IGSHPA Certified GeoExchange Designer (CGD Plus)


Length: 8 weeks

Instructor: Ryan Carda, P.E.

Subjects: Renewable HVAC: HVAC Design, Renewable HVAC: Geothermal, Renewable HVAC: IGSHPA Certification

Student Rating

Rating: 8.5/10 (view ratings)
46 students have taken this course


Become a Certified GeoExchange Designer (CGD) with training brought to you from the authors of the IGSHPA Design & Installation Manual: Dr. Charles Remund and Ryan Carda. This course builds on standard curriculum developed by the International Ground Source Heat Pump Association (IGSHPA), the Geothermal Heat Pump Consortium (GHPC), and the Association of Energy Engineers (AEE). This course is designed for engineers, architects and experienced building professionals and covers an introduction to the technology to a complete review of the design process, participants learn the specific information they need to know.

Registration includes training, full access to the instructor over ten weeks, tools and homework, plus a subscription to LoopLink PRO. You'll use this software to design commercial geothermal systems and get feedback from the author of the IGSHPA manual. IGSHPA manuals, membership and exam fees are an optional, additional fee that you can pay when you're ready to sit for the exam.

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Included: LoopLink PRO - The Most Powerful Geothemal Design Software on the Planet

You'll get an unlimited six month subscription to LoopLink PRO when you register for this course. You'll use this software to do full designs.

Not Included: Manuals & Exam Fees

There's an additional $1,000 charge for IGSHPA membership, manuals, and exam fees. (IGSHPA members receive a $200 discount.) You can pay this fee and receive all of these things immediately, or you can wait until you're ready.

Your Instructors, Chuck & Ryan, Wrote the IGSHPA Manual

Dr. Charles Remund wrote the new IGSHPA Design & Installation Manual that provides the foundation for this course. He is the best instructor you'll ever have.

Self-Paced Online Course

This online course is both self-serve and self-paced. You can begin instantly upon enrollment.

Access Information and Build Your Training Library

After enrolling, the course materials will remain in your account and be accessible for as long as the course is offered on the HeatSpring.com marketplace, with minimum guaranteed access for 12 months (1 year) after enrollment. Return to your course anytime with online access from anywhere in the world.

Earn a Certificate of Completion

When you complete this course you are eligible for a certificate of completion from HeatSpring. You can download your certificate as soon as you have completed all of the course requirements. Students can easily share their verified certificates on their LinkedIn profiles using our one-click LinkedIn integration.

I honestly loved the course. I’m always a big fan of Chuck and Ryan so I’m probably biased, but I really thought the course went great, and I took a lot out of it.

- Chris Nowak, CEA - Sr. Project Engineer, Coneco Energy


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Ryan Carda, P.E.

President, Geo-Connections, Inc.

Ryan Carda, P.E. is a Mechanical Engineer at Geo Pro, Inc. and is a co-founder of Geo-Connections, Inc. (creators of LoopLink Geothermal design software). He is a co-author of “Design and Installation of Residential and Light Commercial GSHP Systems", developed in cooperation with the International Ground Source Heat Pump Association (IGSHPA). He has been involved in...[more]

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Course Outline

Welcome - Orientation Materials

This course is self-paced, so you don’t need to be logged in at any specific time. You can get started immediately after you enroll and the course materials will remain in your account with minimum guaranteed access for 12 months (1 year) after enrollment. Typically access is extended for much longer.

Week 1 - Introduction to Ground Source Heat Pump (GSHP) Systems

Geothermal Systems are relatively simple to design, but smart and experienced engineers need to understand a few key concepts before they jump into it. This week’s discussion lays the groundwork for a smooth transition into the geothermal industry. Topics covered include: CGD overview, review of GSHP concepts, components & operation, configuration options, advantages & disadvantages.

Week 2 - Building understanding, pre-modeling, and performing a site visit

Doing a feasibility study is a practical first step to take on any commercial geothermal project. Even if there’s not a budget set aside for anything extensive, there are some simple first steps that will pay off down the road by setting realistic expectations for the client and the team. Topics include: understanding engineering duties, feasibility studies, overview of operating cost calculations, system pre-modeling, understanding site characteristics & coupling options, FTC testing, manifolding options, and installation logistics.

Week 3 - Peak building loads & energy modeling

This week we will review energy modeling in buildings. We will cover the different methods for estimating building loads and review options for calculating accurate system sizing. We will show you how to calculate system sizing by hand using formulas, then review some software options available for simplifying the process.

Week 4 - Introduction to ground loop heat transfer fluids

This week we we will cover ground loop heat transfer fluids. Water quality, fluid density and viscosity, Reynolds number, convection coefficients, head loss, etc. are important, but often overlooked considerations for a GSHP system.

Week 5 - GSHP equipment & system options

Most engineers eligible to sit for the CGD already have a solid grasp of mechanical systems. This week’s lesson helps to identify key areas of focus for geothermal systems – including equipment configurations, performance and proper selection.

Week 6 - Designing the Ground Heat Exchanger (GHEX)

This is the meatiest part of the course because this is what makes a geothermal system unique, and there’s so much to learn. In this week's lesson we’ll make sure you really understand how to properly design the ground heat exchanger.

Week 7 - Connecting the GHEX to the GSHP units

Now that you understand how to properly select equipment and design the ground heat exchanger, it is time to learn how to connect the inside system to the outside. In this week’s lesson, we will discuss ground loop headering, interior manifolding options, interior piping design and circulating pump selection.

Week 8 - Practical considerations, QA/QC & Commissioning

Once the system design in put on paper, you need to know how to verify that the system goes in as specified. In this section we discuss best practices for quality assurance, quality control and loopfield commissioning.

After The Course - Feedback and Additional Resources

No matter how great this course is, we know it's just one part of a bigger journey. In this module we'll start thinking about what comes next. You'll provide feedback on the course, request a certificate of completion, and learn about additional resources. Don't forget that you'll have access to the course materials will remain in your account with minimum guaranteed access for 12 months (1 year). Typically access is extended for much longer without any action needed. If access is removed, contact us for an extension. Feel free to come back as much as you like to continue learning, and please stay in touch. Let us know what you do next and how we can help.

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Geothermal Designer Boot Camp + LoopLink RLC Certification

Learn by doing. This course was designed for experienced geothermal professionals interested in becoming skilled designers. Includes a 1-year unlimited subscription to LoopLink RLC design software and all assignments are completed on this web-based plat

Commercial Geothermal Heat Pump System Design

Dr. Charles Remund, author of the IGSHPA Design Manual, explains how to design a ground heat exchanger for a commercial geothermal system.

Deep Boreholes in GSHP Systems: Pressure Considerations & Installation Practices

This course focuses on the necessary calculations along with the recommended installation practices for deep geothermal borehole design and installation.