Do you administer the ICC exam, or do I take it separately?

You take it separately, with ICC. SI Certs is online exam prep: we teach you the code and plans and give you practice exams so you walk in ready to pass. You buy and schedule the exam in your myICC account and take it through PRONTO, online from home or the office or at a test center. When you pass, ICC issues your certification. The ICC exam fee and code books are paid separately and aren’t included in our course price.

What is the ICC M2 Commercial Mechanical Inspector exam?

The ICC M2 exam tests your knowledge of the International Mechanical Code (IMC) as applied to commercial HVAC and mechanical systems, in addition to your knowledge of the International Fuel Gas Code (IFGC). Topics include ventilation, duct systems, exhaust systems, hydronic piping, fuel gas, and equipment installation requirements, among others.

What code book do I need for the ICC M2 exam?

The exam references the International Mechanical Code (IMC) and the International Fuel Gas Code (IFGC). It is an open-book exam. SI Certs training builds your familiarity with the IMC and IFGC layouts so you can find answers quickly on exam day.

How difficult is the ICC M2 exam?

The M2 exam is moderately challenging. Candidates who practice with the code book and understand HVAC system fundamentals generally do better. SI Certs students have a 90%+ pass rate thanks to focused practice on the most commonly tested IMC and IFGC sections.

What's included in the SI Certs Commercial Mechanical course?

Your enrollment includes 40 hours of online training inclusive of visual/graphical teaching elements, audio playback throughout, targeted practice questions, expert 1-1 coaching available through the site, and a Pass-Support Guarantee, all at $449. The course is self-paced and fully online.

Can I bundle this with the other commercial inspector courses?

Yes — the ICC C5 Combination package includes Building, Mechanical, Electrical, and Plumbing courses at $1,399, saving you compared to buying each individually.

ICC Commercial Mechanical Inspector
Online Training Course

Start Learning Today $449

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✓ 90%+ Pass Rate✓ Pass-Support Guarantee✓ 1-to-1 Expert Coaching✓ Trusted by 40,000+ Inspectors

Prepares You For
M2 Commercial Mechanical Inspector through ICC (International Code Council)
Prerequisites
None
Requirements
None
Course Length
40 Hours Online Training
Required References
View Required References
Relevant Industries
All Commercial Construction
Public/Private Projects
County/City Building Departments
Code Inspection

Preferred

Education

Provider

Commercial Mechanical

40 Hours

4.0 CEUs/PDHs

How certification works

SI Certs prepares you. ICC gives the exam and issues the certification.

Prepare with SI Certs
Our online, self-paced course teaches you what the exam covers, with practice exams and 1-to-1 coaching.
Book your exam with ICC
Buy and schedule it in your myICC account, then take it online through PRONTO from home or the office, or at a test center.
How to pay for and schedule your ICC exam (opens in a new tab)
ICC certifies you
Pass the exam and ICC issues your certification.

The ICC exam fee and code books are paid separately and aren’t included in our course price.

Personal Coaching

Phil Jankovich, PhD, PE

Commercial Mechanical Course Developer

I created this commercial mechanical course to demystify HVAC and mechanical code inspection. With my engineering background, I break complex systems down into clear, test-ready concepts.
Whether you're new to mechanical inspection or building on existing experience, this course meets you where you are and gets you exam-ready.
I'm here as your personal coach. Check out some real conversations with my students to see how I help break down challenging material.

Real Coaching Conversations

Here's what 1-to-1 coaching looks like with our students

Type B double-wall connector

correct me if I'm wrong, because I misunderstand the statement of "reduced 10% for each ADDITIONAL multiple of the length allowed by table 505.3.2"

If the connector horizontal length is 22.5 feet so the answer is 20 percent If the connector horizontal length is 30 feet so the answer is 30 percent If the connector horizontal length is 37.5 feet so the answer is 40 percent

The question is: "A 5-inch diameter type B double-wall connector is used to connect a Category I appliance to a chimney with multiple appliances connected. How much does the maximum capacity of the vent connector have to be reduced if the connector horizontal length is 15 feet?"

