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(508) 771-2768


Providing Superior Service to Cape Cod Families

For Over 30 Years.

When it comes to residential services, we cover everything that matters including HVAC, heat pumps, plumbing, boilers, water heaters, generators, and much more!

Ask us about how to qualify for a $2,000 tax credit for a heat pump – LEARN MORE

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Air Conditioning



Oil to Gas


Building a Business for the Community

To Be Proud Of.



We pride ourselves on our ethical practices. Honesty and respect are at the core of our values.



We hold ourselves to the top degree of excellence. We proudly provide our customers with top quality service and equipment every time.



We are not here to practice. You can depend on us to do the job right the first time and to be there for you when you need us.



When we come out for a repair or installation, you can rest assured your job was done with precision and care, getting you back to normal quality with a job that will last.


Local Experts.

Our team of professionals are licensed, insured, and reputably trained to work on all makes and models of HVAC equipment. Trust us to diagnose and find solutions to solve the problem with expert repairs, maintenance, and quality workmanship.

We offer repairs, installations, and much more. Our certified contractors strive to offer cost-effective solutions so that you can relax with peace of mind and maximum comfort to enjoy more of beautiful Cape Cod life.

Ask a Question About Us

We Service & Repair All HVAC Makes & Models

We’re Not Here to Practice.

When you’re looking for the best HVAC services in town, give us a call at (508) 771-2768! We exclusively install reputable brands like American Standard, Mitsubishi Electric Heating & Air Conditioning, Navien, Bosch, Honeywell, AprilAire, Carrier, Lochinvar, Generac and more.

When you hire us, you can rely on our team of professionals to always do the job right the first time. Make sure to ask about our maintenance plans so you can enjoy huge savings while keeping your HVAC system running efficiently and effectively.

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American Standard logo

Mitsubishi Electric Heating & Air Conditioning

American Standard Hvac Products

Making Cape Cod homes

Safer & Smarter.

Whether you’re looking to upgrade your home’s HVAC system, invest in a smart thermostat, or you’re just looking for help getting your property up to code, Seaside Gas is here for you.

WiFi Thermostats Indoor Air Quality

Whole-Home Generator Installation

Keepin’ the Lights On.

Don’t let blackouts impact your home. With our generators, we’ll make sure you never skip a beat.

Generators Financing Options

Generac Guardian 24kw Generator

We Proudly Install

Clean Gas.

Learn more about natural gas when you give us a call. We’re here to answer your questions.

Gas Lines Gas Conversions

Proudly Serving Cape Cod

Local Businesses.

Seaside Gas is proud to serve local businesses with expert HVAC and gas services throughout Cape Cod.

Commercial HVAC Large Boilers

Mitsubishi Electric Heating & Air Conditioning commercial unit

5-Star Service.

Read More Leave a Review

The system works great, is very efficient (low operational cost) and he did an outstanding job installing. He’s very quick to respond to all inquiries. Go with him – you will be VERY happy!

Sam D.

He was professional and courteous. Will definitely call them the next time we need anything heat or AC related. Great service!


Kevin and his experienced team installed a ductless air conditioning system in my Chatham home with a challenging layout. System was very well designed, installation neat and hidden and operates very well at low cost. Highly recommended.

Robert O.

They were prompt, always courteous and did great work including addressing problems from the original work by the builder. I would highly recommend them.

Arthur T.

Highly recommend Kevin and his team!

Patricia V.

Kevin and the staff at Seaside Gas are phenomenal. Always responsive, tremendous service and get the job done right. I can’t recommend them enough.

Ryan O.

My whole family thanks you and appreciates the hard work and quick responses. We will highly recommend Seaside Gas and will use them for all future work.

Kirby J.

Furnace Service, Heat Pump Installation, Ductless HVAC, HVAC Repair & AC Installation Barnstable, MA, Dennis, MA, Sandwich, MA & Yarmouth, MA

AC Repair Barnstable, MA | Furnace Service Dennis, MA | HVAC Installation Sandwich, MA

Furnace MaintenanceHeater InstallationAir Conditioning ServiceAC RepairHVAC Installation ∴ Sandwich, MA ∴ Barnstable, MA ∴ Dennis, MA

Air Conditioning Service

HVAC Installation

AC Repair

Furnace Maintenance

Heater Installation

Yarmouth, MA

Sandwich, MA

Dennis, MA

Barnstable, MA