Licensed and insured, we operate in the states of Massachusetts and New Hampshire


Home Heating Systems

Installation, maintenance, and repair services improve the energy efficiency of your home and reduce heating costs. learn more

Air Conditioning

Central AC Systems

Efficient and affordable central air conditioning systems improve indoor air quality and help you beat the heat. learn more


All Your Plumbing Needs

From emergency plumbing services to complete plumbing system renovation and remodeling, we do it all. learn more


We Are Where You Are

Massachusetts and southern New Hampshire residents rely on Main Stream Mechanical. learn more

About Your Plumbing and HVAC Contractors

Heartfelt Testimonials from Happy Customers Across Massachusetts and Southern New Hampshire

I would like to take this opportunity to express my sincerest appreciation to you for making our experience with the new boiler installation so smooth and painless. The whole process was executed so professionally that I must tell you that I was very impressed with each aspect. Thank you for making our home more secure and warmer. I will think of your team on those cold winter nights when we are all toasty in our beds.
A. Ribot Chestnut Hill, MA

I am writing to tell you how very pleased I was dealing with you and your people. Your plumbers were knowledgeable and above all professional, polite, neat, efficient and a pleasure to work with. Thank you all for a most pleasant experience and if you ever need a reference, please feel free to use me.
R. Horan Arlington, MA

We are new gas customers as we just completed the conversion from oil heat to the installation of a new gas system. We want to acknowledge the outstanding job that Main Stream Mechanical did for us. From the minute that Eric came to our house and spoke with us, we were confident that he was knowledgeable and he answered all our questions. When the work crew arrived, they were very polite and professional. All in all, we were very impressed and we would highly recommend this company.
S. & L. Malo Peabody, MA

I wanted to write to tell you and all the folks at Main Stream Mechanical what a wonderful job you did. From my first phone call through the entire process, everyone at Main Stream was professional, courteous and punctual. Thanks to everyone for a great job!
M. Bailey Haverhill, MA

I certainly can see why National Grid recommends you for conversions from oil to gas! Your knowledge of different heating systems and your patience in explaining all that inspired confidence and trust. They say "it takes a village to raise a child" and I was jokingly thinking "it will take a village to convert to gas" and yet, it was seamless. There were inspectors, electricians, oil tank removal men and your technicians who were fantastic. It was one of the colder days of the year and on and on they worked trudging through snow banks on the narrow path I had shoveled from my driveway to my cellar door. Working away in that cold basement until they had finished, leaving me with a beautiful new furnace and zero mess to clean after. I would recommend you to all.
C. Siemering W. Newton, MA

I would like to thank all of you at Main Stream for your prompt response when my pipes froze and then burst. Your competence and professionalism went a long way in making a bad situation tolerable. Thank you!
A. Smyth Seabrook, NH

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