How to Design and Sell Mod-Con Boilers - Self Study


Length: 2 modules

Author: Roy Collver

Subjects: Renewable HVAC: Boilers, Renewable HVAC: Hydronic Heating

Student Rating

Rating: 8.2/10 (view ratings)
257 students have taken this course


A significant change in the North American hydronic heating industry took off and gained altitude in the mid 1990’s. Residential and light-commercial gas-fired boilers started to rapidly evolve from high-temperature, chimney-vented appliances to pressure-vented, modulating, high-efficiency condensing (mod-con) boilers.

This 2 week free course will explain the basic economics of mod-con boilers in retrofit and new construction applications. It will teach you what you need to know to start selling this equipment more effectively.

Self-Paced Online Course

This is a self-study, self-paced online course. You can begin instantly upon enrollment and complete the course materials on your own pace.

Access Information and Build Your Training Library

After enrolling, the course materials will remain in your account and be accessible 12 months (1 year) after enrollment. Access can be extended beyond 1 year with a monthly membership. 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.

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Roy Collver

President, OTBC Inc

Hydronics Specialist / Educator, Class 1 Gas-Fitter and Illustrator, Roy has applied his creative force and problem solving abilities toward the improvement of hydronics in North America for over 35 years. His varied experience at the very cutting edge of new development in hydronics has allowed him to apply his unique knowledge and skill set toward becoming a premier...[more]

Course Outline

Mod-con Boilers In Retrofit Applications (part 1)

Many existing hydronic heating systems use high-temperature terminal units, such as fin-tube baseboard. Can the extra cost of installing a Mod-Con boiler in these retrofit situations be justified? The answer is yes - almost always. We crunch the numbers and explain why. In this module, we will explore 5 critical areas. The mining of weather data for system design details so we can find the edges of the envelope. Outdoor reset operation for space heating, how it changes everything. Seasonal heating load profiles – using NRCan research findings into a variety of climate zones. Why Mod-Cons are able to maximize the benefits from outdoor reset. Step-by-step process to estimate how much we can save, even in older high temperature systems. We will look at all of the factors that lead to saving energy, and discuss how much they might contribute.

  • Utilizing Mod-Con Boilers in Retrofit Applications (60 minutes) (Video)
  • Presentation Slides (Download .pdf)
Mod-con Boilers In Retrofit Applications (part 2)

Energy savings after actual boiler plant retrofits are often much higher than initial estimates had suggested. In this session, we show you some of the reasons for these happy results. We also work through a savings estimation method to help you calculate potential energy savings when replacing older boilers with modern condensing technology. Which factors impact boiler efficiency, and how much one can reasonably expect to save? We'll outline a step-by-step process to estimate how much we can save, even in older high temperature systems. We will review the step-by-step process introduced in the first session and punch in some numbers for the remaining 6 factors including: 1) The mining of weather data for system design details so we can find the edges of the envelope, 2) Outdoor reset operation for space heating and how it changes everything, 3) Seasonal heating load profiles and using NRCan research findings into a variety of climate zones, and 4) Why mod-con boilers are able to maximize the benefits from outdoor reset.

  • How to Calculate Mod-Con Boiler Savings (62 minutes) (Video)
  • Presentation Slides (Download .pdf)
After The Course - Feedback and Additional Resources

In this module, you'll provide feedback on this lecture, request a certificate of completion, and learn about additional resources.

  • Introduction to HeatSpring (1 minute) (Video) preview
  • Join the Alumni Network: Add education to your LinkedIn profile in one click (Resource)
  • Feedback: 2-minute Exit Survey (Survey)
  • Certificate of Completion: Request a Certificate (Certificate)

Students who took this course also took

Condensing Boilers in Hydronic Systems

This comprehensive course will help hydronic system designers upgrade their system designs and control strategies to be able to take full advantage of the energy savings and comfort benefits these boilers have to offer.

Multiple Mod-con Boiler Concepts

In this free lecure, Roy Collver examines important details you should know when combining two or more boilers into a single heating plant. He covers applications from large residential, up to bigger commercial and institutional systems.