Every month, join us for in-depth training and discussion on application and design for modern hydronics technology coupled with geothermal heat pumps.
Hosted by John Seigenthaler

Hydraulic Testing Existing Hydronic Circuits (July, 24 • 12-1pm CDT)
July’s webinar is a continuation of the existing hydronic circuit series. You’ll learn how to use simple equipment and a straightforward procedure to assess hydronic circuits and choose a circulator that’s appropriate for your retrofit projects.
- Learn about the equipment needed to measure the flow rate and associated pressure drop in a hydronic circuit.
- Understand how to construct a circuit head loss curve from test data.
- Learn how to combine the circuit head loss curve with the pump curve of a circulator to determine the flow rate that circulator would produce in that circuit.
- Understand the effect that different fluids such as water and antifreeze have on circuit flow rate.
Upcoming Presenters

John Seigenthaler, P.E.
John has over 40 years of experience designing modern hydronic systems. He’s a hall-of-fame member of the Radiant Panel Association and has presented at hydronic and radiant heating conferences worldwide. John is the author of two textbooks: Modern Hydronic Heating, 4th Edition, and Heating with Renewable Energy.
Who Is The Modern Hydronics Webinar For?
Installers and Techs
Stay up to date on the latest equipment, design trends, and installation options. Grow profitability with the market.
Engineers
Hydronics with heat pumps make excellent renewable options with excellent efficiency. Learn about applications and design details.
Utilities & Energy Planners
Utilities are increasingly incentivizing geothermal heat pumps. We’ll address this as well as ways to decarbonize existing hydronic systems.
Anyone Interested
Hydronics aren’t just an antiquated heating technology. Learn how modern hydronics marry ultimate comfort with ultimate efficiency.
Attend Live
Hydraulic Testing Existing Hydronic Circuits
Thursday July 24, 2025
12–1pm (CDT)
View Previous Webinars
Thermal Testing of Existing Hydronic Circuits
June 26, 2025
Hydronic Deep Dive: Tubing Depth and Performance
May 22, 2025
10 Design & Installation Issues to Avoid
April 15, 2025
The Heat Pump That Changes Everything
March 20, 2025
Reduced Temp in Legacy Hydronics
February 20, 2025
Direct to Load Piping
January 16, 2025
Low Temperature Heat Emitters
December 12, 2024
New Air-to-Water Tech
November 14, 2024
Small-Scale Water Coolers
October 17, 2024