Energy Ratings
Testing for Builders, Developers and
Homeowners.
Serving all of Massachusetts and Rhode Island with professional energy modeling,
field testing, and Mass Save® incentive administration.
about us
What We Do
C2S Energy provide turnkey HERS Rating and Energy Code
Compliance services for residential and light commercial
construction.
HERS Ratings
A HERS rating is the most common method to show compliance with local energy codes and apply for utility incentives.
Energy Code Compliance
We can determine which code is applicable to your project and find a path to compliance that fits your goals.
Duct Leakage Testing
We provide duct testing services to help HVAC contractors and builders comply with the new energy codes.
Blower Door Testing
Building codes require a blower door test on all residential new construction and many renovation projects.
Manual J/S/D
We provide precise Manual J load calculations, Manual S equipment selection, and Manual D duct design.
Our services
Who We Serve
paperwork, maximize Mass Save® incentives, field testing & support, ensure your
home is efficient & rebate-eligible
Why Choose Us
Certified HERS Raters
IECC & Mass Save® specialists
Local Expertise
Deep knowledge of building codes in MA & RI
Hands-On Support
We coordinate directly with your trades
Incentive Management
We handle the Mass Save paperwork
Builder-Friendly Pricing
Competitive, transparent, no surprises
our process
How It Works
From Initial Review to Final Certification. Our proven 3-step process
ensures your project meets all requirements while maximizing your
energy savings and incentives.
Step 01
Onsite Testing
Blower door, duct, and ventilation testing
Step 02
Onsite Testing
Blower door, duct, and ventilation testing
Step 03
Onsite Testing
Blower door, duct, and ventilation testing
Testimonials
What Our Clients Are Saying
Jane Cooper
C2S Energy is an excellent company with a field supervisor who cares.(“Nelson”) They did an awesome job on my wall.. & the crew actually cleaned up after they were done. My wall …
Kristin Watson
David, Mario and Carlos arrived at our home on time and knew exactly what needed to be completed for our particular job. They were respectful, friendly, and worked every second …
Jacob Jones
I am very happy with David, Carlos and Mario from C2S Energy. David kept me updated as they worked insulting my home. They were punctual, courteous, and hard working …
Stephen Krudys
Juan, his father and the whole C2S Energy crew did an outstanding job insulating my home. They frequently checked with me and explained the entire process from start to finish. The whole …
Rachel Boutin
I am very happy with David, Carlos and Mario from C2S Energy. David kept me updated as they worked insulting my home. They were punctual, courteous, and hard working. They all worked as …
Tim Obrien
Phenomenal experience from start to finish. Could not recommend C2S enough. We had two mini-splits installed they look and work great. Excellent communication with Richie throughout the …
Get in touch
Start Your Project. Book Your Free
Energy Consultation.
Frequently Asked Questions
Got Questions? We’ve
Got Answers.
Yes. Most new residential construction requires a certified HERS rating to meet IECC and stretch code requirements.
Absolutely. We handle the entire submission and compliance process.
All of Eastern MA and RI, including Cape Cod, Fall River, Worcester, and surrounding towns.