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Our Commitment to Community

We Don’t Just Work Here — We Show Up Here

At SumZero, community isn’t a marketing line — it’s our street, our school, our church. It’s where our team members raise families, serve others, and find meaning far beyond the job site.

We believe good companies strengthen the places they live. That’s why we support organizations that bring hope, stability, and health to the people around us — with no expectation of credit.

Where We Give — and Why

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We donate to Live4Evan, a local nonprofit providing temporary housing for families of children undergoing critical heart treatment. This cause hits home — literally and emotionally — and we’re honored to support their mission of keeping families close during hard times.

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We proudly sponsor the annual Jog-a-Thon organized by MetroWest Christian Academy, a school connected to Connect Church — where many of our employees and their families attend. You’ll find us not just on the sponsor list, but on the sidelines — cheering on the kids, and showing support for something bigger than ourselves.

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Through regular support of the Holliston Pantry Shelf, we help ensure local families never go without basic needs. Food insecurity is real, even in our own neighborhoods. Giving here is part of how we care — quietly and consistently.

A Culture That Extends Beyond the Job

We don’t separate “company culture” from community service. To us, they’re the same thing.

Our people are encouraged to:

  • Participate in service projects
  • Nominate causes they care about
  • Show up for events that matter to them
  • Live out the values we put on our job cards: We Care. We Do the Hard Stuff. We Do What We Say.

When you build a team that serves each other well, serving the community becomes a natural extension.

This Is What Success Looks Like to Us

Yes — we track metrics, performance, and installs. But we also track this:

  • Are we proud of how we treat people?
  • Are we making life better in places that need it?
  • Are we using our success to create space, dignity, and opportunity for others?

If the answer is yes, then we’re doing our job.

Want to learn more about the areas we serve? Discover our service area and see how close we are to helping you.
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What Local Homeowners Are Saying

See how SumZero has helped local homeowners stay comfortable year-round with energy-efficient heat pump solutions.

The first word that comes to mind is OUTSTANDING when I think about SumZero. My husband and I just bought a home with a very old HVAC system and knew we needed an update. The first thing we did was speak with Sarai Ortiz who explained to us all of the steps we needed to take in order to see what system was best for us. She was very helpful and followed up with us throughout the entire process. Hearing that we needed a new system, David Sampaio promptly came to our house to give us a quote on what system he thought was best. My husband loved what he presented and did not hesitate to take the offer. Since we did not have the expenses for the system at hand, Sarai walked us through getting a heat loan through Mass Save. This process was so easy and the loan was finalized within a week! We were so excited to get things rolling, but of course things were on hold due to the pandemic. Even though we had to wait a couple more weeks than anticipated, Sarai and David kept us in the know and answered every question that we had. Once the time came to have the new system, SumZero was more than happy to make us a priority! The workers were on time, efficient, and very kind. Not once did I worry or question the quality of work they were doing. After two days, the work was complete! Daniel was able to walk me through what was installed and how to use the new thermostat, which we love! We now have a home that is comfortable to live in no matter the season. If you’re looking for a new HVAC system, SumZero is the one to call!
Danielle Montepeque