All One Hour® Locations in Maryland

One Hour Heating & Air Conditioning® proudly serves communities throughout Maryland, providing reliable HVAC services with a focus on comfort, efficiency, and customer satisfaction. Whether you’re in a busy urban area or a quiet neighborhood, we are your trusted source for all heating and cooling needs. Our services are tailored to meet Maryland’s specific regulations, ensuring your home’s HVAC system operates safely, efficiently, and in line with local codes. With a team of certified, highly trained technicians, we are dedicated to delivering prompt, professional service for everything from routine maintenance to system repairs and installations.

For dependable, local HVAC solutions, find your nearest One Hour Heating & Air Conditioning® in Maryland today. As a locally owned and operated business, we understand the specific climate challenges your community faces and provide personalized solutions to keep your home comfortable year-round. Whether you need emergency repairs, a new system installation, or regular maintenance, our team ensures the job is done right, on time, and with minimal disruption.

At One Hour Heating & Air Conditioning®, your satisfaction is our priority. We offer flexible scheduling, transparent upfront pricing, and a commitment to making your experience hassle-free from start to finish. Trust our expert technicians to provide reliable heating and cooling services you can depend on. Find your local One Hour Heating & Air Conditioning® today!


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  • One Hour Heating & Air Conditioning® Cockeysville

    100 Cockeysville Road
    Suite 400 A1
    Cockeysville, MD 21030

    (410) 989-4378
    Website Book Now

    Areas Serviced:

  • One Hour Heating & Air Conditioning® of Annapolis

    1125 West Street
    Unit 609
    Annapolis, MD 21401

    (301) 804-6803
    Website Book Now

    Areas Serviced:

    • Annapolis
    • Arnold
    • Brooklyn
    • Cape Saint Claire
    • Chester
    • Churchton
    • Crofton
    • Crownsville
    • Davidsonville
    • Deale
    • Edgewater
    • Friendship
    • Galesville
    • Gambrills
    • Glen Burnie
    • Grasonville
    • Harwood
    • Kent Island
    • Lothian
    • Mayo
    • Millersville
    • Mitchellville
    • Odenton
    • Pasadena
    • Queenstown
    • Riva
    • Severn
    • Severna Park
    • Shady Side
    • Stevensville
    • Upper Marlboro
  • One Hour Heating & Air Conditioning® of Baltimore

    3702 Yosemite Avenue
    Baltimore, MD 21215

    (301) 685-0314
    Website Book Now

    Areas Serviced:

    • Baltimore
    • Brooklandville
    • Dundalk
    • Essex
    • Fork
    • Gwynn Oak
    • Hunt Valley
    • Middle River
    • Nottingham
    • Owings Mills
    • Parkville
    • Perry Hall
    • Pikesville
    • Rosedale
    • Sparrows Point
    • Stevenson
    • Towson
    • White Marsh
  • One Hour Heating & Air Conditioning® of Columbia

    8479 Tamar Drive
    Suite 634
    Columbia, MD 21045

    (301) 918-5642
    Website Book Now

    Areas Serviced:

    • Annapolis Junction
    • Arbutus
    • Baltimore
    • Bowie
    • Catonsville
    • Clarksville
    • Columbia
    • Cooksville
    • Crofton
    • Dayton
    • Elkridge
    • Ellicott City
    • Ferndale
    • Fulton
    • Glen Burnie
    • Halethorpe
    • Harmans
    • Hanover
    • Ilchester
    • Jessup
    • Linthicum
    • Lisbon
    • Marriottsville
    • Millersville
    • Odenton
    • Owings Mills
    • Pasadena
    • Relay
    • Randallstown
    • Reisterstown
    • Scaggsville
    • Severn
    • Severna Park
    • South Laurel
    • Savage
    • Simpsonville
    • Woodstock
  • One Hour Heating & Air Conditioning® of Delmarva

    9928 Old Ocean City Blvd
    Suite 9
    Berlin, MD 21811

    (410) 844-8876
    Website Book Now

    Areas Serviced:

    • Bethany Beach
    • Bethel
    • Bridgeville
    • Dagsboro
    • Delmar
    • Ellendale
    • Fenwick Island
    • Frankford
    • Georgetown
    • Greenwood
    • Harbeson
    • Harrington
    • Houston
    • Laurel
    • Lewes
    • Lincoln
    • Milford
    • Millsboro
    • Millville
    • Milton
    • Nassau
    • Ocean View
    • Rehoboth Beach
    • Seaford
    • Selbyville
    • Easton
    • Barclay
    • Bethlehem
    • Cambridge
    • Centreville
    • Church Creek
    • Church Hill
    • Claiborne
    • Cordova
    • Crapo
    • Crocheron
    • Denton
    • East New Market
    • Federalsburg
    • Fishing Creek
    • Goldsboro
    • Grasonville
    • Greensboro
    • Henderson
    • Hillsboro
    • Hurlock
    • Ingleside
    • Madison
    • Newcomb
    • Oxford
    • Preston
    • Price
    • Queen Anne
    • Queenstown
    • Rhodesdale
    • Ridgely
    • Royal Oak
    • Saint Michaels
    • Secretary
    • Taylors Island
    • Toddville
    • Trappe
    • Wingate
    • Woolford
    • Wye Mills
    • Salisbury
    • Allen
    • Berlin
    • Bishopville
    • Bivalve
    • Crisfield
    • Deal Island
    • Eden
    • Fruitland
    • Girdletree
    • Hebron
    • Linkwood
    • Manokin
    • Mardela Springs
    • Marion Station
    • Nanticoke
    • Newark
    • Ocean City
    • Parsonsburg
    • Pittsville
    • Pocomoke City
    • Powellville
    • Princess Anne
    • Quantico
    • Rehobeth
    • Sharptown
    • Showell
    • Snow Hill
    • Stockton
    • Tyaskin
    • Upper Fairmount
    • Vienna
    • Westover
    • Whaleyville
    • Willards
    • Delmar
  • One Hour Heating & Air Conditioning® of Frederick

