Ductwork Installers in Nashua, NH

"This was a home run for Cornerstone! Incredible service from start to finish! This was a complete Central AC install including installing all new ductwork. Andy & Britt were incredible. They were on time every day, and very personable. The job they did was great but I also appreciated how it looked. They took the time to tie up all the duct tubes so it was tidy and clean looking in the attic. This was a multi-day install, and there was constant communication on the schedule so I always knew when to expect them. The 2 electricians - Rick & Jeremy were the same. Very relatable and personable, on time and professional. They took care of the electrical install and also tidied up some other wiring. Front office was very professional and courteous, and consistently checking in on the job. Incredibly blown away by the amazing job the entire company did! I would recommend them 1000 times over! Great job to everyone!"

"Awesome job. Excellent customer service and install technicians!"

"Customer service is what makes them an excellent company. They are very responsive and always come in and ready to work."

"The team at TJ's HVAC is courteous, professional and very knowledgeable. You can count on the job being done right the first time, and their maintenance program is great. I have had numerous jobs accomplished by them including furnace replacement (upgrade), AC replacement (upgrade), air exchanger/purifier system installed, humidifier installed, water heater replacement, ventilation system/duct cleaning, and house water filter system installed. Their maintenance plan is perfect and maintains all my systems in tip top shape."

"Very pleasant people to work with"

"I hired them to replace a sluggish toilet. Andrew took my call immediately and set a schedule for the next day. He came right on time and did a great job. I will definitely call them again."