Answer 1: 10 percent Answer 2: 20 percent Answer 3: 30 percent Answer 4: 40 percent

The correct answer is: Answer 1.

My answer was: Answer 2.

Table 504.3.2 already allows for the length listed. For a 5-inch diameter, the maximum horizontal length of a connector is 7.5 feet WITHOUT any reductions. If you exceed the lengths listed in Table 504.3.2, you must reduce the capacity by 10% for each ADDITIONAL length. In the question, the length is 7.5 feet, so your example of 22.5 feet leading to 20 percent reduction, 30 feet is 30%, 37.5 feet to 40%, is correct.

thanks

Opening for largest appliance

One question regarding practice test 2 question 22, why the answer is not B: 22" w and 30" tall?

Or D?

The opening has to be large enough for the largest appliance to be removed. A 22" opening will not allow a 24" diameter hot water heater to get through (unless the water heater is less than 22" tall, I guess, but that would be very unusual). Both appliances could be maneuvered through a 24" x 30" opening. Answer D would be easier, giving you more space to remove the appliances, but C is the minimum.

But how can that furnace to be removed with 24"x30"?

the H is 45"

Both the water heater and the furnace would have to be turned on their sides if the access door is in a wall. If the access door is a ceiling panel, then both appliances could be lowered through the opening.

thx

Airflow for supply diffuser S3 to be balanced

question where do you find the path to the answer it's not listed for balance calculation

The question is: "Using the drawing above, to what airflow should supply diffuser S3 be balanced?"

Answer 1: a. 50 cfm Answer 2: b. 660 cfm Answer 3: c. 835 cfm Answer 4: d. 1250 cfm

The correct answer is: Answer 2.

My answer was: Answer 3.

This question requires some inference, but it is just an example of reading drawings. The image is a snip from a real drawing for a real project. It isn't stated that the CFM is above the tag, but you have to infer from the question that the CFM is listed. So, all you do is find S3 on the drawing, and you'll see the number 660 above the tag. Therefore, you pick answer 2.

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Full Course Includes

Training Hours

40 Hours

CEU / PDH

4.0 Units

120 Day Course Access

Visual Online Curriculum

Flashcard Review System

Personal Coaching & Pass-Support Guarantee

Targeted Quizzes & Practice Tests

Insightful Audio Instruction

Photos, Graphics, & Illustrations

Study anywhere — works on all your devices

User Reviews

“

Passed B2, M2, and Also CA's Exams

Good afternoon Chris, thanks for the extra time for that, passed the exam. The questions were right in line with the training received and the practice exams. Passed Commercial Building, and now also Commercial Mechanical. Even though your M2 course was geared towards the international code, I took the CA commercial mechanical exam and passed.

In the practice exams due to CA having some minor changes, answers are slightly different, however the process of reviewing and looking up the answers remains the same. Since you could not just go straight to the sections detailed in the course, it took a bit more referencing the index. On your final practice exam I scored a 40%, however looked up each answer so felt most of that score was more of a reflection of the differences in code. Turned around the next morning and took the CA exam and was done in 90 mins.

John A.

Rocklin, CA

“

Passed both M2 and M3 Exams with Course!

I actually met the two of you (Gabe & Chris) at the EduCode conference in Vegas! I didn't have my business card on me at the time but I work for a building dept. in Delaware. You guys helped me get all of the plumbing certs and now the mechanical certs that ICC offers. I'll be going for electrical next. I'm really glad you guys offer this training, it's hard to come by!

Btw, your practice tests were harder than the ICC mechanical inspector test I took, and about the same level difficulty as the plans examiner test, just to let you know.

I passed the commercial mechanical inspector and plans examiner tests btw, thanks to your program here!

Corey S.

Washington, DC

“

Questions on the exam were similar to the practice tests

Hi Gabe,

I took the International Mechanical Code M2 test this morning and passed!! I am so grateful to you and your company. Your modules were broken down to an understandable level. I really appreciate you giving me extra days to study!! I am still using it to check what answers I might have chosen incorrectly. There were questions on the exam that were very similar to the quiz and Practice tests in the course. Many questions on the two practice tests at the end were much harder than the actual exam, which I believe was a great help.

