Reviews

I’ve been in the engineering profession for about 35 years, and finally decided to take the PE Mechanical: HVAC and Refrigeration Exam. I passed on my first attempt.

Initially, I reviewed many prep courses, and also considered just studying on my own for the exam. After reviewing all the options, I chose to go with the Mechanical PE Exam Prep - Full Access course. This course is written and kept updated by Dan Molloy, a PE, and who happens to be a very good instructor.

This course is set up to provide video instruction review of fundamentals as well as many PE Exam style questions and solutions. The solutions are provided with dedicated videos, and a physical soft backed workbook which contains all the problems with full solutions. The course is broken down into sections such as Thermodynamics, Fluid Dynamics, Heat Transfer, Psychometrics, HVAC, and general topics such as Engineering Econ, HDD energy problems… etc. These questions are definitely challenging and will prepare you for the exam.

Every two weeks, Dan holds a one hour zoom / teams type “Office Hours” session. Prior to the meeting, students are encouraged to submit questions that have come up during their studies such as general questions, or specific questions for individual work problems. There is also an archive of past office hours sessions as well as a searchable index to find all the instances that questions have come up for any specific problem. It’s helpful to see how other people have the same hang-ups on a specific problem. I also sent Dan many emails during my study time and he would respond quickly to my questions.

Some of the advantages of using Mechanical PE Exam Prep include:

Structured course with many questions and solutions. All information is both on-line, but also found in a bound course book which was sent to me.

Questions are generally more difficult than found on the PE Exam - which prepares you very well. The questions are challenging and definitely show where your weaknesses are - even if you didn’t think you had them in a particular area.

Two full-length 80 question practice exams. I also purchased the NCEES practice exam, but found the exams written by Dan to be better than the NCEES practice exam.

Office Hours live sessions, and quick response email responses.

Dan has many additional YouTube videos. You can preview these and see the teaching style, which I found to be super helpful.

It should also be noted that prior to purchasing this course, I purchased the Mechanical Engineering Reference Manual (MERM), and its associated work book. I found the reference book to be good, but the workbook seemed to be outdated and not matching the new computer based PE Exam format, which was definitely not helpful.

I highly recommend this course. Although I am in this related industry, I do not believe I would have passed the Exam the first time without the dedicated and detailed guidance I received from the problem types and all of the resources connected to this course.

Dan takes the guess work out of what study material you need to learn. Plan on putting in the hours to learn though his program and you will feel confident through every exam question you receive. Thank you Dan!

It has been 13 years since I graduate college with my BS in Mechanical Engineering. It's safe to say I forgot a lot of necessary information needed to pass the PE exam. Mechanical PE Exam Prep cut through a bunch of noise and provided concise study information that got me equipped to pass the test in 4 months. The practice problems really helped me to prepare and find holes in my thinking I did not know were present. The only outside material I used was the practice exam provided by NCEES. Everything else was from Mechanical PE Exam prep and I passed the test on my first try. Dan was a pleasure to work with and really went out of his way to help when I did not understand a concept or a problem's solution. His attentiveness was a big part in my success.
One huge help was the study program focused on helping you get familiar navigating the reference handbook, which was daunting at first but became second nature during the study process. More than once that familiarity helped me on the actual exam find the answer I needed.

Being able to learn on my own time instead of having a set classroom time was a godsend. I would recommend this course to anyone looking to seriously prep for the PE in self guide problem heavy learning.

Dan's PE prep course was excellent. It is well organized and he is extremely responsive. Great program and I would recommend it to anyone who wants to pass the PE exam on the first try!

Great course. Helps you break concepts down. Makes the exam straightforward.

Greetings, I’m from Puerto Rico.

I took the PE exam twice, and I can confidently say that Dan Molloy completely transformed the way I studied and prepared for this exam.

I first took the exam on August 3, 2021, and did not pass. I took it again in February 2022, and this time I successfully passed.

The first time, I felt lost and unsure of what to expect, which is very common. However, after receiving my NCEES diagnostic report and working with Dan, my confidence and overall approach changed significantly.

His methodology helped me understand the exam from a strategic perspective, and his procedure for solving problems is truly bulletproof. That clear and structured approach makes all the difference when facing the exam.

I highly recommend him — it is absolutely worth it.

