Average homeowner savings
Stars on Google
Total installations
Metric tons of C02 saved

Replacing your HVAC system doesn’t have to be a nightmare. Here’s how we’re making things more efficient–for you and the planet.

Working with us is a breeze.

HVAC installation contractor company in Massachusetts for AC systems, furnaces, boilers and hot water heaters
Other contractors require constant management so they don’t disappear or go over budget.
We manage everything from estimate to installation. Tetra’s on top of the job so you don’t have to be.
Other contractors leave you feeling uncertain, taking weeks to respond, or ignoring you completely.
With Tetra, you get a team you can contact any time. We’ll never give you the cold shoulder.

Stress-free every step of the way

Answer a few questions and we’ll send you a detailed estimate right away.
Review your estimate virtually with a heating and cooling expert.
Choose your system and an installation date that works for you.
Answer the door on installation day. We’ll manage everything else.
“I had a ductless mini split installed.  Very professional, responsive, excellent quality, and exceptional price.  Half the costs of all other bids I got for the job.”
Jack O.
Springfield, MA
mapBuderus (Bosch) and Well-Mclain boilers - buy online for installation in Massachusetts
“I had a ductless mini split installed.  Very professional, responsive, excellent quality, and exceptional price.  Half the costs of all other bids I got for the job.”
Jack O.
Springfield, MA

No ghosting, guaranteed

Our trusted installers show up on time, do top-quality work, and don’t leave until you’re completely satisfied.

rectanglehvac installer

Boiler Installer in Plymouth

rectangleHVAC technician

Furnace installer in North Andover

rectangleHVAC technician

Mini split installer in Brockton

rectangleHVAC technician

Boiler specialist in Boston


Boiler Installer in Plymouth


Zero hidden fees

We lock in your price upfront so you know exactly what you'll pay on installation day—no surprises, no exceptions.

“I was skeptical at first when I saw the price, but there were no catches at all. Very high quality work and excellent customer service.”
Steve C.
Waltham, MA

You’ll never overpay.

Markups, sales fees, and other costs mean you pay more than you should.
We charge up to $4K less than others with wholesale pricing, exclusive discounts, and zero markups or extra fees.
Other contractors leave you to figure out financing on your own.
We’ll help you set up a payment plan that works for your budget.

High quality comes standard.

HVAC installers performing heating and cooling system replacement ordered online with Tetrarectangle
“Tetra’s crew was very respectful and did high-quality work during the gas boiler job. They left my house spotless, too.”
Hillary K.
Brockton, MA
Other contractors install lower-quality parts to save money, leading to costly fixes down the line.
We only install what we’d use in our own homes. Rest assured your system will last for years.
Other contractors cut corners to get the job done faster.
We firmly believe in done right, not done fast. We’re finished when you’re 100% happy.

Save money, save the planet

Installing an energy-efficient air conditioner can have a big impact on your monthly energy bill. Homeowners who opt for energy efficient models report savings of 25% or higher.

By choosing high-efficiency appliances, you're also doing your part to fight climate change. Replacing your old air conditioner is almost as effective as giving up your car!

Installing energy-efficient air conditioners and high-efficiency appliances reduces energy bills to help the environmentrectangle

Your purchase is completely covered by us

What is

Fully Covered™

by Tetra?

Upgrading your heating & cooling system is a major investment. We take that seriously. By only using the best equipment and highest quality contractors we can guarantee the system will just work for the next 10 years.

Instead of fussing around with what’s covered, what’s not, what does a visit cost – we’re gonna save you the headache.

We’re gonna take care of your system for you.
We’re gonna cover everything for 10 years.
And it’s not gonna cost you a penny extra.

No guessing, no ghosting, no annual payment plans, and no upselling during visits. We believe in the equipment we’re selling and our incredible install partners so much, we’re willing to eat the cost if anything goes wrong.

No nonsense. Just great equipment that we’ll keep in tip-top shape. That’s Fully Covered️ by Tetra.

Find the right Fully Covered️™ by Tetra equipment for your home
Get Started
Compare the cost of a Fully Covered™ by Tetra system vs other national service companies
Fully Covered™️ by Tetra
The other guys

10 years of guaranteed performance
1 year, labor only If something breaks, you foot the bill to fix the parts.
All included, tune-ups, repairs, everything
Something happens on day 366, that’s on you
We’ll know if there’s an issue before you do
Tune-ups included
$100-$200 just to take a look
$0 extra

Replacing your HVAC system really can be painless.

Ready to get started?

Frequently asked questions

Who is doing the installation?

When will you install my system?

What if you missed something? Will I be charged extra if something unexpected happens on installation day?

You haven’t been to my house. How do you know what I need?

How much does it cost to run the system on a monthly basis?