What We Do

We are New England’s leading HVAC contractor for Residential Heating and Cooling and Commercial HVAC systems.


Find out how Mitsubishi Electric ductless can transform your living space.



Learn how ductless can keep any commercial space comfortable.


Where We Do It

From Tudors to Colonials to split-level homes and more, we’ve installed ductless HVAC systems in all types of single-family homes, condos, brownstones and apartments in and around the Boston area.

Hear From Our Satisfied Customers:

Featured Services

We are the largest ductless contractor in New England with hundreds of ductless system installations.

N.E.T.R. Inc., in-house staff of certified HVAC/R technicians can install, service and repair your commercial refrigeration systems.

Maintenance Programs

Our highly trained HVAC technicians can maintain, tune up and/or repair your current system, so you can stay warm in the winter and cool in the summer. No sweat, No stress. An HVAC preventative maintenance ensures healthier air, fewer emergencies and a long-lasting system.

HVAC Insights

Explore our Heating and Cooling articles. Make sure to come back soon for more resources as you learn the best ways to heat and cool your home.

Indoor Humidity

Why Isn’t My AC Controlling Indoor Humidity Anymore?

Learn why your air conditioner might not be handling the humidity inside your home well. Find out who to call for trustworthy HVAC repair & ...
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ductless air conditioner

Top 10 Start-of-Season AC Problems

Discover the most common start-of-season air conditioner problems. Find out how to get help making sure your AC is in top shape for spring and ...
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Indoor Air Quality

How to Keep the Coronavirus Out of Your Home

Learn how to keep your home safer from the Coronavirus. Get help ensuring your indoor air is as healthy and clean as possible with N.E.T.R., ...
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Furnace Problems

Top 9 Most Frustrating Furnace Problems (and Their Fixes)

Discover the most common issues with furnaces and what you can do to fix them as quickly as possible. Get help from an experienced HVAC ...
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Responding to the Coronavirus Pandemic

How N.E.T.R., Inc. Is Responding to the Coronavirus Pandemic

At N.E.T.R., Inc., we’re taking the spread of the coronavirus pandemic and COVID-19 very seriously. Although this is a time of great uncertainty for our ...
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How Does Coronavirus Spread Through HVAC Systems?

How Does Coronavirus Spread Through HVAC Systems?

America has been battling COVID-19 for nearly a year now and cases are continuing to rise. Lockdowns and pandemic restrictions are wearing on the nation, ...
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Schedule an Emergency Service

We will provide you to with installation, repair or maintenance services that you require, all while providing excellent service.