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

Fluid Quality in Hydronic Heat Pumps (September 25 • 12-1pm CDT)
Creating a hydronic system that lasts requires intentional design, quality components, professional assembly, AND good fluid quality. The September Modern Hydronics & Heat Pumps webinar will provide a deep dive into water quality, proper preparation of the system, and the best approach to creating antifreeze solutions. It will be presented by 26-year industry veteran Chad Marzitelli from FERNOX, one of the global leaders in water treatment for hydronic systems. Plenty of frequently asked questions will be addressed, and there will be time for other questions from attendees.
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.

Chad Marzitelli
Chad provides professional hydronic industry knowledge. His career has been focused on the hydronic and geothermal industry his entire career. Currently as the Midwest Regional Sales Manager for Fernox, his career evolution progression encompasses from a Distributor, Manufacture Representative and two additional industry leading hydronic focused Manufacturers.
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
Fluid Quality in Hydronic Heat Pumps
Thursday September 25, 2025
12–1pm (CDT)
View Previous Webinars
Comparing Air-to-Water Heat Pumps to Ductless Mini Splits
August 21, 2025
Hydraulic Testing Existing Hydronic Circuits
July 24, 2025
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