Our Service Area

Over-the-top outstanding communication with company throughout process. In this area, never seen anything like it from contractors. They mostly setup masssaves heat loan for me: as much as they can, and were patient, attentive as I waited on that process. They even encouraged it (if that’s what I wanted.) NO other company among 4 competitors did that. Do your homework, see pictures, you’ll see this co. does neat and tidy work, and their technical expertise seems to match that. I’m actually proud that we found and picked them, for my part. In the end, still work done by contractors, so important to know what people typically find wrong with type of work you’re having done, and keep an eye out for those things. The few small details I pointed out, sum zero guys were all over it, no pushback. And…they are ahead of the game in that area too: they have experience and have clearly learned from it. The could explain why they recommend what they recommend based on customer feedback. They are very cutting edge in AC tech., materials, smart home tech., communication with customer—customer service in general. Everyone was on the same page with that. As of May 2022, this is a company that seems to be in a good place doing good business. I prioritize capability over “nice gals/guys,” but worth mentioning that they have people skills. Especially young guy that assessed and did sales end—really bright. So, this is genuine, I feel like they went far enough to be worth my time writing a review. Recommended.

Working with SumZero (especially Paul, Sarai, Ilija, and the installation crew) was a great pleasure. The project included the installation of two Mitsubishi Electric mini-splits and one Mitsubishi Electric ducted system with two zones. We were able to get the installation done within a few weeks after contacting SumZero. Paul was amazing in addressing all our zoning/system needs. For example, he proposed a fantastic zoning solution that other companies that I contacted didn't think of. Sarai and Ilija were amazing in supporting us with MassSave rebates/heat loan/scheduling/etc. The installation crew was friendly, worked efficiently, and kept us in the loop throughout the installation.

We wanted heat pumps but have an unusually shaped house and had worked out it would be likely be an expensive and tricky job (in fact, we were told this by another company we had come out). Sum Zero’s team were by far much more creative and ended up costing us less and doing a much better job than what we expected based on other companies’ recommendations. Now our house is whisper quiet and cool in the summer and cozy and warm in the winter. Each step of the way we met professional members of their team who were friendly, smart and clearly take pride in their work. We recommend them to anyone considering installing heat pumps because we’re so happy with their work!