No heat or no cooling right now?
If you smell gas or a carbon monoxide alarm sounds, leave first and call 911 or your gas utility from outside. Otherwise, call a company below that says it takes emergency calls. Quick checks first: AC not cooling · furnace not working.
The list
Knoxville HVAC companies, A to Z
Filter by what each business says on its own website. “Says 24/7 emergency” means its site says so – call to confirm before you rely on it.
Your HVAC company, Knoxville
The one City Spotlight place for Knoxville sits here, above the A to Z list. Requests sent from this page for areas the Spotlight company serves go to it. Offered only to companies that pass our listing rules. How it works
865 HVAC
Based in Knoxville, TN · 7609 Maynardville Pike, Knoxville, TN 37918
License number shown on its website: #76398
A & L HVAC & Plumbing
Based in Maryville, TN · 5520 US Highway 411S, Maryville, TN 37801
Names on its website: Alcoa, Friendsville, Greenback, Lenoir City, Loudon, Louisville, Madisonville, Vonore, Walland
License number shown on its website: TN CMC-C # 68349
A-1 Finchum Heating & Cooling
Based in Knoxville, TN · 2502 W. Emory Road, Knoxville, TN 37849
Names on its website: Lenoir City, Farragut, Oak Ridge
Adkins Heating And Air Conditioning
Based in Oliver Springs, TN · 367 East Tri County Boulevard, Oliver Springs, TN 37840
Names on its website: Oak Ridge, Clinton, Kingston, Harriman, Wartburg, Lenoir City
Advanced Heat AC & Plumbing
Based in Knoxville, TN · 2501 Byington Beaver Ridge Rd., Knoxville, TN 37931
Names on its website: Alcoa, Clinton, Corryton, Farragut, Friendsville, Lenoir City, Louisville, Maryville, Oak Ridge, Powell and more
License number shown on its website: 48048
Aire Care Mechanical Heating & Cooling
Based in Knoxville, TN · 504 Carden Jennings Ln #102, Knoxville, TN 37932
Names on its website: Farragut, Hardin Valley, Oak Ridge, Maryville, Lenoir City, Seymour, Powell, Halls, Oliver Springs
All-Star Heating and Air Conditioning
Based in Knoxville, TN · 3541 Neal Dr, Knoxville, TN 37918
Names on its website: Farragut, Fountain City, Halls, Hardin Valley, Karns, Powell, Cedar Bluff, Concord, Tellico Village, Turkey Creek and more
License number shown on its website: TN – 76977; TN – 4951
Buie's Heating and Air, LLC
Based in Powell, TN
Names on its website: Knoxville, Oak Ridge, Maryville, Farragut, Alcoa, Lenoir City, Clinton, Seymour, Karns, Halls and more
Cantrell's Heat and Air Inc.
Based in Knoxville, TN · 5715-B Old Tazewell Pike, Knoxville, TN 37918
Central City Heating & Air Conditioning
Based in Knoxville, TN · 1001 Katherine Ave, Knoxville, TN 37921
Names on its website: Alcoa, Clinton, Farragut, Hardin Valley, Karns, Kingston, Lenoir City, Maryville, Oak Ridge, Powell and more
Chancey & Reynolds
Based in Knoxville, TN
Names on its website: Lenoir City
License number shown on its website: TN: #18756
City Heating and Air Conditioning
Based in Knoxville, TN · 3111 NW Park Dr, Knoxville, TN 37921
Names on its website: Powell, Farragut, Loudon, Alcoa, Tellico Village, Lenoir City, Maryville
Cook's Comfort Systems, Inc.
