Residential Energy
Resilient Climate Solutions
Half a century of experience as a leader in designing and delivering successful residential energy programs for income eligible and market rate programs.
We are experts in implementing sustainable residential energy programs.
Consistent Excellence: Meeting Goals, Quality Work, and Strong Partnerships.
We have a reputation for consistently meeting or exceeding program goals, providing high-quality work, helpful customer service, and building strong partnerships with contractors, utility companies, and state agencies.
At a Glance
Thousands of single-family units served annually for IOU and MLP customers
BPI Goldstar Contractor, BPI Building Analyst, Healthy Homes certified team
Weatherization Boot Camp Trainer
Leading program innovator, including Inclusive Utility Investments, carbon-based incentives, whole-home decarbonization audits
Weatherization Assistance Program administrator
RESIDENTIAL ENERGY SERVICES

Implementing decarbonization through energy efficiency and electrification.
Our services extend to Mass Save, the NextZero program for MMWEC, Eversource, National Grid, Avangrid, Liberty Utilities, and independent utility programs, where we offer a diverse range of services, including C&I, multifamily, and residential Mass Save services (RCD).
Advancing Community Sustainability Programs
From Inclusive Utility Investments (IUI) to Induction Lending Programs and the Weatherization Program (WAP), we strive to empower underserved communities and promote environmentally friendly practices. Read on to learn more about our efforts and how they’re making a difference.
Inclusive Utility Investments (IUI)
CET is partnering with utilities to offer IUI financing programs to increase participation in home decarbonization among low-income and rental customers.
Weatherization Program (WAP)
In collaboration with the Department of Energy and Environmental Protection, we administer the Weatherization Assistance Program (WAP) designed to provide support to low-income households.
Carbon-Based Rebate Tool
The traditional focus on energy conservation is no longer sufficient to meet our decarbonization targets. Our tool uses carbon mitigation potential as the metric to determine rebate levels for a wide range of measures.
Equitable Programming
Advancing Inclusion and Innovation: CET’s Commitment to Underserved Communities
Leading Innovation for Access and Equity
CET is at the forefront of innovation, spearheading initiatives to enhance access to underserved communities and market segments.
Expanding Residential Energy Access for All
Through Healthy Homes pilot programs and the development of Inclusive Utility Investments, CET is dedicated to expanding residential energy access for income-eligible customers, including renters.
Best Practices for Underserved Communities
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Aligning Energy Savings with Health Goals
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They Trust us














































From Cities to Homes
Trusted by Municipalities and Homeowners Alike

PMLP has been working with CET on an ongoing initiative for over a year now and the entire CET team has always gone the extra mile to make the project a success. We have no regrets about partnering with them!
Bryan Howcroft
Peabody Municipal Light Plant
[CET’s] deep expertise and extensive experience in the sustainability space have been invaluable to our organization. Over the course of our partnership, CET has demonstrated an exceptional ability to craft innovative and impactful decarbonization strategies, helping us to achieve meaningful progress in our sustainability goals.
Ashley Wilson
Ipswich Utilities Department
CET works very hard to find the solutions that work for individual farmers, business, and folks in our community.
George Krivda
USDA
We had no idea where to start, but CET walked us through everything. It felt like having a personal guide for the whole process. When this program came to my attention, we had been wanting to make improvements for a long time, but the affordability was a problem. I said, ‘This is the greatest opportunity we will ever have.
Jill Roberts
ESHLP Customer
They were totally willing to work around our hours, I would love to work with them again, it was really easy.
Jennifer
Clinic Alternative Medicines