about us

Jon Haehnel | Founder & Owner


Jon has been testing and inspecting institutional and commercial buildings for over 13 years. Jon has tested buildings as large as a city block in downtown Manhattan and as small as an 81 square foot automated weather station slated for Antarctica. Jon's expertise is in building envelope testing and design. Most of his work focuses on new and retrofit commercial and institutional construction but he also does forensic testing to determine the root cause of high energy costs, mold, ice dams, and pipe freeze-ups. Jon is a certified Building Performance Institute (BPI) Building Analyst and Envelope Specialist. Jon is currently the blower door and energy auditor instructor for Vermont Technical College and the coauthor of the paper Setting Airtightness Standards in the ASHRAE Journal.  He has also presented on building envelope commissioning at the Better Buildings by Design Conference in Burlington, VT in 2013, 2014, 2016, and 2017.

Mike LaCrosse | Project Manager

Mike joined Zero by Degrees after having graduated from Keene State College in Keene, NH in 2012 with a Bachelor of Science in Architecture and a particular focus on building science. Today, he now teaches an undergraduate building science course for the college’s architecture program, incorporating much of his day to day experiences with Zero by Degrees into his course curriculum. In 2011 Mike acquired, and continues to maintain, his certification as a “Professional Building Analyst” through the Building Performance Institute (BPI). 

With Zero by Degrees, Mike has broadened his professional career into the commercial sector, completing envelope design reviews, performing mid-construction quality assurance services on dozens of buildings, and managing large scale envelope commissioning projects and blower door tests on buildings as large as 150,000SF. His diverse background gives him the ability to effectively understand and communicate with all members on a job site, from architects to engineers, and the like.  Mike is a believer that building function coincides with building design, and not only from an architectural standpoint, but from an energy standpoint as well. Mike was a past presenter for the Better Buildings by Design Conference in Burlington, VT in 2017.

Quinn Treadgold 

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Quinn joined Zero by Degrees in November 2016, shortly after having received his Bachelor of Science degree in Mechanical Engineering and a minor in mathematics. Quinn grew up in Voorheesville NY, a small town on the outskirts of Albany. He has always enjoyed the outdoors, including skiing, camping, kayaking, running marathons with friends; the list goes on. Quinn has a likable personality and approaches all members of a project unassumingly, and is able to listen to the needs of a client. Quinn's background in mechanical engineering is, in many ways, harmonious with some of the services that Zero by Degrees provides to its clients. Quinn enjoys making these connections as well as finding new ways to incorporate other areas of his background into the work he does with Zero by Degrees. 

As a part of Quinn's growth within the company, he has begun to take on project management roles, exercising management skills with a couple of small commercial projects local to the VT area. We are glad to have Quinn as part of the ZbD team.

Peter pesano


Peter joined the Zero by Degrees team shortly after graduating from Keene State College in 2017 with a Bachelor of Science degree in Architecture. While attending Keene State, Peter gained knowledge on commercial and residential construction, energy efficient and sustainable design, and building science concepts that prompted his professional career.  “While primarily studying building construction and design concepts, I was able to also take several courses in Environmental Studies which drove my passion to be a part of bettering our environment through building energy efficiency.” Peter has been able to implement his knowledge of building science on many projects while continuing his education through field experience and attending the most recognized conferences throughout New England where he has heard from, and connected with, some of the most renowned in the field. “I am eager to keep up and grow with the fast-moving industry that building science is.”


p. 802.522.9713                                    e. jh@zerobydegrees.com

Serving Vermont, New Hampshire, Maine Massachusetts, Connecticut, Rhode Island, and New York

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Our Services

Experts in the construction industry, we pride ourselves on our knowledge and experience in energy efficiency.

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Past Projects

Our project list contains a variety of building sizes and complexities. 

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ZBD Newsletter

"ZbD: Notes From the Field" covers technical articles, as well as industry related topics we would like to further review.

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