120 minutes is 2.4 minutes each. Open-book is not 'look up every stem.' Before test day, permanently tab R101 scope, R103 documents, Table R402.1.3, Table R402.1.2, R402.4 air leakage, R403 ducts, and R401.2 compliance paths. Ink a one-line reminder on the R101 page: mixed buildings — each portion follows its own residential or commercial provisions. That ink note is legal; a photocopied insert of this study guide is not.

If a stem cites a number that exists only in the 2024 IECC, you are either in the wrong catalog year or misreading a 2021 table. Stay in the first printing of the year you purchased.