Since 1962, we've offered professional heating and cooling installation throughout all of Northwest Indiana.

Since 1962, we've offered professional heating and cooling installation throughout all of Northwest Indiana.

We’re Your Hometown Heating and Cooling Experts

As a family owned and operated business, Gray’s Total Green Energy Solutions, LLC, is Northwestern Indiana and the Chicago Metro’s premier Green Energy HVAC service provider. The heart and spirit of our company is all about doing the job right. But it’s so much more than just the quality of our workmanship. It’s about the comfort, health, and safety of your family. To that end we deliver peace of mind by virtue of everything we do to make the environment of your home as comfortable and healthy as it can possibly be.

Grays Team Spring 2020.
Lynn-Arrow

Here’s Lynn, stopping at nothing to make sure your heating and cooling system is in working order!

“We truly value your business and believe it should be earned the old fashioned way. We’ll be there when you need us for all your heating and cooling needs, charge you a fair and honest price and stand behind our work.”
-Lynn Gray, President

A Letter From the Owner...


My name is Lynn Gray and I am the president of Gray’s Total Green Heating and Cooling, LLC. My Dad had a HVAC business as I was growing up. I remember being in high school and going out on jobs with him as he was teaching me the trade. Back then there was only conventional means of heating and cooling—not like today where there are choices such as geothermal and solar. As the years went by my Dad retired from the business and I started my own.

We’re A Carrier Factory Authorized Dealer

From maintaining a consistent temperature, to helping keep your utility bills cheap, to cleaning and humidifying (or dehumidifying!) your air, Carrier products provide the means to fully manage your home’s heating and cooling quality, all while keeping you and your family comfortable.

GRA-Carrier-Infinity1
CarrierFAD_leaf_large

Our Customers Love Us

See what everyone's saying about Gray's!

Air Conditioner Replacement in Hebron, IN 46341

“I had to put a new fan in my central air. I called one company and all they did was give me the run around. I called Gray' s and Jennifer and Michelle were so very nice and helpful. My serviceman Jakob is the BEST!!! He explained everything to me and before he left he made sure everything was working fine. I will make sure if I have any more problems with my furnace or air I will make sure I call Gray's and I will make sure they send me Jakob!!”
- Mary S.

Air Conditioner Replacement in Hebron, IN 46341

“I had to put a new fan in my central air. I called one company and all they did was give me the run around. I called Gray' s and Jennifer and Michelle were so very nice and helpful. My serviceman Jakob is the BEST!!! He explained everything to me and before he left he made sure everything was working fine. I will make sure if I have any more problems with my furnace or air I will make sure I call Gray's and I will make sure they send me Jakob!!”

- Mary S.

Gas Furnace Repair in Hobart, IN 46342

“Jakob is incredibly professional and knowledgeable. He makes every effort to diagnose issues correctly and resolve them in a cost effective manner. Thanks Jakob for providing us with great service!”

- Raquel-Catherine B.

We love hearing from our customers!
If you've had us work on your HVAC system we would love to hear from you too.

Need HVAC Service?

Contact the experts at Gray's.

Call us at 219-696-8377!

Check Out Our Latest Articles

Fall HVAC Maintenance

Fall HVAC Maintenance

September 17, 2021

As the saying goes, “Time and tide wait for no one.” Whether you’re prepared or not, the summer months and warmer weather are moving aside for fall and cooler temps. That means here in St. John you need to think about preparing your heating, ventilation, and air conditioning (HVAC) system for fall maintenance.

Read More
replace your air filter

Video – Replace Your Air Filter

August 31, 2021

ll catch the particles before they reach your lungs. There’s so much floating in the air our eyes can’t see, and changing your filter as recommended makes all the difference.

Read More
How Does an Air Conditioner Work? Top view of an air conditioner unit outdoors in hot summer season. No people.

How Does an Air Conditioner Work?

August 17, 2021

As a homeowner here in Indiana, it’s always a good idea to learn as much as you can about your appliances. That means knowing their basic operations, what features are included, and if any necessary upkeep is involved. Needless to say, this is no exception for your air conditioning (AC) unit.

Read More