HVAC Services in Decatur, AL – Heating and Air Conditioning Repair & Installation

Heating and Air Conditioning installation and maintenance in Decatur, AL and beyond.

We are a locally-owned, family-run business for over 12 years!

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HVAC financing options in Decatur, AL
Mitsubishi Electric Diamond Dealer - ductless HVAC systems
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HVAC, AIR CONDITIONING & HEATING INSTALL & REPAIR SERVICES IN DECATUR AL & BEYOND

GET COMFORTABLE, START CONTROLLING THE CLIMATE IN YOUR RESIDENTIAL, COMMERCIAL OR INDUSTRIAL SPACES TODAY.

Whether it’s a sweltering Alabama summer or a cold snap in January, you deserve reliable heating and air conditioning that just works. Southeastern Mechanical Services provides HVAC installation, repair, and maintenance for homes, businesses, and industrial facilities across the Decatur, AL area. As a TVA Quality Contractor Network member, we offer access to EnergyRight rebates and financing options that can save you real money on new equipment.

We are Licensed, Bonded and Insured.

Call us at 256-686-3444 or Contact Us Here for your free estimate.

A Top-Rated HVAC Company in Decatur, AL

We built our name in North Alabama the only way that lasts, one honest job at a time. Homeowners and businesses across Decatur, Athens, Hartselle, and the surrounding communities keep calling us back, and they send their neighbors our way, because we show up when we say we will, we quote straight, and we stand behind the work.

You do not have to take our word for it. Here is what your neighbors have to say:

Southeastern Mechanical Services, LLC place picture
4.9
Based on 92 reviews
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Chelsea Bartee profile picture
Chelsea Bartee
1 month ago
Shane has been AMAZING and gone above and beyond for us with our residential ac issues. They are a great company as a whole - from the techs all the way to the boss. Fast response and most importantly honest service! We highly recommend them!!!
Patti White profile picture
Patti White
2 months ago
Hannah Garnett profile picture
Hannah Garnett
2 months ago
Shane and his crew are extremely reliable and kind! Great communication! They repaired an older unit for us and installed a new HVAC unit, and I could not be more pleased. I highly recommend them to anyone needing any HVAC services
Joey Terry profile picture
Joey Terry
1 year ago
I had an instant emergency where my ac went down suddenly overnight and I called SMS to come check things out, well long story short I have a duel stage, 20seer unit that's had a few years on it, but I thought it was repairable and so ADAM (greatest tech I've ever had the privilege to work on my various ac systems thru the years) worked very hard trying to diagnosis thoroughly as to what my issues could be, every scenario possible was checked thoroughly and as he was finally hoping to leave me with ac he was gonna bypass my control board forcing things to work manually, nevertheless, as he had already tried everything to no avail, and so as he was tracing the low pressure switch wires to bypass the computer board he discovered the wires going to the low pressure switch had been chewed into by a rat or some other critter and
WA-LA, he found the problem, re-wired things and system ran flawlessly... Thank God for Alex cause 99% of technicians would have never had the tenacity and dedication to continue digging wanting to find and fix issues such as mine. Alex is a Godly man and I sincerely believe the Lord Jesus Christ sent him to me to solve my issues where another company told me a proper repair would be a new unit at 20K...God works in miraculous ways and I truly belive GOD sent Adam to solve my repair issues. THANK YOU LORD JESUS FOR SMS & ADAM...
THANKS A MILLION IN ADVANCE AND
A VERY SPECIAL THANKS TO ADAM. GOD BLESS YOU SIR...
JTERRY ❤️💯🙏✝️
Earl Willard profile picture
Earl Willard
1 year ago
I called Southeastern Mechanical Services today around 2pm because I was having an issue with my AC not working and they came right out and fixed the issue! Andy, who was the tech, was amazing! So professional! Very easy to talk to and he was very informative about what the problem was and how he fixed it! I am going to use this Company for ALL of my AC needs!!! Check them out! WOW
H B profile picture
H B
2 years ago
SMS has gone above and beyond servicing our church units. They respond quickly and are extremely accommodating with scheduling around having a staff members being present - which can be tough at a church. Their techs are all CERTIFIED which is extremely rare and difficult to find. Their guys have all been extremely respectful, friendly and knowledgeable.

Southeastern Mechanical Services had competitive pricing compared to larger companies we received bids from and are careful to make sure they don't sell us something we don’t need but thoroughly explain issues we have had.

