Get matched with top water treatment & purification system installers and replacers in Londonderry, NH

"as advertised"

"Huge shout out to the crew at Main Stream Mechanical. Eric came out, reviewed my current system, and gave me his recommendation for replacing my furnace and hot water heater with a new, energy efficient furnace/hot water heater. Brenda, as always, was a pleasure to deal with. Answered all my emails and calls promptly and gave me all the information I needed in a timely manner. She even went out of her way to register my new furnace and provide me with all the information I needed to apply for my rebate! Nick and Marcus did a great job installing my new furnace/hot water heater. Both were very friendly and professional. Nick answered all my questions, gave me a “tutorial” on the emergency shut off procedure for my new furnace, and did a fantastic job re-plumbing all the lines needed for the install. I highly recommend Main Stream Mechanical for all your HVAC needs."

"Job went as expected and they were able to do the job a day sooner than first communicated which was greatly appreciated."

"Great !!! He shows up when he says. Returns calls. Knows what he is doing. Polite & clean. Does great work at a fair cost."

"Went great highly recommend this company"

"Rob was a pleasure to work with. We had to have a more unusually sized radon mitigation fan replaced. Rob handled sizing and installation and even informed us about the manufacturer warranty for the model. Would definitely use him again. "

"Although my relationship with ARM started a bit rocky, in the end I was very happy with the service provided. After a ARM technician replaced a fan, the noise level in the surrounding rooms increased to a point where I wondered if I could sell the house. I got the impression from the technician who installed the fan and was told by another company's technician there probably wasn't anything I could do. But, Mike G, from ARM, was able to lower the noise to a tolerable level by reducing the vibration from the attached pipe by making small adjustments including re-positioning the fan, removing old clamps and adding foam. He patiently answered all my questions and explained what he was doing throughout the diagnostic. Although the noise problem was resolved, the radon level was still 10.8 pCi/L so ARM returned (with the original technician and Keith to add a second suction point. . I was very happy with their work. The pipes were placed in a way that is an unobtrusive as possible, are securely fastened and as I learned, have the right pitch. Before the installation, Keith explained what they did to determine where they thought the suction point should be, and after must have been a long day for them, made me feel it was important that all my questions were answered. My radon level is now .6 pCi/L! My only complaint is that it takes a long time to get appointments and for two of the visits they were a few hours late.. The cost of service is for the 3 visits which were 11/9/18, 12/26/18, and 1/30/19 and includes the cost of the fan."

"Techs on site did a wonderful job. Note: Get a detailed est. in writing. Happy with tech work. Not happy with business practice."

"Excellent. I called Ferris Plumbing on a Thursday afternoon and left a message. Matt returned my call the next morning. After I explained the problem, Matt said he would try to get to me that day (Friday), but he may not be able to. Meanwhile, he suggested not using that toilet. He called later that day and said he couldn't make it, but would be able to on Monday. He called me on Monday morning to confirm that he would be coming and gave me a estimated time of arrival. Matt wasn't able to come himself, but two of his plumbers arrived mid-morning. I explain all of this because Matt's communication was OUTSTANDING. I always knew the status and I knew he would be arriving as soon as he could. His two plumbers were also excellent and efficient. They replaced the toilet flange and gasket, and remounted the toilet without needing to disturb the downstairs ceiling. I should mention that the toilet is the original installation of 48 years ago. The original gasket was completely disintegrated to the point that only few small fragments of it were left. They were also very careful to protect the carpet just outside the bathroom by placing a drop cloth to protect it. Their service and work was EXCELLENT. We are considering remodeling that bathroom and Ferris Plumbing will certainly be our first choice to do the work. I highly recommend (Matt) Ferris Plumbing."