Three guys from my class for Plumbing Inspector are taking your course for IMC Commercial M2 now. They failed the Exam the first time because they had used a different company. One guy said nothing in the course was on his exam. Funny thing is, "everything" on the exam was taught by you! You actually taught a lot more data and really useful information that will definitely be of use in the future. Sorry for the long email. Can't tell you how happy I am today because of you!!

Patrick D.

Chatham, NJ

“

It's Done!

Phil, I passed!! Thank you so much for your course!!! and your time and help!!!

Yanli W.

Roslyn, NY

“

Passed the M2 Exam!

Today I passed the exam, thanks so much for everything!

Mohammad R.

New York, NY

“

Passed Plans Examiner Too!

I passed the Mechanical Plans Examiner and Commercial Building Inspector tests using your study material. We will see with the plumbing!

Nicole T.

York, SC

See all reviews →

Pricing Options

COMMERCIAL MECHANICAL

120-Day Access

40 Hours

$449

Enroll Now

Best Value

ICC COMMERCIAL COMBINATION INSPECTOR

Commercial Building
Commercial Mechanical
Commercial Electrical
Commercial Plumbing

120-Day Access Per Course · 185 Hours

$1,399

4 courses · $350 per courseSave $397 vs buying separatelyPackage details

Enroll Now

*Our course does not include the required books. You can purchase the books directly from ICC, or from Amazon or eBay.

Bundles: fixed set, lowest price. Credits: any courses, any time.

Need a different mix? Any 4 courses for $1,499 with credits. See credit pricing →

Secure CheckoutFlexible PaymentsPass-Support Guarantee90%+ Pass Rate

Required References

You'll need the following references for your exam. The test is open-book — purchase your references early so you can study with them.

IMC (2021)

International Mechanical Code

Purchase Reference →

IMC Turbo Tabs

International Mechanical Code Turbo Tabs

Purchase Reference →

IFGC (2021)

International Fuel Gas Code & Tab Combo

Purchase Reference →

References are not included with the course. Purchase from the links above, Amazon, or eBay.

Course Breakdown

Commercial Mechanical Inspection Code Test

40 hours of training | 120 days access

Course Features

IMC & IFGC Scope & Navigation
Water Heaters & Boilers
Ventilation & Exhaust Systems
Duct Construction, Dampers
Fuel Burning Systems
Venting, Connections, & Compliance
Heating Appliances
Fuel Gas Piping System & Connections
Test-Taking Preparation
Simulated Timed Tests

Topics

Mechanical Terminology
Heating, Cooling, Refrigeration
Exhaust & Ventilation
Ducts & Plenums
Combustion Air
Chimneys & Vents
Hydronic Piping
Fuel Supply
PRONTO Testing
Testing Strategies

Study Tip

The test is a single, multiple-choice test. The ICC exam code is M2 and the test covers the International Mechanical Code and the International Fuel Gas Code. You will have 2 hours to complete 50 code questions. The test is open-book.

Frequently Asked Questions

Ready to Pass Your Exam?

Join 40,000+ inspectors who prepare with SI Certs

Start Learning Today $449

✓ 90%+ Pass Rate✓ Pass-Support Guarantee✓ 1-to-1 Expert Coaching✓ Trusted by 40,000+ Inspectors

ICC Commercial Mechanical

✓ 90%+ Pass Rate✓ Pass-Support Guarantee

Start Learning Today$449

ICC Commercial Mechanical Inspector Online Training Course

How certification works

Prepare with SI Certs

Book your exam with ICC

ICC certifies you

Personal Coaching

Real Coaching Conversations

Full Course Includes

User Reviews

Pricing Options

COMMERCIAL MECHANICAL

ICC COMMERCIAL COMBINATION INSPECTOR

Required References

Course Breakdown

Commercial Mechanical Inspection Code Test

Course Features

Topics

Frequently Asked Questions

Ready to Pass Your Exam?

ICC Commercial Mechanical Inspector
Online Training Course