GAC Services

Heating and Air Conditioning, Electrical, Generator,

About us

GAC Services is a residential cooling, heating, and electrical contractor setting new standards in the Maryland HVAC and electric market. Since 1970, we’ve developed a strong reputation for providing the Montgomery County and Frederick County areas with reliable cooling and heating services. In 2014, we expanded our service offerings to include electrical services—allowing us to offer our customers the same great service in a new area of business. Additional DBA: Gaithersburg Heating & Cooling

Business highlights

55 years of trusted experience

Services we offer

HVAC, Duct Sealing, Cooling, Heating, Electric, Generators

Services we don't offer

Duct Cleaning

Amenities

Free Estimates
Yes
Warranties
Yes


Accepted payment methods

Check
Discover
MasterCard
Visa

Photos of past projects

Reviews

4.8279 Reviews
Number of StarsImage of DistributionNumber of Ratings
5
89%
4
6%
3
2%
2
2%
1
1%


Rating CategoryRating out of 5
quality
4.9
value
4.7
professionalism
4.9
responsiveness
4.9
punctuality
4.9

Filter reviews by category

Showing 201-225 of 279 reviews

Dan O.
09/2024
5.0
heating & air conditioning/hvac
  + -1 more
Knowledgeable and professional
Description of Work: Water leak investigation in AC

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

SETH G.
07/2023
5.0
electrician
  + -1 more
Very well
Description of Work: Fix outlet

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$110

Susan H.
11/2021
5.0
electrician, heating & air conditioning/hvac
  + 0 more
They are reliable. Great service
Description of Work: They did the electrical in my garage
Rating CategoryRating out of 5
Yes, I recommend this pro

Saul P.
10/2017
5.0
heating & air conditioning/hvac
  + -1 more
I have a contract with them.
Description of Work: ...

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

Richard M.
08/2017
5.0
heating & air conditioning/hvac
  + -1 more
*
Description of Work: They did the Fall inspection.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

Elaine G.
07/2017
5.0
heating & air conditioning/hvac
  + -1 more
.
Description of Work: They changed the filters and checked the thermostat to make sure it was at the right settings. They checked the heating unit itself.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

Ryan F.
02/2017
5.0
heating & air conditioning/hvac
  + -1 more
I will use them again.
Description of Work: I hired them out for routine maintenance on my furnace.
Rating CategoryRating out of 5
Yes, I recommend this pro

Alan P.
01/2017
5.0
heating & air conditioning/hvac
  + -1 more
unknown
Description of Work: .
Rating CategoryRating out of 5
Yes, I recommend this pro

Wendy E.
12/2016
5.0
heating & air conditioning/hvac
  + -1 more
unknown
Description of Work: .
Rating CategoryRating out of 5
Yes, I recommend this pro

Oscar B.
11/2016
5.0
heating & air conditioning/hvac
  + -1 more
unknown
Description of Work: .
Rating CategoryRating out of 5
Yes, I recommend this pro

Linda T.
10/2016
4.0
heating & air conditioning/hvac
  + -1 more
Quite well.
Description of Work: New heat pump

Rating CategoryRating out of 5
quality
4.0
value
3.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$13,000

Bill B.
10/2016
5.0
heating & air conditioning/hvac
  + -1 more
.
Description of Work: .
Rating CategoryRating out of 5
Yes, I recommend this pro

Kendra L.
10/2016
5.0
heating & air conditioning/hvac
  + -1 more
unknown
Description of Work: .
Rating CategoryRating out of 5
Yes, I recommend this pro

Elizabeth C.
09/2016
5.0
heating & air conditioning/hvac
  + -1 more
.
Description of Work: I used GAC Services Gaithersburg for heating and A/C service. Replace the H back air conditioning and heating system.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

Diane F.
09/2016
5.0
heating & air conditioning/hvac
  + -1 more
unknown
Description of Work: GAC came and diagnosed my problem with my heat pump. Essentially it needed to be replaced as repairs were outrageous. The scheduled an estimator who was prompt, submitted three options for replacement and did the work on time and efficiently. They cleaned up after themselves and were very nice to deal with. I highly recommend them.
Rating CategoryRating out of 5
Yes, I recommend this pro

Dan K.
09/2016
5.0
heating & air conditioning/hvac
  + -1 more
unknown
Description of Work: .
Rating CategoryRating out of 5
Yes, I recommend this pro

FRANCIS P.
07/2006
5.0
heating & air conditioning/hvac
  + -1 more
Our three year old central A/C was not cooling the house this summer. Since Gaithersburg Heating and A/C installed the system originally, we asked them to check it out. It took two visits but the rep. discovered the problem and fixed it. Because they did not get it right the first time, they offered a substantial discount on a Saturday morning visit that required several hours of service. They were very nice, professional, clean, and willing to educate us on how to save energy costs. Even though they did not get the problem fixed the first time, I really liked how they took responsibility for the problem and made sure it was solved before leaving.
Description of Work: They did an A/C diagnostic and repair.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$100