He deserves more than a 5 star. Even though I did not purchase his program, I reached out to him multiple times and he was very helpful. I watched so many of his YouTube videos and nobody explains the concepts better than him. He dives in deep enough without giving unnecessary information that can confuse alot of people. If I had failed my exam. I wouldn’t have had a problem purchasing his full course! I think he’s the best choice for hvac and MDM.

Dan's review course helped me pass my PE, I took Thermal & Fluid systems. Dan organized all topics nicely, from Thermo to Energy &Power, explained solutions, practice exams step by step. That saved a lot of time, balanced work, life, study. I could study at my own pace, Q&A sessions office hours helped me as well. Finding Key Search terms, Key Formulas also helped me get familiarized with the reference book. Thank you Dan

Dan’s course is by far the best option for Mechanical PE prep! His course takes out all the guess work for how to prepare for such a big test. Video solutions for every problem, one on ones with Dan himself, and his positive attitude were all great things that helped me along the way. Pass the PE first try after completing this course!

I used the full access bundle to pass the PE exam. Having a study plan all set up and ready to follow was the only thing that kept me on track to pass the first time. The other thing that was a huge help with the full access bundle was the office hours with Dan, I was unsure at first, but talking with him about where I was at, really helped give me the confidence to book the test and know I was ready. Combining the included practice tests with a practice test from the NCEES gave me a well-rounded glimpse at the actual test. I was concerned I didn’t pass because the actual test seemed too easy. Just commit, buy the full access, put the time in, and it will all be behind you.

Dan’s course was exactly what I needed to get over the hump and pass the Mechanical TFS PE exam. I took a different prep course previously and didn’t pass, but Dan’s teaching style and clear explanations made all the difference. I couldn’t have made a better decision. I just found out I passed last week!

After using the Mechanical PE Exam Book (HVAC & Refrigeration) as my primary study material, I passed the PE Exam on my first try! I did every problem in the book at least twice, and because of that, I finished with an hour to spare!

Dan Molloy’s PE mechanical exam preparation course is highly recommended for anyone serious about passing the PE exam. With its comprehensive content coverage, clear lectures, extensive practice problems, interactive learning environment, experienced instructor, and proven track record of success, this course equips students with the knowledge and skills needed to ace the exam with confidence. Thanks Dan 🙏

What was the single biggest benefit of using the Full Access Bundle?

The fundamentals portion and the daily insights were the most beneficial for me. Although Dan lightly requests only watching the videos, I took a note or two on each one (rule of thumb formulae, typical problem conditions, typical unit conversions, etc.) and kept them all in one document. I referred back to this document constantly during practice problems in the modules. When it was time for practice exams, these concepts were second nature and really expedited solving problems correctly.

What sets Mechanical PE Exam Prep apart from other test prep programs?

My first attempt, I participated in a different prep course, and I didn't sense a lot of consistency in the material and approach. The other platform had 7 different trainers who seemed to all have their own experience/ideas about the exam prep. I'm not saying there is anything wrong with that, but for me personally, one voice and a consistent method of solving the problems and order of operations helped me greatly.

If someone is on the fence about choosing the Full Access Bundle, what would you say to them?

I'd say that I was enrolled in the Full Access Bundle on the 13 week track and I passed my PE exam because of it. Quite simple!
Thank you again Dan!

The fundamentals section of the course is brief but well structured and directly address the main concepts related to the exam from the various knowledge areas such as thermodynamics, fluids, heat transfer...etc. No jargon, just pure substance. This section does not cover pure math and rightly so.
The practice problems section of the course is quite challenging - sometimes frustrating. It covers a wide range of concepts and insightful/interrelated questions. The solutions offered are well detailed but need to check the video solutions as well as sometimes the book solutions are not updated and may create confusion when collecting data and solving the problems from the book.
The daily insights , office hours and podcast are quite valuable and in between them they offer offer real-life experience from exam takers as well as impeccable daily insight and tailored guidance in office hours.
All in all the course is worth every penny.

I can’t recommend Dan Molloy’s Full Access Bundle enough. After struggling with the exam twice, I finally passed on my third attempt using his material. The biggest benefit for me was the structure—everything was broken down in a clear, logical way that made even the most complex topics manageable.

What sets Mechanical PE Exam Prep apart is the combination of depth and simplicity. Dan doesn’t just throw formulas at you—he explains the “why” behind them, which gave me the confidence to tackle unfamiliar problems on exam day. The practice problems were spot-on in style and difficulty, and the video walkthroughs helped cement my understanding.

