Your Full-Service Energy Efficiency —Partner in Massachusetts
From no-cost Mass Save assessments to finance-ready installs — insulation, heat pumps, mold remediation, roofing, windows, and certified HERS ratings.
For Homeowners
- Mass Save incentives
- Insulation & air sealing
- Heat pumps & mini-splits
- Mold, Knob & Tube, vermiculite removal
- Roofing & windows
For Builders & Developers
- Stretch Code & Passive House support
- Energy code compliance
- Certified HERS Ratings
Unlock Major Savings with Mass Save
$16,000 Off Mini-Splits
High-efficiency ducted or ductless systems with rebates.
100% Off Insulation & Air Sealing
No-cost weatherization services for eligible homes.
0% Financing
Mass Save HEAT Loan up to $25,000 for 7 years.
Why Choose C2S Energy?
We Do the Work
Not just audits — full installs from start to finish.
One-Stop Shop
From audit → financing → installation, all in-house.
Local & Trusted
Based in New Bedford, serving Massachusetts communities.
Certified HERS Raters
Expert guidance for builders, architects, and developers.
What Our Customers Say
Ready to Get Started?
Book your no-cost Mass Save assessment or request HERS rating services today.