We purchased a mini split heat pump system for our home, Paul and Saria were amazing - they stayed in constant touch with us before during and after the installation. I walked into one of the rooms where they installed a unit and one of the workers was hand wiping the entire unit like it was a precious piece of artwork. I cannot say enough great things about the team, they made the entire process of using MassSave smooth and painless. I would highly recommend them.

... watching contractors work on your house did you ever think- "wow these folks sure work like they work on their own homes?".... No? Sarcastic much? Wishful thinking? I thought so too. We all dread dealing with contractors as we know most of them are.... Dreadful to deal with. Facts. So that is how I felt too when I decided to switch my house from oil heat to electric. Due to the size of the house It was going to be a large project involving a complex setup of multiple condensers, air handlers and ceiling cassettes. I had in mind what I wanted, so I needed a contractor to look at my design and make changes as needed, provide input based on experience and execute it. The vendor would need to understand modern cold weather heat pump solutions and installations in a complex near- commercial environment. They also would need to understand integration with the heavily automated existing controls in my house. Like a good citizen I solicited several well- established HVAC vendors to provide me with quotes. I actually spent an hour or more with each one showing and explaining my property and current set up. All nine of the contractors said they can do it and will provide quotes. I got back... 3 quotes. But it wasn't a problem as I knew which vendor I will go with based on my interactions with them price notwithstanding. Ilija from Sumzero was the only guy that was technical enough and had sufficient knowledge to understand what the project involved and to make welcome changes to the specs and equipment based on load calculations. The installation went as planned. The team led by Paul showed up on time every day and worked extra hours to finish the job in a week. Remember the opening statement about contractors working like they work on their own home... This was how it looked and felt when I watched them work. No corners were cut and when I asked for a bit more here and there I was accommodated without any questions. Marcelo (lead tech) and the team worked hard and provided outstanding results. The last day presented a challenge where my existing controls needed to be integrated with the new controls. Daniel is their controls guy and our initial conversation was actually funny. I started to explain how I want the integration to work and Daniel interrupted me midway and finished my thoughts. Yeah- he is that good. Overall, I believe that companies like Sumzero are very very rare in the field. Knowledge, expertise, work ethics, communications with customer- it is all done well. So if you have an HVAC project regardless of its complexity- you should give them a call. You will not be disappointed. My 2 cents

We had a heat pump/AC system installed 6/14-6/16/23. I knew I wanted to use this company the minute Raphael (sales rep) came to the house to explain everything in detail that would occur. He made sure I felt Comfortable with the whole process and answered all my questions before committing. Sarai was very help via email and they also take care of the MassSave application which was one less thing I had to worry about. Prior to the crew company, Wanderson came to the house to go over everything and make sure there weren’t any unanswered questions. He was very polite and informative. The crew scheduled to be at my house came on time and stayed late to get the job done. The had to remove the old system and install a new one in just 3 days! Our crew was Arthur, Paulo, Douglas who were very attentive to detail and provided excellent quality work. Last but not least, I forgot their names but the two electricians that came with this crew were phenomenal. Overall, I highly highly suggest you use this company. You will not be disappointed.