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Business ProfileHVAC Companies in Decatur, Alabama

Southeastern Mechanical Services, LLC

Taking Calls in Decatur Today 4.90 (92 reviews)(256) 686-3444

Southeastern Mechanical Services, LLC

Southeastern Mechanical Services, LLC is an HVAC contractor based in Decatur, Alabama. It installs, repairs and maintains heating and air-conditioning systems for residential, commercial and industrial properties. The company also offers an emergency HVAC line around the clock.

Last Updated October 2, 2026.

Business Highlights
  • It is locally owned and family-run.
  • It is licensed, bonded and insured.
  • It is EPA-certified, factory-trained and authorized.
  • Its Alabama certification is 06219.
  • It is a TVA Quality Contractor Network member.
  • It is a Mitsubishi Elite Diamond Contractor.
  • It is a York Certified Comfort Expert.
  • It promises a free service call if it cannot get an emergency system running or provide a temporary solution within two hours of arrival.

Service Area

Decatur, Athens and Hartselle, as well as surrounding communities across North Alabama.

Local Business Taking Calls

Southeastern Mechanical Services, LLC is one of 7 HVAC companies ProsGrade lists in Decatur, Alabama.

Taking Calls
Taking calls through ProsGrade
Listing details

10 services listed, including Air-conditioning repair and installation, Heating and furnace repair and installation and HVAC maintenance. Open 24 hours, 7 days a week. Rated 4.9 from 92 reviews.

  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

How Southeastern Mechanical Services, LLC compares with the other 6 HVAC companies on ProsGrade in Decatur, using public Google ratings and review counts.

  • Rated 4.9 on Google, at or above the 4.8 average of other Decatur HVAC companies on ProsGrade.
  • Has more Google reviews (92) than 4 of the 6 other Decatur HVAC companies on ProsGrade.
  • One of 5 Decatur HVAC companies on ProsGrade rated 4.7 or higher from at least 10 reviews.

Services Covered

10 services
  • Air-conditioning repair and installationCentral, ductless and split-system units.
  • Heating and furnace repair and installationFurnaces, heat pumps and electric heating systems.
  • HVAC maintenanceScheduled tune-ups and the Advantage Maintenance Plan.
  • Air purification systems
  • Ventilation systems
  • Thermostats
  • Commercial refrigeration systemsRefrigeration controls, ice machines and walk-in freezers.
  • CNC oil cooler and chiller service
  • Pool heaters
  • Geothermal systems

Reviews

What customers say

Customers praise quick responses and professional, informative technicians. A customer who had a full HVAC system replaced praised the crew for taking its time and doing the job carefully. One customer reports repeated calls about a Freon leak in a system the company had installed; the leak remained unfixed, and a promised return visit did not happen.

Customer Reviews

Earl Willard

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
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H B

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.
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Ken Whisenant

With SMS this experience could have been a horror story. They responded very quickly with the right unit, the right price, the right crew, the right results. For an emergency or regular need for service on AC issues, we would recommend these folks quickly. Friendly, professional, punctual, skilled, and keeps you informed on progress.
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Kieron Butler

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.
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Katherine woods

my hvac system which they put in by the way, stopped working in February, I’ve called them 5 times since then to fix the Freon leak. It’s 76 degrees in my house right now after he told me in august he’d be back to fix it on the following Monday I didn’t have to be here. Well apparently he didn’t come back and fix the leak. Also they told me 2 months ago that they couldn’t come out because they were booked up for two weeks, that call another HVAC company which I did. He told me it had a leak he put 4 pounds of Freon in it. Then they told me the guy that worked on my unit in February had quit. They are now saying they are booked up again for 2 weeks. Well I ask her in July 3 times to set up a maintenance plan and they could come back this month to clean the unit before cold sets in. She never set it up,
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Frequently Asked Questions

How does Southeastern Mechanical Services handle after-hours emergency calls?

After hours, calls go to a live answering service. It gets agreement on the emergency service fee before a technician calls back to arrange a visit.

Does Southeastern Mechanical Services offer HVAC financing?

Yes. Financing options are available through GoodLeap and TVA EnergyRight.