If you’re on the fence, I’d say this: don’t waste time piecing together resources from all over. I tried that before and it left me scattered and unprepared. Dan’s bundle gave me focus, clarity, and the tools I needed to finally pass.

I recently passed the Mechanical HVAC/R PE Exam, thanks to Dan Molloy’s Full Access Bundle. The program’s structured approach, with comprehensive practice problems and detailed video solutions, significantly boosted my confidence and deepened my understanding of HVAC and Refrigeration concepts. What sets this bundle apart is Dan’s personalized support—responsive Q&A and monthly check-ins—paired with exam-focused content tailored to the NCEES handbook. If you’re on the fence, I highly recommend investing in this bundle. Its clear, engaging materials and Dan’s direct guidance will thoroughly prepare you to pass the PE exam on your first attempt.

Dan's review course for the HVAC/R PE exam was indispensable for me. I had a relatively short time frame to study with two little kids at home and one more on the way. The course was focused and very efficient for me to review the necessary material and feel confident going into the exam that I was adequately prepared. I passed the exam on the first try and now I can move on with my career having achieved this milestone.

I also appreciated the personal touch that Dan has on his course. He created the course, he still runs it, and makes himself available for questions. Its not a big corporation where you are just a number, Dan genuinely cares about his students and their success.

I took this course to prepare for the PE exam, and I’m happy to say I passed! The instructor’s teaching style made a big difference — he explained typical problems clearly through video walkthroughs, showed exactly where to find formulas in the NCEES reference manual, and covered a wide range of topics including fluid dynamics, thermodynamics, HVAC, and more.

What stood out most was how practical and focused the instruction was. It helped me build both understanding and confidence. If you’re looking for a structured, well-explained PE prep course, I definitely recommend this one.

This course is excellent at distilling the big ticket items for PE study and keeping your prep time well allocated. The introductory content is great and Dan is not just a smart guy, he's an excellent teacher that knows how to distill concepts clearly and concisely. The practice problems begin simply and then slowly compound additional concepts until you're cranking out very challenging problems. The video call checkins with Dan are very helpful for asking any random questions and more importantly, tracking your overall progress--I always left these calls feeling very hopeful and focused on my progress.

Dan's video solutions on every single problem were instrumental in helping me pass the PE exam. They truly helped me develop a deep understanding of the material and gave me the confidence to roadmap and solve problems effectively, even under pressure and with some challenging problems.

Dan's course not only sharpened my technical skills but also helped build my confidence throughout the entire process. His office hours were incredibly helpful!

I used the full access bundle to study for my HVAC and Refrigeration PE Exam and passed. The practice problems with video solutions were super helpful!

Dan Molloy's HVAC course came as a blessing in my life. From start to finish, the material was well-structured, engaging, and incredibly supportive. Dan broke down complex topics into clear, manageable lessons that made learning not only effective but actually enjoyable and made me think like an engineer. This course gave me the tools, strategies, and understanding I needed to succeed, and I couldn’t be more grateful.

If you're considering taking this course—do it. It’s worth every minute and every penny. It's a one time investment for your career and you will be able to covered that cost in a single shot once you get your PE. Thank you again for creating such a powerful and supportive learning experience!

Dan at Mechanical PE Exam Prep has put an awesome prep course together that is perfect for those whose life circumstances (family, work, etc) require a self-paced program. My career took me away from HVAC, heat transfer, thermodynamics, and fluid mechanics content for a long period of time, so I was revisiting it for the first time in 14 years. I was able to study for 7-12 hours a week for 4 months and pass the Mechanical HVAC PE exam on my first try, thanks to the Mechanical PE Exam Prep course. I really appreciate how approachable Dan was throughout my entire study process, something that was missing from the other programs I was considering. I would highly recommend this course to anyone, regardless of what level of understanding you are starting from, and regardless of how aggressive your study/exam timeline is. Thanks again, Dan!

Dan Molloy has put together a phenomenal PE studying course, focusing on practice problems and retaining material knowledge. I highly recommend this course for anyone taking on the task of passing their PE exam on the first try!

I found the YouTube videos very helpful when studying for my exam. Dan does a great job using test like problems and explaining how to solve them in a way that translates exactly how NCEES wants you to work through. I would strongly recommend watching his videos as you prepare. I did not purchase any of his materials, but had I not passed my exam, it would have been something I would have considered.

