Expert HVAC Services for Plymouth & South Shore Homes
Your Trusted HVAC Partner
Certified Technicians
All work performed by NATE-certified, factory-authorized HVAC technicians.
Timely Service
We respond ASAP and do our best to take care of our customers immediately.
Transparent Pricing
We quote before we work. No hidden fees, no surprise charges on your final invoice.
Comprehensive Warranty
Backed by manufacturer warranties and our own labor guarantee on all installations.
100% Satisfaction Guarantee
We're not done until you're completely satisfied with the work we've delivered.
Factory-Authorized Dealer
We are certified to install Mitsubishi Electric, as well as other top HVAC brands and styles.
Licensed & Certified Professional
HVAC Services We Provide
Bay State handles every aspect of home comfort for Plymouth and South Shore homeowners.
Heat Pump Installation & Design
Energy-efficient heating and cooling in one system. We design, install, and commission heat pumps sized perfectly for your home.
Learn MoreDual-Fuel System Installation
Combine a heat pump with a gas furnace for ultimate efficiency and reliability in all weather conditions.
Request a QuoteAir Conditioning Repair & Installation
Stay cool all summer. We service all major AC brands and install new systems with a focus on efficiency and comfort.
Schedule AC ServiceFurnace Repair & Installation
Keep warm all winter with reliable furnace service. We repair all brands and install new high-efficiency systems.
Schedule Furnace ServiceHVAC Maintenance Plans
Prevent breakdowns before they happen. Annual tune-ups, priority scheduling, and 15% repair discounts.
View Maintenance PlansIndoor Air Quality
Breathe easier with whole-home air purification, humidity control, and ventilation solutions.
Learn MoreSigns Your HVAC System Needs Attention
What HVAC Customers Say
Hundreds of South Shore homeowners trust Bay State for heating and cooling.
I cannot recommend Jay and his team highly enough. The quality of their work was outstanding. Communication and professionalism was excellent.
Excellent service. Jason is an excellent technician. He was determined to get to the root of the problem and he did. He fixed our AC and saved us a lot of money in the process. I highly recommend him.
We have an old AC system that we’re not ready to replace yet… Jason has been amazing at keeping it going and keeping us cool this summer. Very quick to react, very professional, efficient and reasonably priced. Highly recommend!