I recently completed both my G3 and G2 gas courses at HiMark in London, and I highly recommend the school—especially if you have the opportunity to be taught by Dan. Dan is an exceptional instructor who genuinely cares about his students and takes great pride in both his teaching and his professionalism as an HVAC technician. He always made sure we received accurate information. If there was ever a question he wasn’t certain about, he took the time to find the correct answer and brought it back to the class. That level of honesty and commitment speaks volumes about his character. The night classes can be challenging after a full day of work, but Dan kept the class engaged by relating the material to real-life situations in the field. His practical experience made the lessons much easier to understand and remember. What impressed me most was his dedication outside the classroom. He made himself available—even on his nights off—to answer questions and help ensure we were prepared for the TSSA exams. I can honestly say I don’t think I would have successfully completed my G3 and G2 without his guidance and support. If you have the chance to take a course with Dan, don’t pass it up. He is an outstanding instructor and a tremendous asset to HiMark Gas in London. Thank you, Dan, for everything you do.
Highlights from 45 Google reviews
I had an amazing experience taking the G3 course at Himark London. The entire learning environment was welcoming, professional, and, most importantly, fun. A huge shoutout to Mark for making every class engaging and enjoyable. His teaching style kept everyone involved and made even the challenging topics easy to understand. Another big thank you to Bob, who went above and beyond to help students find co-op opportunities. He genuinely cares about student success and is always willing to provide guidance and support. Both Mark and Bob truly go the extra mile to help their students in every way they can. I highly recommend Himark London to anyone looking to pursue their G3-G2 certification!
I just obtained my Gas-2 license after completing my studies at HiMark. They prepared me well both for the work and for the license exam. As a resident of London, after I decided to get in the field of HVAC, I compared Fanshawe College, NATS, and HiMark, as they were the only options. HiMark was the fastest route to my goals -- 5 months!. It is way more reasonable than NATS regarding cost. And, it is way more convenient than travelling to Woodstock Fanshawe campus. And their co-op approach was really useful for me to understand what was going on in the field. Highly recommended.
If you’re considering a career in HVAC and looking for a school that will set you up for success, look no further than Hi-Mark Occupational Skills Training Centre in London, Ontario. I can’t recommend this place enough—it’s hands down the best decision I made for my future, and after reading this, you’ll be signing up too! From day one, the teachers here go above and beyond to help you succeed. They don’t just teach; they invest in you like family, providing extra tutoring, encouragement, and real-world advice to ensure you grasp every concept. A special shoutout to Mark—what an incredible instructor! His classes are packed with engaging stories from years in the field that make complex topics come alive. He’s incredibly patient, always taking the time to explain things until they click, and super respectful to everyone, creating a positive, inclusive vibe that makes learning enjoyable. And let’s talk about Bob—he’s a powerhouse when it comes to co-op placements. He’s constantly hustling behind the scenes to connect students with top companies, giving you that crucial hands-on experience alternating between classroom weeks and field work. The program itself is a game-changer: you can earn your Gas Technician 3 and 2 licenses in the comprehensive 19-week course, with a massive, well-equipped lab full of real HVAC gear for practical training. Listen to your instructors, put in the effort, and you’ll ace those license exams—Hi-Mark’s pass rates are solid (around 70-75%), and they offer additional tutoring and support if needed. No other school I know of integrates co-op so seamlessly, giving you on-the-job confidence while still in training. What sets Hi-Mark apart is the overall supportive environment. With over 25 years in skilled trades education, they focus on building not just your technical know-how but your professional network and self-assurance. Graduates leave ready to thrive, and employers love hiring Hi-Mark alumni because we come out knowledgeable, eager, and prepared. I’ve heard from companies like The Boiler Guys that their experiences with Hi-Mark hires have been outstanding. Plus, the school is accredited by TSSA and registered under the Ontario Career Colleges Act, ensuring top-notch, industry-recognized training. If you want a school that’s professional, efficient, and truly cares about your success—complete with flexible options like evening classes for those working full-time—Hi-Mark is it. I walked in unsure and I will leave certified, employed, and excited about my HVAC career. Do yourself a favor and enroll today; you won’t regret it! 10/10, five stars all the way.
Thought I made a review already but, if you're into a fast paced course that cuts out all of the filler stuff this is the place to you - while the physical stuff is a bit limited they make it up by their co-op if you enroll in their GAS TECHNICIAN 3-2 (co-op) course. Awesome teachers and very friendly. especially Oscar super relaxed but fun. Would reccomend
If you're looking to get your gas license, this is the place to go!!! The instructors are very knowledgeable, and as long as you listen, and put in the effort, you should be successful.