Dan Molloy's course is really good and it helped me understanding the basics

There are too many good thing about this course, firstly I never took a course like this, I tried by my own means, like buying books, and studying whenever I could, it makes it difficult because been away from school for a while, I had a lot of questions and it will take more time studying by myself, which is one of the biggest advantages of this course, time saving. Every topic is well explained step by step, saving hours of study. A lot of good problems touching every topic of the PE exam. Office hours, which is amazing, ask questions even from outside sources, fast response from the Professor (Dan), who is very patient. I will totally recommend this course to anyone who wants to pass the PE, you will save hundreds of hours and, maybe hundreds of dollars in books and exam attempts. I am very happy and proud to have passed the exam and all thanks to Dan's course, which helped me better prepare. Forgive my English if I made any grammar mistakes. Thanks for everything Dan

Thanks a lot, Dan. The course helped me to pass the PE exam. The fundamentals are explained in detail with examples of practical application. The practice problems help you prepare for the exam. Would highly recommend the course to people (freshers or repeaters) working towards their PE certification.

I tried several different programs for both FE and the PE (Mechanical) study prep. I will say this with all honesty, Mechanical PE Exam Prep is one of the best out there. The questions are very close to the type you will see on the exams. In most cases they are a bit harder, and will prepare you well. There are video answers for every question, so you will get more context in the answers. Dan Molloy is also one of the most accessible experts, and is always there to provide guidance, or more context if needed. Do yourself a favor and look into Mechanical PE Exam Prep. You will not be disappointed.

A few days ago I got the good news that I passed the PE Mechanical: HVAC and Refrigeration exam.

It was a long road of study and sacrifice but I firmly believe that without the help of the program offered by Eng. Dan Molloy: HVAC & Refrigeration Full Access Bundle I would not have made it.

I analyzed other programs that offered support and help online, but I saw Dan's videos on youtube and I was convinced because of the clear and effective way to explain the problems and I did not regret it.

The program has more than 300 exercises that are explained step by step by Dan who is an excellent teacher and guide. Therefore the program helps you to improve your knowledge, build confidence and prepares you for the exam.

To those who are still looking for a program on the internet to help you prepare for the PE exams, I recommend 100% the programs that Dan Molloy has, they are a success and you will not regret it!

Dan provides exceptional content that was instrumental in helping me study and build a solid foundation in many PE topics. His resources were invaluable, I couldn’t have done it without them.

The content, videos, archived Q&A, and live Q&A were all helpful. I took two of the paper versions of the test using one study program and failed both times. I tried another study program and failed the next two computer based tests. I stumbled upon Mech PE Prep by accident (thankfully) and passed on my 5th time. If this program helped me finally pass the exam it can help anyone. I never thought I would pass it, I just wish I would have found this program sooner.

It was a well-designed course. The main practice problems in each module were slightly challenging than what came on the exam, but they were helpful in revising the concepts and making you ready for worst case scenario. Practice exam given by Dan was also really helpful and was much closer to the real exam in difficulty level. All in all, I really enjoyed Dan's course. Being able to communicate with him in office hours if I had any issues while solving different problems was a huge bonus.

In my opinion, this course is rich with valuable problems and answers. After completing it, I felt confident enough to take the exam. I took it and passed! Thank you, Dan!

Dan's Mechanical PE Exam Prep was extremely helpful on my journey to pass my PE exam. Dan always encouraging critical thinking, provided explanation, and simplified solutions for engineering problems.

Passed PE with Dan Molloy- Full Bundle. Definitely better than Engineering Pro Guides (too generic) and PPI (too complex)- failed using those courses. I need a better teacher and program. This course is way better structured, more interpersonal, more in-depth, and specifically dedicated to HVAC PE versus the other programs. It’s not only allowing you to be pass the exam but to develop better habits.

This course was super helpful in my studying for the PE exam. Dan provides you with loads of practice problems with detailed video solutions and he's very easy to contact with any questions including his biweekly office hours. I went into studying needing some structure and a game plan, and this course was exactly what I needed

I used the PPI2Pass previously and it did not work for me, so I tried Dan's program. I had the knowledge and understanding, but my biggest hurdles were test-taking confidence and time management. I contribute my passing success to Dan's explanations and how far into the details he went regarding the concepts and especially his mental approach to each problem.

Plus, his model of paying once and using the resource material for as long as it takes really took the pressure off. Don't waste your money on the other programs. Dan Molloy really has an amazing program!

