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"Great, as always. Sila is outstanding. We have a service contract with them for our furnace and AC and they keep them in tip-top shape. And when we have an urgent or emergency situation (heating, cooling, plumbing, electrical), they're who we call."

"I hired Merrimack Valley Plumbing to install a boiler in my home, and my experience was overwhelmingly disappointing. While the boiler functions, the installation process and quality of work raised numerous red flags. I want to share my experience to help others make an informed decision when considering this company. Installation Issues Code Violations: The exhaust is less than 3 feet from the gas meter, and the holes drilled in the joists for intake and exhaust are less than 2 inches from the bottom, both of which do not meet code requirements. Improper Venting: Both the exhaust and intake vents are installed too close to the ground (not meeting the 12-inch clearance required for expected snowfall) and are too close to each other (less than the 12-inch separation required). Unsealed Penetration: The hole drilled in the siding was left unsealed, creating a potential entry point for rodents. Condensate Drain Issues: The installed condensate pump is leaking and wasn’t tested. Additionally, rather than a permanent drain installation, they daisy-chained it into a pump for a portable air conditioner. Wiring Errors: The zones for the primary bedroom and second floor were wired backward, causing overheating in both areas. Missing Outdoor Sensor: The outdoor temperature sensor, critical for proper operation, was not installed. No CO Alarm: A carbon monoxide alarm was not installed, which is essential for safety. Unprofessional Workmanship: Trash, including a metal duct pipe, was left in the crawl space near live electrical wires. Process Concerns Permit Delays: The company failed to file permits before starting work. I only discovered this after contacting the town permitting office myself. Mismanagement and Delays: The project stretched far beyond the promised timeline, with repeated excuses about missing parts and limited crew availability, despite prior assurances that the job would be completed in two days. Broken Promises: They claimed a project manager would take measurements in advance to ensure a smooth installation, but no one came. Additionally, they rescheduled initially, promising a larger crew, only to send a single plumber on the first day. Misinformation and Deception Throughout the project, I encountered multiple instances where Merrimack Valley Plumbing provided misleading or false information: - They lied about the dates permits were filed. - They claimed delivery issues caused delays, though they should have anticipated these based on the advance photos provided. - They repeatedly shifted blame rather than taking accountability for the delays and issues. Overall Experience While the boiler itself works, the installation was riddled with code violations, safety oversights, and poor workmanship. Additionally, the company’s lack of transparency and repeated dishonesty made an already frustrating situation worse. I would not recommend Merrimack Valley Plumbing to others. Their lack of professionalism, disregard for safety codes, and failure to take responsibility for their mistakes created an unnecessarily stressful and costly experience."

"It went really well, Sean was very helpful and did the job quickly. He was tied up on another job for a while but once he got to our house, he removed the concrete steps quickly and efficiently."

"I used Kyle today for maintenance on our HVAC and my dad's ductless and radiant systems. Was here about 6 hours. Incredibly friendly and thorough. Explained everything in detail. Will have them back next time for sure. TY Kyle!"

"We purchased our house back in late April 2021. During the inspection process, we found a leak above the garage. Southern New Hampshire Plumbing and Heating was hired to fix the leak. Eric from Southern New Hampshire Plumbing and Heating came out on April 23rd 2021 to fix the leak above our garage. Turns out there was a water pipe that was punctured by contractors from when they nailed in baseboards in the laundry room above our garage. Fixing this required cutting a hole in the wall to get to the punctured pipe. When Eric fixed the pipe, we believed the problem was fixed, however now, 3 months later, we are noticing there is leaking again in the exact same spot. We called the company, as they claim they warranty their work for 12 months, and they are refusing to fix their work because “the property was technically sold after the work was done”. Even though the work was done FOR THE SALE, as PART OF THE TERMS OF THE PURCHASE AND SALE ON THE HOUSE. PLEASE take caution before hiring this company. Clearly their work doesn’t hold up, and they don’t honor their work like they claim to."

"Excel Mechanical installed a gas furnace, evaporator coil and heat pump on 06/18/2025. The installers were professional and completed the project in one day. Our contract stated that the installer Excel Mechanical would file the necessary documentation in order for us to receive a rebate of $4635.42 from Mass Save for the heat pump. Since the installation in June multiple phone calls and texts to manager Josh Caplan and office staff went unanswered regarding the status of the Mass Save rebate. As of today 10/12/2025 the rebate form with Mass Save has not been completed by Excel Mechanical. I would file the rebate myself but Excel Mechanical did not supply me with the proper documents to do so. It has been very frustrating and time consuming trying to communicate with Excel Mechanical regarding this Mass Save rebate."