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Committed to Your Home and Community

At SumZero, we’re not just an HVAC contractor — we’re a team of design-first, mission-driven professionals who believe in doing things the right way.

Our story began in a Florida training room and took root at a Panera Bread table. Since then, we’ve grown into one of Massachusetts’ most trusted names in heat pump installation and electrification — not because of what we sell, but because of how we serve.

This page is your starting point for learning who we are, how we work, and what we believe.

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Our Story

From two guys with a shared conviction to 1,800+ installs across Massachusetts.
This is where it all began.

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Our Mission

We don’t push products — we lead transparent conversations about whether heat pumps are right for your home.

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Our Core Values

Values like “We Care” and “We Do the Hard Stuff” aren’t slogans — they’re how we show up, every day.

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Meet the People Who Make It Happen

Our Leadership

Get to know the folks guiding our field crews, coordinating installs, and keeping promises behind the scenes.

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How We Work

Our Process

Learn the 7-step framework we follow for every heat pump project, from consultation to post-install care.

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Our Service Area

Based in Holliston, MA — serving homeowners across Metrowest, Greater Boston, and surrounding towns.

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Rooted in Community

Our Community

From sponsoring school jog-a-thons to supporting local pantries and nonprofits, we believe success is something you share.

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Our Service Area

Based in Holliston, MA — serving homeowners across Metrowest, Greater Boston, and surrounding towns.

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Not Sure Where to Start? We’ll Guide You

Let our experts design the right heating and cooling solution—customized for your comfort, your layout, and your energy goals. No pressure. Just clarity.

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