FEATURED TESTIMONIAL – I took the HVAC & Refrigeration exam and I PASSED!!!!
“I took the HVAC & Refrigeration exam and I PASSED!!!! Your step-by-step course really did make all the difference! This was my third attempt at taking this thing. The first time I took an in-person study course, a lot of theory, not great with the problem practice. The second time I tried to study on […]
Attention HVAC Engineers! DTC Has the Best Course for PE Exam Prep
WATCH OUR VIDEO! If you’re looking for your best chance to pass the HVAC & Refrigeration Mechanical PE Exam, Dr. Tom’s Classroom offers a comprehensive online prep course for the HVAC & Refrigeration PE Exam, specifically developed for the CBT format exam. Our HVAC course applies the successful Dr. Tom Method for CBT to the […]
Keeping a Smile on the Mona Lisa in Summer’s Heat
The Louvre Museum and all of Paris have experienced one of the hottest summers in memory. Yet, what’s keeping the Mona Lisa and the millions of visitors cool and comfortable is not immediately obvious. A joint venture company named Fraicheur de Paris [literally – “freshness of Paris”] and jointly owned by EDF (France’s largest energy […]
A Battery That Never Goes Dead
The most troublesome problem with wind or solar power systems is the weather. For the energy these systems create there needs to be a way to store the excess energy and then be able to deliver that excess energy precisely when it is needed. One innovative way to store this energy is to use what […]
DTC Is Exactly What You Need to Pass the PE
We know you’re crazy busy juggling work and family AND your PE Exam preparation. That’s why all DTC courses are tailor-made to give you maximum flexibility to fit your review into your already hectic schedule, giving you just what you need to pass. It’s not only the best prep for the Mechanical PE Exams, it’s […]
Emergency Freshwater from Seawater
After making emergency medical assistance available, probably the most critical thing needed after a disaster, especially hurricanes, is water. It is normally brought into the disaster area in water bottles on pallets. To address other possibilities, the U.S. Department of Energy sponsored a three year competition called “Waves to Water” with the expressed goal of […]
Whirligig Wonders
A farm machinery repairman, Vollis Simpson, created the magical, mechanical creations that became North Carolina’s official folk art. Known as “whirligigs,” the huge kinetic sculptures have been installed around the United States, but the largest collection is near the family farm in Wilson, North Carolina. Other installations include the American Visionary Art Museum in Baltimore and the […]
FEATURED TESTIMONIAL – “Great Course That Keeps You Engaged”
“I took Dr. Tom’s thermal/fluids PE prep course. Dr. Tom presents the prep course material personally. Starting from the first lesson, it’s obvious that Dr. Tom is a man that is extremely passionate about teaching. If you are serious about taking a PE and not wasting your time, I would recommend Dr. Tom’s Classroom. I […]
A New Way to Build and Insulate with Wood
Several scientists at the Nanjing Forestry University in China, as reported by the American Chemical Society’s Nano Letters publication, have created a new insulation material made of wood. The scientists connected nanocrystals of wood cellulose with silanes (silicon compounds) to create an aerogel foam that has a visible light reflectance of 96% and an emittance […]
Try DTC Courses Before You Buy for $50
With our Test Drive and Pay-As-You-Go options, you can try out our courses for only $50 before you buy the full course. We’re so sure you’ll like what you see that there’s no obligation beyond your initial purchase. “Just finished the intro and it was great! I was skeptical about subscribing to anything and was […]
