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The Maine Characters

Photo of Rick Karg, president of Residential Energy Dynamics

Rick Karg

Rick is the company’s president. He received his M.A. in economics from Miami University in Oxford, Ohio. He taught economics at New Hampshire College and spent ten years as a building contractor before beginning his long career in the residential energy field.

He has worked with the DOE low-income weatherization program (WAP) on national and state levels; is a frequent presenter at national energy conferences; has worked with gas and electric utilities; and writes curricula, standards, and codes. Rick has been on the ASHRAE 62.2 committee (residential ventilation) since 2007 and was appointed to the Residential Buildings Committee in 2017, serving as its chairperson from 2021 – 2022. In early 2020 he was appointed to the ASHRAE Epidemic Task Force as part of ASHRAE’s response to COVID-19. He was a member of the board of directors of the Healthy Air Research and Certification Authority (HARCA) from 2016 to 2024.

Rick has received many acknowledgments for his outstanding leadership in the industry; he was awarded the Phillip C. Hastings Award in 2015 from Efficiency Maine and was inducted into the Building Performance Institute (BPI) Hall of Fame in 2016, to name a few. In 2013 Rick spoke at the White House (Obama) in support of the Weatherization Assistance Program (WAP). Since 2019 he has served on the Buildings, Infrastructure, and Housing Working Group of the Maine Climate Council, helping develop the plan to significantly reduce greenhouse gas emissions in Maine by 2050, while increasing the resiliency of Maine’s buildings. The published four-year action plan, Maine Won’t Wait, was recognized in 2022 by the American Planning Association as one of the best US State plans.

In 2023 he was appointed to the Air Infiltration and Ventilation Centre’s (AIVC) Industrial Advisory Board. AIVC, with a membership of 17 countries is the International Energy Agency’s information center on energy-efficient ventilation and air tightness. Also in 2023, he was awarded the Residential Buildings Service Award by ASHRAE for “recognition of excellence in  volunteer service focused on residential buildings.”

In 2024 Rick received the Jean Diggs Weatherization Champion Award from the National Association for State Community Service Programs (NASCSP).

Photo of Charlie Holly, Ph.D.

Charlie Holly, Ph.D.

He received his B.S. in mathematics and physics from Western Michigan University in 1986 and his Ph.D. in mathematics from the University of Illinois, Urbana-Champaign in 1992. He taught mathematics at Colby College in Maine and at the University of Illinois.

Charlie was the primary software developer for the ZipTest Pro³ software package and assisted with the design and testing of the ResVent 62.2 app for the iPhone, iPad, and iPod Touch. He is co-founder of Residential Energy Dynamics and the original software architect of the RED Calc web applications. 

In late 2020 Charlie left RED for a position with Pacific Northwest National Laboratory (PNNL). We will miss his smile, kindness, ability to synthesize, and conversations about building science. We wish him well in his new position at PNNL. 


Langdon, Úrsula, and Bridger

Langdon Holly Langdon Holly is our CSS (and most everything else for coding) guru. Langdon has been working part-time for RED since 2015. We give our hardest problems to Langdon; they are always solved successfully. Langdon has taken classes at Colby College in Waterville, Maine and, most recently, at Portland State University in Oregon.

Úrsula Hébert-Johnson first started as a RED intern during the summer of 2014, and then kept coming back. She has played an important role in the development of the RED Math Engine and related complexities. Every calculation performed by the RED Calc tools runs hundreds of lines of code written by Úrsula. Her latest work with RED was in the Fall of 2018 as a software engineer, between an internship and full-time position at Facebook. Úrsula received her B.S. in mathematics from Stanford University in 2018, with a minor in computer science. She is now a Ph.D. student in computer science at the University of California Santa Barbara. We expect great things!

Bridger Holly is a master at quickly developing a working prototype for almost anything. He played an important part in the development of RED Calc Pro and our new website. Bridger graduated from Dartmouth College in 2921, with a major in engineering and a minor in computer science. While at Dartmouth, he was a member of the award-winning Dartmouth Formula Racing team.

Professor mascot

Professor RED

Prof RED is the lead philosopher/scientist at Residential Energy Dynamics, directing the team toward new frontiers of building science and ensuring that we are guided by civility, a passion for life, and truth.

The Professor was born around 1750 during the Age of Enlightenment. The field of building science did not yet exist, so he spent his time discussing philosophy and science in coffee houses*, literary salons, and scientific academies. He has mentioned that often at these gatherings centuries ago, someone would passionately shout “sapere aude!” (Latin for “dare to know”.)

Professor RED has repeatedly told us a story about the day he was debating the fine line between philosophy and science in a tiny French coffee house in Calais with Hume, Kant, Adam Smith, Rousseau, and Voltaire. Fortunately, everyone spoke French. An argument ensued between the Frenchmen; Rousseau and Voltaire; Kant, a German; and Hume, a Scotsman; over the origins of morality.  Separately, Adam Smith and Prof RED, both Englishmen, were speaking quietly at first, but then became enraged arguing over the quality of the Indian tea.  As the commotion reached a crescendo, the shopkeeper expelled the group, insisting that they not return until they had all reached a state of civil enlightenment. 

Our local sage learned a useful lesson from this experience long ago in France: Being a famous character during the Age of Enlightenment does not excuse one from acting with civility in a French coffee house. These days, living in the U.S., Professor RED always acts like a gentleman in Starbucks.

* At that time, coffee houses were often called “penny universities” because a cup was a penny and the conversation was often inspiring – sometimes revolutionary.