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Energy Group

The Energy Efficiency division of Nova assists real estate investors in evaluating the efficiency of their asset and reducing utility expenses. Drawing on extensive experience in real estate development and energy consulting, the energy team specializes in translating the energy performance of buildings into financial terms. This analysis gives our clients greater control of their utility expenses, helping to reduce financial risk in an unpredictable energy market. Nova offers almost a decade of experience in the energy efficiency field. We provide custom energy audit reports that include site-specific solutions based on dialogue with clients and actual historic performance. We are able to meet tight delivery timelines that fit within the due diligence period for lenders.

Keely Felton, CEA, CMVP | VP, Energy Efficiency Group

Ms. Felton oversees all Freddie and Fannie green loan reports and other deliverables completed by Nova Consulting Group’s Energy Efficiency Division. In this capacity, she reviews High-Performance Building reports and Green Assessment reports for these programs while working closely with Nova’s clients to make sure that all pertinent information is communicated throughout the process. Keely is a Certified Measurement and Verification Professional. She is highly experienced with utility data analysis, including Portfolio Manager and benchmarking.


Clifford Babson, CEM, CMVP, CEA, BESA, LEED AP BD+C, BPI-MFBA | Senior Project Manager, Technical Team Leader

Mr. Babson is a retired Ship’s Captain with over 25 years of facility and energy engineering experience. He has managed or assessed an extensive variety of facility types, including multifamily, commercial, high-rise, and industrial. He has a strong background in energy auditing, assessment, and modeling. He holds an array of energy industry certifications from the Association of Energy Engineers, the Building Performance Institute, and many others. He has been approved by the state of New York to sit for the Professional Engineers Exam and is also a licensed Real Estate Agent in the state. Clifford is active in professional societies, such as ASHRAE, AEE, BPI, and RESNET, and has been a member of several technical committees, including the BPI Multifamily BA Standards Committee, NREL’s Multifamily Job Task Analysis Committee, the New York State Energy Research and Development Authority’s Emerging Technologies Committee, and the Air Barrier Association’s Technical Committee. He is an accomplished professional trainer and teaches courses in energy auditing and efficient building operations. Clifford developed several curricula to support students seeking industry certification from BPI, AEE, and BOC. He has also taught physics at Ithaca College.


Margo Billings, BPI-MF | Associate Technical Team Manager

Ms. Billings is the Technical Team Leader and Senior Project Manager for Nova’s energy division. Margo is a BPI-certified energy auditor with nine years of experience in building energy efficiency consulting and project management. Her primary responsibilities at Nova include senior technical review of deliverables to Energy Group clients, energy and water usage modeling, and consumption analysis, training and support of field assessors and technical reviewers and  QA/QC of all aspects of project management.


Chris Kessler, BPI-MF | Senior Project Manager

Mr. Kessler has over seven years of experience as a BPI-certified energy auditor with a diverse background in weatherization, HVAC design, solar PV design, and energy modeling. His work includes the Department of Energy Weatherization Assistance Program and General Manager of Rook Energy, a home performance company in southern Maine focusing on building performance at single and multi-family residential properties, small commercial properties, and religious institutions.  Chris is based out of the Portland, Maine office as part of Strategic Energy Group.


Nolan Warn, BPI-MFBA | Senior Project Manager

Mr. Warn is a certified energy auditor and building analyst working out of Shawnee, Kansas. Nolan worked in the renewable energy sector as a Photovoltaic System Designer for 2 years prior to joining the Nova team in April of 2017. Since joining the team, Nolan has conducted 100+ Level I and Level II energy audits and has become responsible for the continued training of the field assessors.