Main Stream Mechanical

Business Details

30 Years

experience

Emergency

services

Your Trusted HVAC & Plumbing Experts in Massachusetts & New Hampshire

Main Stream Mechanical has been serving Massachusetts and New Hampshire since 1996 with comprehensive HVAC and plumbing solutions. Our team combines over 60 years of collective experience with ongoing technical training to deliver high-efficiency installations, repairs, and maintenance. As a Mitsubishi Elite Diamond Contractor, we offer industry-leading warranties and specialized expertise in oil-to-gas conversions, ductless systems, and emergency services. Our licensed Master and Journeyman Plumbers ensure prompt, professional service with same-day parts availability. Operating 24/7 with fully stocked vehicles, we prioritize customer satisfaction through transparent communication and meticulous workmanship.

Our technicians receive continuous product-specific training to maintain proficiency with all installed equipment brands. We maintain active partnerships with Mass Save and National Grid to provide energy-efficient solutions and financing options. With service areas spanning two states and decades of local market knowledge, we combine technical excellence with personalized service. Our commitment to quality is demonstrated through numerous customer testimonials highlighting reliability, expertise, and emergency responsiveness. Backed by industry certifications and manufacturer partnerships, we deliver trusted home comfort solutions for residential clients.

Services

Heating Installation Mini-Split Systems Emergency Repairs Plumbing Services Boiler Maintenance Ductless AC Oil Conversion Annual Maintenance

Details

Year established: 1996

Highlights and features

Serving MA & NH with 25+ years of combined technician experience
Mitsubishi Elite Diamond Contractor with extended factory warranties
24/7 emergency service for urgent heating and plumbing needs
Specialized expertise in oil-to-gas conversions and energy rebates
Licensed Master Plumbers with same-day parts availability

What people say

Excellent service Knowledgeable technicians Prompt response Highly recommend Professional and courteous

Website

Update Listing

Services

Heating Installation

We specialize in complete heating system installations for both gas and oil systems. Our certified technicians handle furnace and boiler replacements with precision, ensuring proper sizing and efficiency. Customers benefit from our Mass Save program partnerships and oil-to-gas conversion expertise, with financing options available to accommodate different budgets.

Mini-Split Systems

Our Mitsubishi mini-split solutions provide year-round comfort without requiring ductwork. These energy-efficient systems work for both heating and cooling applications, ideal for home additions or older properties. As an Elite Diamond Contractor, we offer extended factory warranties and expert placement for optimal performance in any living space.

Emergency Repairs

We provide urgent HVAC and plumbing repairs with 24/7 availability. Our fully stocked service vehicles enable quick fixes for frozen pipes, furnace failures, and water heater emergencies. Technicians respond promptly to critical situations, with multiple testimonials highlighting our reliability during after-hours emergencies across Massachusetts and New Hampshire.

Plumbing Services

Our licensed plumbers handle residential plumbing needs including fixture installation, pipe repairs, and water heater replacements. We maintain Master and Journeyman certifications with specialized training in modern plumbing systems. Emergency plumbing services address burst pipes and other urgent issues with rapid response times, as demonstrated in customer testimonials.

Oil Conversion

We facilitate complete oil-to-gas heating system conversions with expert guidance through energy rebate programs. Our technicians manage the entire transition process, from initial assessment to final installation. Customers receive assistance with Mass Save HEAT program applications and financing options, ensuring a seamless switch to more efficient gas systems.

People

David

Technician

Experienced HVAC technician known for expert furnace diagnostics and safety inspections. Recognized for identifying critical system issues that prevent potential hazards, providing clear explanations of repair needs to homeowners.

Nick

Service Technician

Certified HVAC specialist with expertise in system evaluations and energy efficiency recommendations. Provides personalized consultations about replacement options and helps customers navigate Mass Save program requirements with professional guidance.

Brenda

Customer Service

Dedicated service coordinator known for responsive communication and scheduling flexibility. Manages customer inquiries with professionalism, ensuring timely service appointments and coordinating complex installation timelines to meet client availability.

Eric

Estimator

Experienced project estimator who provides accurate cost assessments for heating system replacements. Communicates technical details clearly to customers, offering expert advice on system selection and energy-saving options during initial consultations.

Reef

Installation Technician

Skilled installation specialist recognized for meticulous workmanship and attention to detail. Completes furnace and boiler replacements with precision, maintaining clean workspaces and ensuring proper system operation during all weather conditions.

Questions

What HVAC services do you offer in Massachusetts and New Hampshire?

We provide complete heating, cooling, and plumbing services including installations, repairs, and maintenance for residential properties across both states.

Do you offer emergency heating repair services?

Yes, our 24/7 emergency service responds to urgent HVAC and plumbing issues with prompt technician dispatch and rapid problem resolution.

Can you help with oil-to-gas heating conversions?

We specialize in complete oil-to-gas conversions with expert guidance through Mass Save rebates and financing options for seamless transitions.

Are financing options available for HVAC installations?

Yes, we offer third-party financing programs to help customers manage the cost of new heating and cooling system installations.

What makes you a Mitsubishi Diamond Contractor?

Our elite status reflects specialized training, high service standards, and extended factory warranties on Mitsubishi mini-split systems we install.

How quickly can you respond to plumbing emergencies?

Our emergency plumbers typically respond within hours for burst pipes and critical leaks, with technicians strategically located across service areas.

Reviews (6)

Write a Review

Ryan Geary

May 30, 2022 Report

I had a plumbing issue that could have turned into a real nightmare, real quick. I contacted John and he set me up with someone who came out and stopped a leak almost immediately and probably saved my ceiling. The price was incredibly reasonable also. Fast forward a couple months my mini split system stopped working so I reached out to John again and within days they had come out, diagnosed the problem, ordered the parts, and repaired the entire system. Couldn't give any higher praise to this business if I tried, they're super fast, highly efficient, and everyone who works for them are genuinely nice people.

Elisa K.

May 09, 2022 Report

The office staff is friendly and helpful, and the technicians always throughly explain their findings and answer any questions I may have. Great service! Service: Heating system repair

Oom Developers

Mar 02, 2022 Report

The serviceman was efficient and tidy. He performed the yearly maintenance service on our heating system and answered our questions in detail. Great work. Service: Heating system maintenance

Bethany Silva

Jan 18, 2022 Report

I had a great experience with Main Stream Mechanical with our removal of our old oil boiler and installation of our new gas boiler and water tank. Eric was great in providing all of the information needed when he came to provide a quote and answered all my questions. We had to deal with National Grid to get a new gas line, account, and MassSave loan, and though National Grid was a little difficult to work with, Main Stream Mechanical was amazing and very accommodating to National Grid's ever moving schedule.

When National Grid finally had the gas line installed Main Stream's team lead by Nick was professional, courteous and just all around great. They removed all the old oil boiler and installed everything within a few days and cleaned up as if they were never there. Our experience went very well with Main Stream Mechanical and we'll be surely using them in the future!

Jeff Ferrante

Jan 12, 2022 Report

I have used Main Stream for the past 8 years in two different homes. They are responsive, professional, knowledgable, and thorough. I use them for all of my heating, air conditioning and general plumbing needs. Services: A/C system repair, A/C system maintenance, Heating system maintenance

Dave Vincett

Aug 09, 2021 Report

Mainstream Mechanical performed repairs on my central AC system and also on my tankless heat and hot water system. Every touch point from making the appointments to having their Technicians in our home was simple and very pleasant. The entire staff is professional, pleasant and highly efficient. It was a pleasure to do business with them and I would highly them to everyone.