From the moment our family walked through the door of Alternative Heat Source, Karl made us feel…read morecomfortable. He did not try to "sell" us a stove, he educated us on the differences, and made a recommendation based upon the stove we were currently using. His son, Kory, came out two days later and took a look at our current stove and chimney layout. He spent nearly an hour looking things over and patiently putting together a couple different quotes for us to ponder. Over the next few days, I emailed Kory with many questions, to which he was receptive and honest, and never tried to pressure us into making a decision. He only provided us with the necessary information to make an informed decision. Once we made our decision, Kory returned ten days later, and professionally installed our new stove. He even moved our old stove into our garage for us. He took the time to touch-up the paint on the stove pipe, and cleaned up every bit of the mess they made, even as minute as it was. I could not be happier with Alternative Heat Source, and highly recommend their sales and service.

Kory was great to deal with! We had an appointment with Irving to install the gas lines and tank…read moreand Kory rearranged his schedule to be at our home early and have the stove installed before Irving came out that day. After the stove was installed he assisted the Irving tech with the install, and stuck around until the propane was fully functioning. He tested out our stove and showed us how to work the remote and all the features of the stove. I highly recommend their work and professionalism!

Dominic came to our home on time and did a great job with cleaning our Heat pumps. He is an hard…read moreworker, through, very clean. All my pumps work like the first day of use now and I cannot say enough about the work ethic of Domonic. Great worker. I paid a fair price for the excellent work done. I will request Dominic for the next cleaning.

I had a good experience with this service. The owner himself came over and did a really good job…read morecleaning my dryer exhaust vent, which was in pretty rough shape.

OUTSTANDING !!!!!! I reached out to discuss the service needed (sump pump installation) , and was…read morecontacted by someone in less than 30 minutes, and they provided us with an estimate for the project. They arrived on time and were incredibly helpful with explaining what they were doing. The job was completed quickly and done well. After the job was completed we had a question, and once again they responded quickly and gave us the resolution we needed. I highly recommend this company and if needed will use their services again.

Everything with this service was great . Communication ,…read moretimeliness and quality of service and pricing . Highly recommend .

ASK mechanical has great communication and was able to service my furnace in a timely manner. Their…read morepricing was adequate and the servicer provided pictures and an update after the servicing. I will plan to use them again in the future.

Ask mechanical installed a new boiler for me. Anthony was very good at communicating throughout the…read moreentire process. Anthony is knowledgeable and will make sure the job is done right. Even helped me troubleshoot a unforeseen technical issue with my existing Nest thermostats on a Saturday.

Incredibly fair people. Great experiences both time we had…read morethem come out this year (separate issues). Our Auntie was very happy with them as well!

Found water puddling in my yard, and am SO grateful to have found this company. I had Garrett come…read moreout to do a sewer repair and he was super helpful in making sure I understood what he was doing, and why he recommended the repair that he did. He was even able to come the same day, which was incredible! I'm so happy to have a go-to plumber if I ever have an issue again thanks so much!!!

Downeast Electrical Services just finished a menu of electrical work at my house. The team was…read moregreat! From responsiveness to quality; everyone i dealt with was patient and professional. I would highly recommend them.

They were responsive to initial request and follow up discussions. Ultimately I went with someone…read moreelse based on timeline but would still recommend them.

I called their office again today, regarding a repair issue, and I spoke to both Rachel and Nicole…read more They provide excellent customer service. I'm also impressed every time I call the Hollis Office!

Our recent annual maintenance service with Gammon's Heating & Cooling was an excellent experience,…read morethanks to technicians Tyler and Aaron. Their technical proficiency was evident throughout the visit. They serviced our nine wall units and two outdoor condensing units with care, attention to detail, and a clear commitment to doing the job correctly. Although our heat pumps were originally purchased and installed by Gammon's, this was our first full annual maintenance under their service program. We had expected the work to occur in early fall or mid‑winter, but due to a high volume of emergency heating calls, the company requested that we defer to spring. While the delay was understandable, it highlighted the importance of strong scheduling and dispatch coordination. During the visit, Tyler and Aaron identified several condensate drains that had not yet been tied into the sewer system and completed that final installation step. This proactive work likely prevented future moisture‑related damage to walls or flooring, and we are grateful for their diligence. Their problem‑solving skills, tenacity, and customer‑focused approach stood out and gave us confidence in the long‑term reliability of our equipment. We did choose to upgrade to a more comprehensive maintenance plan and look forward to having our annual service scheduled just ahead of the winter heating season. We recommend Gammon's Heating & Cooling and believe the company delivers strong technical service. One area of opportunity is dispatching and scheduling. It would be helpful for dispatch to confirm the number of units at a customer's home, understand where equipment is located, and estimate the appropriate number of technicians needed. Additionally, providing more accurate arrival windows--or proactive updates when schedules shift--would help customers avoid waiting longer than expected. Overall, the quality of the technicians' work was excellent, and with some refinements to scheduling and communication, the customer experience could be even stronger. We look forward to their handyman sheet rocker coming to patch and match wall section removed and their electrician coming to correct ground fault circuit that appears to be missing a neutral wire.

Absolutely awful…read more Since I posted my first review, we found out that two of our units were faultily installed. One led to widespread leaking (where they didn't attach the hose properly to the unit to have it drain out) that ruined our second floor ceiling and destroyed a closet. Over a year later, we started to see our living room unit leak water profusely. An agent was sent out yesterday to fix it, but lacked a ladder and said he would be back. He never was, and attempts to get someone out here again have been met with bald faced lies - "we have no record of a visit set up." These people do not install these heat pumps correctly. We have had widespread damage to our house as a result of their negligence. Do not use them EVER. Not only is their installation crappy and negligent, but their communication is faulty and suspect. Do not waste your money.

Generally good and reliable. Had some hiccups over the years but we're handled by the management…read moreonce brought to their attention.

Everything and everyone is first rate. Truly the best company to work with. From the service…read moredepartment to the delivery all is great.

Garett was sensational. Not only did he fix my A/C issues he…read morewas fairly priced. One of his competitors quoted me $1100.00 more plus they said I needed a fan motor. Turns out my fan motor is working just fine. Bottom line is Garett & Coastal HVAC is a solid 10* company!!!

Garret is the absolute best. He has been servicing our HVAC since we moved into our home four years…read moreago. We have lost heat in the dead of winter two or three separate times - with an infant in the house. I texted Garret in the middle of the night, on a weekend and he came the very next day to check it out and get us back up and running. He is so knowledgeable and passionate, and always happy to explain everything going on. We are so grateful for his expertise! Garret is extremely responsive on text, he has talked me through issues over the phone, and I just can't say enough good things. If you have any heating or cooling needs, he is your guy!