Master HVAC/R Licenses ​MD STATE # 01-3905 - AA COUNTY # D1-2697 - DISTRICT OF COLUMBIA # RM-900896

CALL US TODAY: 410-449-3030  /  1-844-OBRIEN1

for immediate assistance:

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About Our Company

Our History

Bill O'Brien, principal and founder of O'Brien HVAC Services has been a business owner for over 16 years. A United States Navy Veteran, father of 4 young men with over 25 years of experience in many facets of the HVAC/R trade.  He highly values every customer both residential and commercial.  Bill has a Masters License in the HVAC/R trade in the state of Maryland and the District of Columbia.  Since starting his business, Bill has prided himself on performing every job with the highest integrity and has focused on providing honest reliable and affordable Heating and Colling repair to local business and residential customers in the surrounding Maryland and DC area.  He would be honored to help your business or home HVAC system achieve maximum efficiency, comfort, and longevity.

24/7 Emergency Support

Licensed & Insured

Fast & Reliable

25 Years Experience

Our Mission

Our goal is to be a trusted leader in providing high quality HVAC/R Service and Installation. We value every customer and strive to provide the highest quality of service and to help provide a greater understanding of their heating and air conditioning system. We aim to accomplish this mission by ensuring attention to detail, timely repairs and doing the job right the first time.

The O'Brien Difference

There are many reasons to choose O'Brien HVAC Services for your residential or commercial needs. We offer:

  • Professional, licensed technicians
  • Parts and workmanship guaranteed
  • Prompt, reliable service
  • Price guarantee before we start any job
  • All jobs done right the first time

We’re proud to offer 24/7 Emergency Service; In the heat of the summer, or the bitter cold of winter a broken air conditioning or heating system can be a major problem. When this happens, you can’t always wait until business hours for a repairman to come out and fix your unit. Luckily, when you work with O'Brien HVAC Services, you do not have to wait. We offer 24/7 emergency repair service. Whether you need us day or night, weekday or weekend, or even on a holiday, you can rest assured that one of our experienced and knowledgeable technicians will quickly respond to your call.

If you are dealing with a problem with your residential HVAC system or you are ready for an upgrade to your outdated or inefficient system, contact us for assistance today. An experienced technician will  promptly come out to either repair or help decide if it's time to upgrade your system and return your home to a comfortable temperature once more!

We know you are the backbone of our business and we strive to provide ALL of our customers with the proper courtesy and respect at all times. We only work with the most skilled technicians and our team is the best in the business. We love what we do, and it shows with every job we complete.

Service Areas

service area:

Anne Arundel County

Annapolis
Arnold
Baltimore
Churchton
Crofton
Crownsville
Curtis Bay
Davidsonville
Deale
Edgewater
Fort George G Meade
Friendship
Galesville
Gambrills
Gibson Island
Glen Burnie
Hanover
Harmans
Harwood
Laurel
Linthicum Heights
Lothian
Mayo
Millersville
Odenton
Pasadena
Riva
Severn
Severna Park
Shady Side
Tracys Landing
West River

Anne Arundel County, MD
Standard Zip Codes

 21013  21030  21031  21043  21051  21053  21057  21074  21082  21087  21093  21102  21104  21111  21117  21120  21128   21131  21133  21136  21152  21155  21156  21161  21162  21163  21204  21206  21207  21208  21209  21210  21212  21215  21219  21220  21221  21222  21224  21227  21228  21229  21234  21236  21237  21239  21244  21286

service area:

Howard County

Annapolis Junction
Clarksville
Columbia
Cooksville
Dayton
DHS
Elkridge
Ellicott City
Fulton
Glenelg
Glenwood
Highland
Ilchester
Jessup
Laurel
Lisbon
North Laurel
Savage
Scaggsville
Simpsonville
West Friendship
Woodbine
Woodstock
North Laurel
Savage

Howard County, MD
Standard Zip Codes

 20588  20701  27023  20759  20763  20777  20794  21029  21041  21042  21043  21044  21045  21046  21075  21150  21163  21723  21737  21738  21765  21794  21797

service area:

Prince George's County

Accokeek
Andrews Air Force Base
Aquasco
Beltsville
Bladensburg
Bowie
Brandywine
Brentwood
Capitol Heights
Cheltenham
Clinton
College Park
District Heights
Fort Washington
Glenn Dale
Greenbelt
Hyattsville
Lanham
Laurel
Mount Rainier
Oxon Hill
Riverdale
Southern MD Facility
Suitland
Temple Hills
Upper Marlboro

Prince George's County, MD
Standard Zip Codes

 20607  20762  20608  20705  20710  20716  20715  20720  20613  20722  20782  20735  20740  20742  20743  20737  20747  20744  20745  20769  20770  20748  20781  20774  20721  20785  20783  20707  20772  20712  20784  20623  20706  20708  20746

service area:

Baltimore County

Baldwin
Baltimore
Boring
Brooklandville
Butler
Catonsville
Chase
Cockeysville
Dundalk
Essex
Fork
Fort Howard
Freeland
Glen Arm
Glyndon
Gwynn Oak
Halethorpe
Hunt Valley
Hydes
Kingsville
Long Green
Lutherville Timonium
Maryland Line
Middle River
Monkton
Nottingham
Owings Mills
Parkton
Parkville
Perry Hall
Phoenix
Pikesville
Randallstown
Reisterstown
Riderwood
Rosedale
Sparks Glencoe
Sparrows Point
Stevenson
Towson
Upper Falls
Upperco
White Marsh
Windsor MillAccokeek

Baltimore County, MD
Standard Zip Codes

 21013  21030  21031  21043  21051  21053  21057  21074  21082  21087  21093  21102  21104  21111  21117  21120  21128  21131  21133  21136  21152  21155  21156  21161  21162  21163  21204  21206  21207  21208  21209  21210  21212  21215  21219  21220  21221  21222  21224  21227  21228  21229  21234  21236  21237  21239  21244  21286

customer reviews

"We had several quotes to replace our HVAC system, hands down the best price and awesome, quick installation in the middle of a heat wave. Customer for life! "
-David, Pasadena

"The repairman was prompt, courteous and very knowledgeable. He explained everything in detail and gave me helpful tips on maintaining my unit. "
-Chris, Odenton

"Reliable service and very reasonable prices. "
-Mike, Severn

"I placed an emergency heating call, and O'Brien HVAC was quick to respond and resolved our heating problem. THANK YOU! I am now a PMA customer. "
-Christine, Crofton

"Quick response and fixed our Walk-In Cooler during the service call. "
-Dan, Annapolis

Interested in our Services?

If you are dealing with a problem with your residential HVAC system or you are ready for an upgrade to your outdated or inefficient system, contact us for assistance today. An experienced technician will  promptly come out to either repair or help decide if it's time to upgrade your system and return your home to a comfortable temperature once more!

let's get started
residentialcommercialaboutnews & updatescontact
O'Brien HVAC Services

410-449-3030

1121 Annapolis Rd #321, Odenton, MD 21113

bill.obrien@obrienhvacservices.com

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