Based in Knoxville, TN · 9723 Kingston Pike STE C, Knoxville, TN 37922
Names on its website: Oak Ridge, Lenoir City, Loudon, Clinton
License number shown on its website: #45945 – TN
Dayspring Heating & Air
Based in Friendsville, TN · 880 Kiser Station Rd, Friendsville, TN 37737
Names on its website: Alcoa, Farragut, Greenback, Lenoir City, Maryville, Loudon, Oak Ridge, Vonore, West Knoxville
Everest Air – Heating & Cooling
Based in Alcoa, TN · 261 Hannum St, Alcoa, TN 37701
Names on its website: Maryville, Knoxville, Farragut, Clinton, Oak Ridge, Lenoir City, Louisville, Karns, Seymour, Friendsville and more
License number shown on its website: #76167
J.C.'s Heating & Air
Based in Knoxville, TN · 3110 Henson Rd, Suite 7, Knoxville, TN 37921
Names on its website: Clinton, Farragut, Lenoir City, Maryville, Oak Ridge
Knoxville A/C Service
Based in Knoxville, TN
Names on its website: Maryville, Farragut, Oak Ridge, Alcoa, Clinton, Harriman, Kingston, Lenoir City, Louisville
Melton Heating and Air Conditioning
Based in Clinton, TN · 828 Clinch Ave., Clinton, TN 37716
Names on its website: Knoxville, Oak Ridge, Lenoir City
License number shown on its website: #36650 – TN
Powell Brothers Mechanical Contractors
Based in Clinton, TN · 930 N. Charles G. Seivers Blvd., Clinton, TN 37717
Names on its website: Oak Ridge, Knoxville
License number shown on its website: License #34391
Rocky Top HVAC, LLC
Based in Knoxville, TN · 7327 Oak Ridge Hwy, Knoxville, TN 37931
Names on its website: Farragut, Hardin Valley, Powell, Clinton, Karns, Halls, Corryton, Maryville, Louisville, Seymour and more
Smith Heating and Air, LLC
Based in Knoxville, TN · 3416 Zion Ln, Knoxville, TN 37931
License number shown on its website: Trade License # 78671
Strada Services
Based in Knoxville, TN · 7333 Oak Ridge Hwy, Knoxville, TN 37931
Names on its website: Farragut, Powell, Halls, Karns, Oak Ridge, Maryville, Alcoa, Hardin Valley
License number shown on its website: Tennessee #78195
Details on this page come from each business’s own website, checked October 2026. Free listings are shown alphabetically. How we list · Update or remove a listing
Before you hire
Checking an HVAC company in the Knoxville area
HVAC licenses in Tennessee
Licensing is split between the state and local governments.
Who licenses: Tennessee Board for Licensing Contractors, Department of Commerce and Insurance
License types: CMC-C (HVAC, Refrigeration and Gas Piping; Solar HVAC (Geothermal)), CMC (Full mechanical contracting classification).
Companies: Under Tenn. Code Ann. Title 62, Chapter 6, contractors on projects of $25,000 or more, including mechanical and HVAC work, must hold a Board-issued contractor license with the matching classification (CMC-C covers HVAC and refrigeration).
Local rules: Most HVAC projects under $25,000 are regulated locally, and cities and counties may issue their own mechanical or journeyman HVAC licenses (some counties also require a Home Improvement license).
Check a license: search.cloud.commerce.tn.gov
Search the company on the state license lookup for jobs of $25,000 or more, and for smaller jobs call your city or county codes office to learn what local HVAC license applies.
Federal rule: in every state, technicians who handle refrigerant must hold EPA Section 608 certification, whatever the state or city requires.
Sources: tn.gov, tn.gov, tn.gov, support.commerce.tn.gov. Checked October 2026 from official sources. This is not legal advice.
Questions to ask
Ask every company the same questions: license number, insurance, EPA refrigerant certification, a written itemized estimate, a load calculation for new equipment, after-hours rates, who pulls the permit, and the warranty. All eight questions.
Seasonal care
Year-round care in Knoxville
Knoxville homes lean on both heating and cooling, so each system needs a check before its season: cooling in spring, heating in fall.
Questions
Knoxville HVAC questions
How many HVAC companies are listed in Knoxville?
22 HVAC companies, each based within about 35 miles of Knoxville. They are listed alphabetically.
Which Knoxville HVAC companies say they offer 24/7 emergency service?
12 of the businesses listed here say on their own website that they offer 24/7 or 24-hour emergency service: 865 HVAC, A & L HVAC & Plumbing, A-1 Finchum Heating & Cooling, Advanced Heat AC & Plumbing, All-Star Heating and Air Conditioning, Buie’s Heating and Air, LLC, Chancey & Reynolds, J.C.’s Heating & Air, Knoxville A/C Service, Rocky Top HVAC, LLC, Smith Heating and Air, LLC, Strada Services. Call to confirm availability and after-hours rates.
Do HVAC contractors in Knoxville need a license?
In Tennessee, licensing is split between the state and local governments. Check a license at search.cloud.commerce.tn.gov.
Which Knoxville companies work on heat pumps?
19 of the listed businesses say on their own website that they install or repair heat pumps. Use the Heat pumps filter above the list.
Which HVAC companies here do commercial work?
17 of the listed businesses say on their own website that they work on commercial properties. Use the Commercial filter above the list.
Do technicians need EPA certification?
Yes: federal rules require technicians who handle refrigerant to hold EPA Section 608 certification, in every state. Ask any company you are considering.
Nearby metro areas: Atlanta, GA · Charlotte, NC · St. Louis, MO · Kansas City, MO · Nashville, TN · Virginia Beach, VA · Raleigh, NC · Louisville, KY. All of Tennessee.
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Ask us to find an HVAC company in Knoxville
Tell us the job and your ZIP code. We pass your request to listed companies that serve your area, and they contact you directly.
No heat in freezing weather, or no cooling in dangerous heat? Call a company from the list that says it takes emergency calls – a form is not fast enough. If you smell gas or a carbon monoxide alarm sounds, leave first and call 911 or your gas utility from outside.