Air Conditioning Installation in Holliston, MA

Garret was incredibly helpful with my issue—knowledgeable, patient, and, in his own words, ready to “nerd out for a minute.” That line made me laugh, but I’m so glad I let him dive in. He broke everything down in the simplest, clearest way, and I walked away actually understanding what was going on.

Endless Energy installed our heat pump a few years ago, and they’ve been nothing short of exceptional ever since. Their responsiveness, their professionalism, and their genuine care have stood out every single time. In all these years, we’ve only had one small issue—and even that turned out to have nothing to do with their system.

Thank you, Endless Energy, for your continued excellence. And truly—give Garret a raise. He’s one of the best, friendliest, and most capable people I’ve ever had the pleasure of working with. He made everything easy to understand, and that kind of service is rare.

Eydin was knowledgeable and very respectful of my tenant's residence and property. What a pleasure it was to work with him. I would certainly be calling Endless Energy again if I had any future issues.

Endless Energy rep (Markus) came to my house to conduct an energy audit. He was very knowledgeable and answered all my questions.

The service technician was fantastic

Brian the carpenter was wonderful! He is diligent with his work. His attention to detail is second to none and he is truly knowledgeable. Having him do the repair work was a really lucky for us.

Professional, honest, and knowledgeable.

Gavin and Garrett did a great job installing the system. They were able to fit it into a tight schedule so the the work could be done before the holidays. Thanks to you both!

We had an excellent experience with Endless Energy, thanks to technicians Rob and Brendan. They came to our home to do both duct cleaning and duct sealing, and we were honestly shocked by the amount of buildup they showed us in the ducts from the previous owners. We are so grateful to have all of that removed.

They later returned to complete the duct sealing, and the results were nothing short of amazing. Our system’s capacity improved from 65% to 95%—an astronomical improvement that we could never have imagined.

From start to finish, our experience with Endless Energy has been nothing but positive. This is a company that truly cares about the homes they work in and the people who live in them. We recommend them without hesitation. If you’re looking for any HVAC work, give them a call!

Prompt and professional. Super helpful visit