    6639 Ballenger Run Blvd
    Frederick, MD 21703

    (301) 284-0896
    Website Book Now

    Areas Serviced:

    • Boonsboro
    • Braddock Heights
    • Broad Run
    • Burkittsville
    • Cavetown
    • Clear Spring
    • Damasus
    • Emmitsburg
    • Fairplay
    • Funkstown
    • Gapland
    • Hagerstown
    • Hancock
    • Highfield-Cascade
    • Jefferson
    • Keedysville
    • Kempton
    • Knoxville
    • Libertytown
    • Linganore
    • Lovettsville
    • Middletown
    • Monrovia
    • Mount Aetna
    • Myersville
    • New Market
    • Point Of Rocks
    • Rohrersville
    • Rocky Ridge
    • Sabillasville
    • Sharpsburg
    • Smithsburg
    • Thurmont
    • Union Bridge
    • Walkersville
    • Williamsport
    • Woodbine
  • One Hour Heating & Air Conditioning® of Gaithersburg

    9815 Watkins Road
    Gaithersburg, MD 20882

    (301) 396-7481
    Website Book Now

    Areas Serviced:

    • Ashton
    • Beallsville
    • Boyds
    • Brookeville
    • Burtonsville
    • Cabin John
    • Clarksburg
    • Colesville
    • Comus
    • Damascus
    • Darnestown
    • Derwood
    • Dickerson
    • Gaithersburg
    • Germantown
    • Glen Echo
    • Kensington
    • Montgomery Village
    • Olney
    • Poolesville
    • Potomac
    • Rockville
    • Sandy Spring
    • Spencerville
    • Suburb Maryland Fac
    • Washington Grove
  • One Hour Heating & Air Conditioning® of Harford County

    16A Bel Air South Parkway
    Suite 300
    Bel Air, MD 21015

    (301) 321-7231
    Website Book Now

    Areas Serviced:

    • Aberdeen
    • Abingdon
    • Bel Air
    • Bel Air North
    • Bel Air South
    • Cardiff
    • Churchville
    • Colora
    • Conowingo
    • Darlington
    • Edgewood
    • Emmorton
    • Essex
    • Fallston
    • Forest Hill
    • Fork
    • Fort George G Meade
    • Havre De Grace
    • Jarrettsville
    • Joppa
    • North East
    • Perryville
    • Pylesville
    • Street
    • Whiteford
  • One Hour Heating & Air Conditioning® of Mount Airy

    2702 Back Acre Circle
    Mount Airy, MD 21771

    (301) 259-3815
    Website Book Now

    Areas Serviced:

    • Frederick
    • Gaithersburg
    • Glenelg
    • Granite
    • Greenmount
    • Hampstead
    • Keymar
    • Lineboro
    • Manchester
    • Marriottsville
    • Monrovia
    • Mount Airy
    • New Windsor
    • Reisterstown
    • Sykesville
    • Taneytown
    • Thurmont
    • Union Bridge
    • Westminster
    • Woodbine
  • One Hour Heating & Air Conditioning® of PG County

    3100 Ritchie Road
    Unit G
    District Heights, MD 20747

    (240) 201-4722
    Website Book Now

    Areas Serviced:

    • Washington
    • Fort Washington
    • Suitland
    • District Heights
    • Temple Hills
    • Andrews Air Force Base
  • One Hour Heating & Air Conditioning® of Silver Spring

    2600 Forest Glen Road
    Suite 3
    Silver Spring, MD 20910

    (301) 945-7611
    Website Book Now

    Areas Serviced:

    • Adelphi
    • Andrews Air Force Base
    • Annapolis Junction
    • Beltsville
    • Bethesda
    • Bladensburg
    • Bowie
    • Brandywine
    • Brentwood
    • Burtonsville
    • Camp Springs
    • Capitol Heights
    • Chevy Chase
    • College Park
    • Colmar Manor
    • Forest Heights
    • Fort Washington
    • Gaithersburg
    • Garrett Park
    • Glenn Dale
    • Greenbelt
    • Hyattsville
    • Kensington
    • Lanham
    • Laurel
    • Mount Rainier
    • North Beach
    • Oxon Hill
    • Riverdale
    • Rockville
    • Silver Spring
    • Spencerville
    • Suburb Maryland Fac
    • Temple Hills
    • Upper Marlboro
    • Washington