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AGL Heating & Air AGL Heating & Air
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22 Years
experience
Emergency
services
Your Trusted HVAC Partner in Charleston, SC
Since 2004, AGL Heating & Air has been dedicated to providing Charleston and surrounding communities with honest, high-quality HVAC solutions. Our team of certified technicians brings over 100 years of combined experience in heating, air conditioning, and indoor air quality services, including installation, maintenance, and repair. We prioritize integrity and customer satisfaction, offering industry-leading products from trusted brands like Trane and WaterFurnace. Our commitment to excellence extends to geothermal systems, ductwork, and air filtration solutions, ensuring energy efficiency and comfort for residential and commercial clients.

With a focus on local needs, we serve areas including Downtown Charleston, Mount Pleasant, and Kiawah Island. Backed by five-star reviews, we guarantee satisfaction through prompt service, professional expertise, and transparent communication. Special financing options and a 15% discount for first-time customers reflect our dedication to accessible, reliable solutions. As a locally-owned business, we take pride in supporting charitable causes and maintaining our reputation as a trusted HVAC partner.
Services
AC Repairs AC Maintenance Heating Repairs Heat Pumps Indoor Air Quality Duct Repair Geothermal Systems Trane Products Air Filtration Emergency Services
Details
  • Year established: 2004
Highlights and features
  • We offer 100+ years of combined HVAC experience.
  • Our team are certified Trane Comfort Specialists.
  • Satisfaction guaranteed with prompt, professional service.
  • Special 48-month financing or $2,500 rebates available.
  • We serve Charleston and surrounding Lowcountry areas.
What people say
Exceeded my expectations Professional and courteous staff Prompt emergency service Durable repairs Knowledgeable technicians
Update Listing
Services
AC Repairs
Our certified technicians diagnose and fix cooling system issues efficiently, ensuring optimal performance during Charleston's hot summers. We handle refrigerant leaks, compressor failures, and thermostat malfunctions using Trane-certified parts. With rapid response times and lasting solutions, we minimize downtime and energy costs for residential and commercial clients.
Geothermal Systems
AGL installs and maintains eco-friendly WaterFurnace geothermal systems that cut energy bills by up to 70%. These systems leverage underground temperatures for efficient heating and cooling, ideal for Lowcountry humidity. Our specialists handle full system installations, well repairs, and efficiency upgrades, combining sustainability with long-term savings.
Indoor Air Quality
We improve home health with air purification, UV lights, and dehumidifiers that remove allergens and mold. Our systems address Charleston's humidity challenges, reducing respiratory irritants by 99.98%. From electronic air cleaners to crawlspace dehumidifiers, we customize solutions for allergy sufferers and families.
Heating Repairs
Our team swiftly resolves heating emergencies, from pilot light failures to heat exchanger cracks. Using Trane parts and preventive maintenance, we extend system lifespans while ensuring winter reliability. Clients benefit from same-day service and diagnostics that prevent costly breakdowns in Charleston's variable winters.
Duct Repair
We seal and insulate ducts to eliminate energy loss, improving HVAC efficiency by up to 20%. Our technicians use fiberboard and metal repairs to address leaks in attics, crawlspaces, and walls. This service enhances comfort consistency and reduces utility bills, particularly in older Lowcountry homes with outdated duct systems.
Questions
What HVAC services does AGL Heating & Air offer?
We provide AC/heating repairs, geothermal systems, ductwork, indoor air quality solutions, and Trane product installations across Charleston and the Lowcountry.
Do you offer emergency HVAC service?
Yes, we provide same-day emergency repairs for critical heating and cooling failures.
Are financing options available?
Yes, choose 48-month financing or up to $2,500 rebates on select systems with approved credit.
What areas do you service?
We serve Charleston, Mount Pleasant, James Island, Kiawah Island, and surrounding South Carolina communities.
How can I improve indoor air quality?
Install electronic air cleaners, UV lights, or dehumidifiers designed to remove 99.98% of allergens from your home.
Reviews (7)
Bob R.
Jun 22, 2022 Report
I think AGL is superior. We bought our home in Charleston a year ago and decided to keep AGL on the recommendation of the previous owner. Could not be happier with the service and professionalism of their people.
Shafi Keisler
Jun 14, 2022 Report
Great team, good prices, excellent service. Jason is a phenomenal technician that nails it every time. Shonn provides fast and transparent sales and customer service. Tops. They will be installing our next system. a Trane variable speed system. Quoted 5 companies. Great price and service. Services: Heating system repair, A/C system repair, Heating system maintenance, Installation, HVAC system repair, Cleaning, A/C preventive maintenance, HVAC duct & vent repair, A/C system maintenance, Repair HVAC, Install AC, HVAC system maintenance
Baird Mallory
Jun 04, 2022 Report
Your representative was prompt, courteous, and professional. He answered all of my questions and inspected the ductwork for leaks. We have asked to have him perform all of our HVAC maintenance. Service: HVAC system maintenance
James Chuber
May 09, 2022 Report
Replaced HVAC system and new duct work. Ricky was great to work with on the modifications I wanted to make. The crew that did the install (Patrick and Will) did great too and answered all my questions, being an Engineer I was very involved with the install. Great work by AGL! James Chuber Kiawah Island
Nick Penna
Apr 23, 2022 Report
Everything went perfectly. From the initial estimate from Shonn to completion. Everyone was professional and responsive. The job went smooth and they did a great job keeping the place clean during and after. Thank you Shonn and crew. Highly recommend AGL Heating and Air. Service: Installation
Lynette Morris
Mar 10, 2022 Report
AGL is always on time and even early sometime. The service rep always calls about 30 min. Before they come. Staff is knowledgeable and explains what needs to be done and gives an estimate. Then you choose if your wanting to go forward. It also needs to be said the office staff is always polite and works well with us. We highly recommend. Services: A/C system repair, Repair HVAC
J. Horn
Feb 22, 2022 Report
Andrew spent a lot of time reviewing options for new HVAC systems and providing the cost/benefit of more efficient Trane models. He ultimately recommended and installed a system with great (but not the highest) efficiency. Leading up to the install, Andrew proactively communicated what would happen, when it would happen, and what his potential concerns were. Andrew was on top of the details so that I didn't need to worry and I didn't have to babysit. Employees were friendly, professional and efficient. The HVAC replacement was done on time, on budget, and hassle free. I highly recommend AGL and will use them again when it's time to replace the current system (in 20yrs!).