"Bob inspected the window frames and provided a few solutions I hadn’t considered. Same for interior doors no longer hanging properly. Although I typically prefer paying by the job instead of by the hour, Bob was quite focused on his work and use of time. I will be asking him to return in the spring to complete a few additional repairs and install a storm door."

"Installed a three panel front window. Executed well and very professional staff arrived within timeframe. Pleased with the work done and the end product. Despite some small hiccups they were taken care of same day with no delay. Team was respectful and personable to work with."

"I emailed them photos. They had to order replacement hinges, which took a while. Fixing the door was a two person job. They were very professional."

"Rob Calnan and his team were really great!  After contacting a bunch of contractors that take part in the MassSave program, we decided to go with Calnan Energy Systems because he could do the job much faster and to a higher level of quality.   
They took the time to explain the details of the project at every step of the way.  They have a bunch of ladders and the best equipment so that jobs can be done with maximum efficiency.  When a few open seams in our sheathing allowed cellulose to blow into the house accidentally, they didn't miss a step and cleaned up everything to a level even better than they found it.  These guys work hard all day long, from the moment they arrive to the time they finish cleaning up.  
I can't speak to the direct impact on our utility bills since we moved in a short time ago and we have installed a new high-efficiency boiler just before the winter heating season began.  However, we do notice a *slight* reduction in street noise.  I have also taken some infrared pictures of the house (both inside & out) on a very cold night in January and it's clear that we're sealed up tight!  No missing cavities due to framing cross-members, etc.  They also blew insulation into a few porch overhang cavities as well.
Since the job ended I have called Rob with a few insulation questions and he's been super-helpful.
I would highly recommend Rob and his company!
"

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"Been in the co stir too. And remodeling industry for 25+ years. Great work, professionalism, and attention to detail. 4 shower doors, and glass installed in walk in showers."

"We really like our new windows and sliding glass door. They were very professional and did nice work. Everything looks great!"

"Good Window Works, Inc. gave me an estimate that was close to the amount that I was charged. They came on time and my cracked pane of glass was repaired in a timely manner"

"Michael was the ONLY one who responded to be out of 20 different companies when I had a leak from my living room window during a storm in November. Not only did he respond, he showed up in two days and I got the repair done in 3 weeks that was supposed to be at least 6 weeks. I’m so impressed and grateful at the quality of work and efficiency. Will def be asking Michael to replace all of the rest of our windows!!"

"We contacted the company for an estimate. They were able to schedule one for a week after the phone call. Tony came out and measured all the windows, showed me a sample of the storm windows, and wrote out the quote on the spot. Once we decided to go with Precision, we called and ordered our windows.
   We were told it would take about 2 weeks to manufacture the windows and then they can be installed at any time. It actually took about 3 weeks for the phone call letting us know the windows were ready but that didn't effect anything on our end, so no big deal. We tried to schedule the install for on a few occasions, but each time the weather won out and because of rain the installation had to be delayed.
   Finally, 1 1/2 months after our initial call to the company, we were able to book a clear day to have the work done. We did not need to be home, which was very convenient, so I arrived home to very beautiful new storm windows on the outside of the house! All of the windows are very high quality and compliment the outside of the house nicely. 
   Overall, it was a fantastic experience with a great, family owned company!"