This course is an overview of how heat pumps work and what makes them different from air conditioning. It covers piston type heat pumps and heat pumps with a thermostatic expansion valve.

Introduction to Mechanical Code is an overview of the International Mechanical Code (IMC) requirements for residential HVAC equipment installation. It focuses on plumbing, electrical and various other codes and industry standards used to properly and safely install HVAC equipment.

In this course, we’ll start off with a couple lessons that identify the various components of the appliances before we delve into the different configurations available and their actual operation. Washers and dryers may seem like simple appliances, but they actually have quite a bit going on to make sure that they function properly. This is a great course to introduce you to them and provide you with a general understanding.

This course is an introduction to cold climate heat pumps and the advances in technology made to these units. In this course, you will learn the various types of heat pumps that are used in cold climates and the requirements a unit must meet in order for installation. You’ll also learn how cold climate heat pumps differ from traditional heat pumps in regards to efficiency and cost and how balance points can impact heat pump performance.

An Air Handling Unit, or AHU, plays an important role in a commercial HVAC system. In this course, we cover the foundational information you would need to know when working with AHUs. Specifically, we will talk about what AHUs are, how they operate, and the main components. Then we will briefly go over some common problems that occur and their indicators. Last, we will go through some of the different types that you will encounter.

An electrical plan for a room or house can look like a super complicated maze of lines and symbols! So in this course, we break it all down for you. An electrical plan shows single lines for all the circuits, and symbols for receptacles, switches, different types of lights, and so on. We actually go line by line and symbol by symbol through a variety of rooms in a house – actually the same house we use for our residential wiring troubleshooting simulations. Each room is designed to include a new element, and a little more complexity, so you gradually progress through 5 different electrical plan scenarios. The circuits are deliberately designed to familiarize you with different components, like 3- and 4-way switching, standard and GFCI receptacles, and 2- and 3-wire cabling. We also take different approaches to circuit design like having switches at the start or end of a run, and operating two fixed appliances with one cable in a multi-wire branch circuit that shares a common neutral. By the end of the course, you’ll be comfortable reading complex electrical plans and will have an appreciation for the variety of ways room circuits can be designed.

A pump is a device for lifting, transferring, or moving fluids by suction or pressure from one position to another. This course covers how pumps are used to move liquid--primarily water--through hydronic HVAC systems. You will learn the basic mechanics and hydrodynamics by which a pump moves water with a focus on centrifugal impeller pumps, including the components and operation of these pumps in commercial hydronic HVAC systems.

In this course, you will learn about parallel rack refrigeration systems. These are one of the most complex types of commercial refrigeration systems. You’ll learn about the application of large-scale parallel rack systems and what makes them a good fit for the needs of supermarkets. Finally, you’ll learn more about the different components of parallel rack systems. You'll describe how they operate and interact in rack systems. This course makes use of diagrams to help you understand the dynamic operation of these systems.

The Introduction to Refrigeration Systems course takes all the physics you’ve learned so far and applies it to a simple refrigeration and air conditioning system. System diagrams and the Baseball Diamond info graphic will help internalize the core roles of each component in the system. Terminology will be introduced, in terms of pressure and temperature, as well as several real-world examples of air conditioning and refrigeration systems.

In this course, we’re going to be exploring the 2020 version of NFPA 70, National Electrical Code®. We will focus on a broad understanding of the material, so you can access and reference the codebook more easily when needed. We will cover the most impactful sections of the chapters, including grounded conductors, branch circuits, feeders, overcurrent protection, overvoltage protection, mechanical execution of work in the field, and "neat and workmanlike" installations.