They always make sure to give us all the options on how to proceed and their professional recommendation isn’t always the one with the largest dollar amount attached to it. Thank you SMS for your dedication to your customers, service and to your community! I respect you guys as a company and as individuals. I appreciate all you do not just for us but for what we see your company do in the community also. I love being able to hire a locally owned business that does GREAT work.
Kieron Butler profile picture
Kieron Butler
2 years ago
An outstanding experience with SMS. My old system was unreliable at best and needed to be replaced.I Contacted SMS, who gave me a very reasonable and detailed quote. I decided to have the entire HVAC system replaced. They scheduled me in and got the work done. The install crew was top notch, hard working and took their time to do it right. I couldn’t ask for better. This company goes above and beyond to ensure the best quality work is done. I highly recommend SMS.
Madalyn Morgan profile picture
Madalyn Morgan
4 years ago
Friendly and very professional staff! I have used them for my home and work office and will always use SMS in the future!
Karen Nelson profile picture
Karen Nelson
4 years ago
We were on vacation and our unit quit. They did an emergency call and by bedtime our house was super cool. In September we had to have a new unit. Shane came out discussed our options and personally went to pick it up and brought it out the next morning. He oversaw the installation. All of the employees are courteous and professional anytime they come out.
Ben Myers profile picture
Ben Myers
4 years ago
I built a small garage and needed a Heat and Air unit for it. I decided on a Mitsubishi mini split system and called about 5 dealers in my area. Not only was Shane the most knowledgeable about them he by far had the best price. He was very professional along with his staff. Lyn was always pleasant to speak to when calling the office. His crew was very fast and did a great job installing my unit. I thought I needed a 18,000 BTU unit and Shane assured me that a 12,000 BTU unit would be sufficient. He was correct, this thing cools my garage in no time and is very quiet. Knowing that I had a Mitsubishi Diamond dealer install my unit and getting a 12 year warranty gives me a great peace of mind. My hat is off to Southeastern Mechanical Service. I highly recommend them.

Credentials you can count on:

  • Mitsubishi Elite Diamond Contractor, the top tier of Mitsubishi’s contractor program
  • BBB Accredited business
  • EPA Certified and fully licensed in the state of Alabama
  • TVA Quality Contractor Network member

When you want it done right the first time, reach out for a free consultation or call us at 256-686-3444. We answer 24/7 for emergencies.

“Demand The Best, Call SMS!”

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A.M.P. UP YOUR HVAC SERVICES WITH THE NEW ADVANTAGE MAINTENANCE PLAN

Sign up today and receive:

  • No overtime charges on service requests
  • 15% OFF on all repair parts
  • Priority service scheduling (over non-member service requests)
  • FREE 1-year membership when SMS upgrades covered equipment

Trusted HVAC Repairs & Maintenance in North Alabama

When your heating or AC system breaks down in Decatur, you need it fixed fast and you need it fixed right. At SMS, we diagnose the actual problem before recommending a solution. If a repair makes more sense than a replacement, we will tell you that honestly. Our factory-trained technicians service all major brands including Rheem, Trane, York, American Standard, Lennox, and Mitsubishi systems.

We also offer preventative maintenance through our Advantage Maintenance Plan to catch small issues before they turn into expensive emergency calls.

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Free HVAC Estimates for Decatur, Athens, Hartselle & Surrounding Areas

We provide free estimates on all residential, commercial, and industrial HVAC work throughout the Decatur area and North Alabama. Heating and Cooling: air conditioning units, furnaces, heat pumps, ductless mini-splits, electric heating, and more. Maintenance and Repair: scheduled tune-ups, emergency repairs, coil cleaning, freon leak detection, and our AMP maintenance plan. Specialty Services: air purification systems, ventilation, and thermostats.

FREE in-home and business consultations. Call today, 256-686-3444, or visit our Emergency HVAC Service page for after-hours help.

Heating and Cooling from Top Brands – Rheem, Trane, York, Lennox & More

HVAC in Decatur, AL

Trusted HVAC Service Team Serving All of North Alabama

We service all of Northern AL. Learn more about our heating and cooling services.

Demand the Best, Call SMS

24/7 Live Customer Service Line

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GET FREE ESTIMATES ON ALL YOUR QUALITY HVAC WORK

Or Call 256-686-3444

24/7 Live Customer Service Line