We are the official NABCEP PVA training partner of the

2021 NABCEP CE Conference!

Finally Fossil-Fuel-Free: Air-to-Water Heat Pump & Ventilation Retrofit - Self Study


Author: Brian Just

Subjects: Green Building: Building Science, Renewable HVAC: HVAC Design, Green Building: Sustainable Building, Green Building: LEED

Student Rating

9.0 out of 10 (view ratings)
365 students have taken this course


This course was originally presented at BuildingEnergy Boston 2020, a conference presented by the Northeast Sustainable Energy Association (NESEA)

Air-to-water heat pumps have generated a lot of excitement for their enormous retrofit potential. This case study details one home’s retrofit to an AWHP system, which was developed by hydronics experts to be simple and repeatable. The project encompassed distribution systems, domestic hot water and backup heat, as well as a ventilation system upgrade from exhaust-only to high-efficiency fresh air (balanced) ventilation. We’ll present full project costs, before/after breakdown of energy models/costs, details on the beyond-energy motivations and benefits gained by the homeowners, and we’ll share extensive data from this project’s comprehensive monitoring systems along with two other installations in Vermont. We’ll summarize lessons learned and the limitations and challenges in designing for air-to-water retrofittability. There will be ample time for lively Q&A.

Learning Objectives

Ready To Sign Up Today? Click Here to Enroll

Flexible Online Training for Industry Professionals

This is a self-study, self-paced online course. You can begin instantly upon enrollment and complete the course materials at 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. Rewatch videos and review assignments as many times as you want. View updates the instructor makes to the course as the industry advances. 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 LinkedIn integration.

Continuing Education Credits Available for Additional Fee

The course and all materials are available for free. If you would like continuing education credits they are available through NESEA for an additional fee after completing the course. There is a $25 administration fee per course to receive credits, no matter how many types of credits you are seeking, to help cover NESEA's CEU costs and staff time. (NESEA is a non-profit organization.)

Earn Continuing Education Credits

Approved for: 1.5 AIA LU/HSW, 1.5 BPI CEUs, 1.5 GBCI credits, 1.5 hours towards MA CSL 4.5 hour block.


Brian Just

Manager, Engineer, Vermont Energy Investment Corporation

Brian manages a team of Efficiency Vermont's residential energy consultants and works on a variety of energy efficiency initiatives at VEIC. He holds degrees from the University of British Columbia (MASc, Mechanical Engineering) and the University of Minnesota (BME, Mechanical Engineering). He is Passive House and LEED AP accredited, and currently serves as president of...[more]

Course Outline

Fossil-Fuel-Free at Last: Air-to-Water Heat Pump & Ventilation Retrofit

  • Fossil-Fuel-Free at Last: Air-to-Water Heat Pump & Ventilation Retrofit (Video - 01:27:31 hours)
  • OPTIONAL: Take quiz for CEU credits (Quiz)
  • OPTIONAL: Request CEUs from NESEA (Resource)
  • OPTIONAL: Subscribe to NESEA Communications (Resource)

Students who took this course also took

ASHRAE 62.2 Ventilation for Single-Family Dwellings

Instructor Rick Karg is has been a member of the ASHRAE 62.2 ventilation committee since 2007 and heads the existing dwellings group. He served as the lead editor of ASHRAE’s Guideline 24-2015, a document that supplements the ASHRAE 62.2 standard.

Zero Net Energy Buildings

A step-by-step guide to designing zero net energy buildings, including energy modeling, architectural drawings, and construction strategies with expert Marc Rosenbaum.

Deep Energy Retrofits

Learn how to best 'fix what you have'. If you are serious about transformative energy upgrades in existing residential and commercial buildings up to 45,000 square feet this course is right for you.