Last Updated: Oct 13, 2026
No. of Questions: 52 Questions & Answers with Testing Engine
Download Limit: Unlimited
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| Certification Vendor: | International Code Council (ICC) |
|---|---|
| Exam Name: | Commercial Mechanical Inspector M2 Exam |
| Exam Number: | M2 |
| Real Exam Qty: | 50 |
| Exam Format: | Multiple-choice, Open-book |
| Certificate Validity Period: | 3 years |
| Related Certifications: | Commercial Plumbing Inspector Commercial Electrical Inspector Commercial Building Inspector |
| Available Languages: | English |
| Exam Price: | $219 (ICC members), $249-$320 (non-members) |
| Exam Duration: | 120 minutes |
| Passing Score: | 75 (scaled score) |
| Recommended Training: | ICC Official Training ICC Code Resources |
| Exam Registration: | Pearson VUE Scheduling ICC Official Registration |
| Sample Questions: | DOWNLOAD DEMO |
| Exam Way: | Onsite at Pearson VUE test centers; Online remote proctoring via ICC PRONTO |
| Pre Condition: | No mandatory prerequisites; recommended knowledge of International Mechanical Code (IMC) and International Fuel Gas Code (IFGC) |
| Official Syllabus URL: | https://www.iccsafe.org/certification/certification-exams/m2-commercial-mechanical-inspector/ |
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Fuel Supply Systems | 10% | - Piping testing and inspection - Fuel gas piping materials and installation - Gas appliances and connections - Pressure regulation and overpressure protection |
| Topic 2: Duct Systems | 12% | - Duct installation and supports - Dampers and access doors - Duct construction and materials - Insulation and sealing |
| Topic 3: Heating, Cooling & Water Heaters | 18% | - Water heaters and storage tanks - Solar thermal systems - HVAC equipment installation and clearance - Heat pumps and cooling equipment - Boilers and hydronic systems |
| Topic 4: Chimneys & Vents | 14% | - Chimney construction and materials - Factory-built chimneys and vents - Vent systems and connections - Clearances and termination requirements |
| Topic 5: Combustion Air | 8% | - Air supply and venting - Combustion air requirements - Confined spaces and equipment rooms |
| Topic 6: General Administration | 18% | - Code authority and enforcement - Plan review and documentation - Permits and inspections - Manufacturer's instructions and listings |
| Topic 7: Exhaust & Ventilation Systems | 20% | - Hazardous and special exhaust systems - Ventilation rates and outdoor air requirements - Makeup air systems - Commercial kitchen exhaust systems |
At present, the M2 exam's passing score is 75 (scaled score), and registration costs $219 (ICC members), $249-$320 (non-members). Since failing means registering again at full price, thorough preparation is the economical choice — and International Code Council can revise both figures, so confirm them officially before booking.
The International Code Council Commercial Mechanical Inspector blueprint is built around these main domains:
Additional domains appear in the full official outline — our bank covers them all.
Honored in writing. If you fail the corresponding exam within 60 days of purchase, send us a scanned copy of your enrollment slip and your official Score Report PDF within two days of the exam date; verified claims are refunded in full within seven days. Exclusions: exams taken within three days of purchase, candidate names that differ from the payer, and free or expired products. You may also exchange your product for two others of equal value at no charge.
International Code Council lists these official training options:
Combine structured training with engine-based practice to cover both theory and test-taking rhythm.
By a professional group with dedicated contribution — experienced engineers and educators in this industry who compile every M2 question and verify every answer across the International Code Council Commercial Mechanical Inspector objectives. Maintenance is continuous: as new technology standards and knowledge emerge, revisions follow, and each updated version is sent to your mailbox immediately, free for 365 days, with a 50% renewal discount for further partnership. Privacy is protected by principle — your information is classified and never sold or shared, so no one will call you to sell something after our cooperation. And preferential terms — bundle discounts on the three versions, irregular coupons, little gifts — thank you for your trust in return.
International Code Council publishes these prerequisites for the International Code Council Commercial Mechanical Inspector: No mandatory prerequisites; recommended knowledge of International Mechanical Code (IMC) and International Fuel Gas Code (IFGC).
Verify the current requirements on the official certification page.
Upon successful payment, our system automatically sends the product to your mailbox — typically within about a minute — with an instant download link on screen. If nothing arrives within two hours, check your spam folder and contact support. Updates are part of our long-term partnership: whenever anything changes in the M2 bank, the updated version goes to your mailbox immediately, free for 365 days, and further partnership continues at half price. Installations are unlimited throughout.
Per the latest exam information, the M2 exam contains 50 questions with 120 minutes minutes to complete them. The PC Test Engine lets you simulate a full test event under these conditions to check your progress.
Registration runs through the official channels below:
Secure your test center or online slot early — a confirmed date gives your preparation a finish line.
The minimum rise required for a 10-foot run of vent connector is _____ inches.
Correct Answer: A 🗳️
Explanation: Only visible for Exams-boost members. You can sign-up / login (it's free).
Exhaust is required for which of the following areas?
Correct Answer: B 🗳️
Explanation: Only visible for Exams-boost members. You can sign-up / login (it's free).
The optional integral clearance reduction system is designed to meet which NFPA standard?

Correct Answer: A 🗳️
Explanation: Only visible for Exams-boost members. You can sign-up / login (it's free).
What is the minimum distance required between a combustion air opening at the exterior of a building and a lot line?
Correct Answer: A 🗳️
Explanation: Only visible for Exams-boost members. You can sign-up / login (it's free).
ERV systems shall not be installed in which of the following except:
Correct Answer: D 🗳️
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