BPI Building Science Principles (BSP) Certificate launches in two weeks

About this course

This lecture explains the importance of low water temperature heat emitters and distribution designs in modern hydronic systems. It covers the relationship between heat source efficiency and water temperature. It shows and describes several types of heat emitters that can operate at low water temperatures. It goes on to describe homerun distribution systems and modern variable speed circulators. It concludes with three examples that put all the sub-assemblies into complete systems.

By the end of the lecture you will understand:

  • The universal relationship between operating water temperature and the efficiency of modern hydronic heat sources.
  • Methods for constructing low temperature radiant ceiling and wall panels
  • How several different sub-assemblies come together to form complete low-temperature systems.

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Course outline

2 modules • 4 assignments • 48 minutes of video lectures

Module 1 • 2 assignments
Video Lecture and Discussion

In this module, you'll watch the video lecture and download an MP3 recording of the 1-hour Q+A call.

  • Low Water Temperature Hydronic Distribution Systems (48 minutes) (48:23 minutes)
  • 1-hour Q+A call recording (MP3)


  • John Siegenthaler

    P.E., Appropriate Designs
    View profile

    John Siegenthaler, P.E., is a mechanical engineering graduate of Rensselaer Polytechnic Institute, a licensed professional engineer, and Professor Emeritus of Engineering Technology at Mohawk Valley Community College. “Siggy” has over 40 years of experience in designing modern hydronic systems. He is a hall-of-fame member of the Radiant Panel Association, and a... Learn more

Frequently asked questions

How does this course work?
This is a free course. Enroll today and get access to all of the materials instantly. The lecture video and other materials are available any time.
How long do I have access to the materials?
For free courses there is no guarantee for how long the course materials will be available.
Is there a certificate of completion?
Certificates of completion are only provided to HeatSpring Membership subscribers. This course has not been approved by any credentialing organizations (NABCEP, AIA, USGBC etc) for Continuing Education Credits (CEUs). This course is for self education purposes only and completion does not indicate a level of professional expertise or credential.
Can I register multiple people?
Yes, this is a free course so you can share this page with other people from your group.


Based on 70 reviews
students have taken this course
Robert B

pay attention & learn as much as possible because these courses are worth their weight in gold

Shaun Jackson

The course is very much useful

Saravanan S

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