I cannot speak highly enough for the quality of instruction and value provided in the Mechanical PE Exam Prep. My experience as a mechanical engineer is primarily as a project manager, meaning I have little experience with hands-on design or the need to engineer anything. This gap in knowledge was made extremely obvious once I started studying for the exam. Fortunately, Dan's instruction and step-by-step tutorials/videos helped me fill these gaps and successfully pass the exam.
Another huge benefit is lifetime access. During the middle of my prep, my family suffered a tragic loss, and I was forced to take a few months off from studying. Fortunately, I was able to dig back in once I was ready.

This was a super helpful program to help me pass the HVAC PE. I studied for about 4 months, the month and a half leading up to the exam I really turned up the heat.

I went through all of the practice problems and then took practice test. Reworked the practice in the sections I didn’t do to hot on the practice exam. Took the NCEES exam and then the second practice exam.

I only used this and the and one of the NCEES practice tests and felt pretty good coming out of the exam. I passed the exam on the first try.

The only con I have for the program was I wish there was data after the practice exams. For example on my first practice exam I got like a 52% I wish there would have been a clear breakdown of how I did per type of question. However, that is pretty minimal gripe.

Where this course really shines is getting you able to navigate the reference manual. That is probably the most important part when taking the PE. If the PE is required for you job, this is a solid course for getting you ready.

11/10, couldn't have had a better prep course/teacher. Dan truly goes above and beyond with this course. I would strongly recommend his course to anyone taking a Mechanical PE exam. Dan did a great job supporting me as I prepared for the HVAC PE exam. His course game me so much confidence when it finally came to exam day.

Can't say enough about this program! There isn't anything else out there that can compete with this one. Dan's program helped get me over the top after 3 previous failed attempts. Now I am a Licensed PE and am ready to take my career to the next level! It's worth every penny you will spend I promise!

There is simply not a better exam prep option out there. I took the HVAC and Refrigeration exam and passed it on the first try, with confidence, thanks to Dan's course. There are two things I find especially unique about the way Dan's course prepares you better than others. First, Dan has incredibly detailed, written out, and narrated solution to all of his problems. He explains them like a human being, and gives you real world examples of how to think about concepts. This video narration also makes it easy to start a solution, get a hint, then pause it and solve the problem on your own. This technique was incredibly useful to me. Second, Dan makes himself available as if he's your actual professor! I shared numerous email back-and-forth with Dan where he answered all my questions and gave great advice. His office hours are crucial as well. There's nothing worse than getting stuck on a problem outside of Dan's course and not knowing where to look for an explanation of why it isn't making sense to you.
I can't recommend this course enough for anyone trying to pass the exam!

Dan’s course offers a great variety of exam-like as well as challenging practice questions, with in depth solution videos without skipping any steps. Completing this course prepares you to answer exam problems with ease like muscle memory. This course was instrumental to my success in passing on the first attempt.

Great program that is highly digestible. Dan is truly an amazing instructor, he breaks down complicated concepts in organized by test specification topics videos. I found solving the practice problems on my own and then going back to watch his solutions videos the most useful. If I was unclear on something, having access to Dan through the office hours added a lot of value beyond just "getting the right answer". The full access package was well worth the value.

Dan's program not only provided me the tools to study efficienty and pass the test on the first try, it also gave me invaluable insights on how to practice as a professional engineer. His teaching style is better than most of my previous college professors. His reasoning is clear, concise, and practical. The program interface is easy to use and navigate. I am very glad I underwent the study process with Dan, and recommend other prospective PE candidates do the same.

This Exam prep course was a key resource for my success passing the PE exam in the first try. The way Dan explain everything is easy to understand and to relate, which helps you to remember it every time you encounter a similar situation. Another amazing resource is his companionship during the process with his one-on-one sessions and the office hours. Those two resources where also very important for me. I really recommend you to take this course if you are taking either Thermo-Fluids or HVAC Mechanical exams…it is worth every penny.

Great course layout that is focused on passing the PE which is question-heavy. I liked this methodology as the more you solve, the easier it gets.
• There are great solutions that allowed me to learn exactly how to attack and solve the questions.
• I went through the entire course and answered all the section questions.
• It took me about 4 months to cover all the material while working and raising a family.
• Each person can tailor this, but I would spend about 1-3 hours chipping away at problem sets a night and longer study sessions on the weekends.