SumZero Energy Systems

UPDATE: A few hours after writing this we LOST ALL HEAT DURING A BLIZZARD. No power interruptions, it is THE SYSTEM NOT WORKING YET AGAIN. Called only to be told we'd get NO help or support for two days. Our entire house is only around 55 degrees now and we can't safely leave. DO NOT USE THIS COMPANY. I am so unbelievably upset. We called Friday asking for help and now here we are, heatless with two kids home during a blizzard. ----------------------------------- I waited a long time to write this review because we gave SumZero many opportunities to correct ongoing issues that have existed since day one of installation (a few years back). Unfortunately, we continue to have persistent problems with both heating and cooling. We have two young kids and at this point it is unacceptable these i

The entire SumZero experience was fantastic from start to finish. Paul came out and did a nice walkthrough to give us a full understanding of exactly how our system should be sized and quickly got us estimates with all MassSave included (and they take care of all of it so you get instant savings). Jackson and Lara were great to work with and did a great job with the project walkthrough and getting everything scheduled quickly. The team uses a nifty app called ServiceTitan so you always know who is coming and get live updates on their arrival which is extremely convenient. When the team showed up for the installation, they had everything they needed and were great about communicating every step along the way and asking questions to make sure everything was just how we wanted it. The attent

SumZero folks did great work. Everyday they come and put down protection rag on the floors, and when they leave for a day they vacuum and clean up. So no interruption to our life while they were installing the heat pump system for us. The system has been working great, even in really cold weather, it heats up the house quickly. Best of all it have virtually no noise when it’s running. Great work!

Paul and Jose from SumZero were great. They did a yearly check on my heating system and boiler. They saw that the pressure was a bit high and fixed the issue right away. They also checked my ducts. Annual checks do make a difference. Very pleasant and knowledgable guys who didn’t rush me with the few extra questions I had.

Sum Zero is very responsive and was able accommodating with time frame. They scheduled Dan who has been here before and is excellent. Dan is extremely knowledgeable, he checked everything and found a couple problems which he resolved. He also explains what the issues were and what he has done and made sure I understood some things operating Ecobee.