05/2006
5.0
heating & air conditioning/hvac
  + -1 more
I was very impressed with this company. They already have come out twice to check up since we bought the unit, and they have been very pleasant. I would recommend them to others and will definitely use them in the future.
Description of Work: They installed a new a/c unit, and we also got a service contract with them.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

KH E.
04/2006
5.0
heating & air conditioning/hvac
  + -1 more
Arrived on time. Gave lots of information about what they were doing and what I needed to know. Very polite. Suggested a service contract that saved me $60 on the year's service. So cost for this service was $80.
Description of Work: Serviced heating/AC plant for summer.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
punctuality
5.0

Yes, I recommend this pro
$159

PATRICIA M.
04/2006
5.0
heating & air conditioning/hvac
  + -1 more
Everything was done very professionally and politely from the initial estimate to the installation, which was done within a few days of my approval of the estimate. The estimator was very helpful and informative. The installers were punctual, polite, and cleaned up everything very nicely. The system was not cheap, but I feel like I got good value for my money and have a reliable firm to back up my purchase.
Description of Work: Replaced heat pump system (indoor and outdoor units) and humidifier in late February 2006. New heat pump equipment is by Carrier, and the humidifier is Aprilaire.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$6,331

Fred S. S.
02/2006
5.0
heating & air conditioning/hvac
  + -1 more
I have been in this area almost 50 years and have had experience with several HVAC contractors. Gaithersburg Heating & Air Conditioning is the best of any I've used. They are courteous, prompt, and most importantly, efficient and knowledgeable. Their technicians seem to be more experienced than most. Their work is outstanding and lasting. The attitude of the employees at all levels makes them a pleasure to deal with. In my judgment, there is no better HVAC contractor in this area.
Description of Work: This company has provided me periodic maintenance services as well as equipment installation. They made changes to distillate lines, repaired or replaced components, and added new equipment.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$200

Rebecca K.
11/2005
5.0
heating & air conditioning/hvac
  + -1 more
THE STAFF AT GAITHERSBURG AIR CONDITIONING WAS VERY PROFESSIONAL. THE PRICING WAS VERY REASONABLE AND THEY DID A GOOD JOB IN A TIMELY MANNER. THEY PRESENTED US WITH SEVERAL SERVICING OPTIONS BEFORE WE ULTIMATELY DECIDED TO REPLACE THE SYSTEM.
Description of Work: INSTALLED NEW AIR CONDITIONING SYSTEM. BOTH INSIDE AND OUTSIDE UNITS WERE REPLACED.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$4,000

JACKIE G.
02/2005
5.0
heating & air conditioning/hvac
  + -1 more
THEY WERE VERY PROFESSIONAL AND CAME OUT THE DAY AFTER I CALLED.
Description of Work: FIXER HEATER. NEEDED A NEW MOTOR.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$356

LAURA J.
02/2005
5.0
heating & air conditioning/hvac
  + -1 more
THEY WERE THE EASIEST COMPANY TO WORK WITH -- QUICK RESPONSE, COURTEOUS AND PROFESSIONAL TECHNICIANS. THEY WERE VERY COMPETITIVELY PRICED. WE HAVE USED THEM FOR ALL OF OUR HVAC NEEDS!
Description of Work: REPLACED FAN RELAY FOR HUMIDIFIER AND TESTED. REPLACED PANEL FOR 760 HUMIDIFIER.

Rating CategoryRating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$198

MINDY B.
12/2004
5.0
heating & air conditioning/hvac
  + -1 more
YEARS AGO I STARTED WITH GAITHERSBURG A/C AND HEATING AND I HAVE CONTINUED USING THEM. THEY ARE ALWAYS PROMPT AND COME OUT WHEN THEY SAY THEY WILL. IF AN EMERGENCY SITUATION ARISES THEY DO THEIR BEST TO COME OUT ASAP.
Description of Work: YEARLY MAINTENANCE AND ONGOING CARE OF OUR HEAT PUMPS.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$300

Contact information

227 E Deer Park Dr, Gaithersburg, MD 20877

http://www.GACServices.com

Service hours

Sunday:
8:00 AM - 12:00 PM
Monday:
7:00 AM - 6:00 PM
Tuesday:
7:00 AM - 6:00 PM
Wednesday:
7:00 AM - 6:00 PM
Thursday:
7:00 AM - 6:00 PM
Friday:
7:00 AM - 6:00 PM
Saturday:
8:00 AM - 12:00 PM

Licensing

Insured

No License Required for Trade

Eco-friendly Accreditations

LEED Accredited Professional
No
Energy Star Partner
No
EPA Lead-Safe Certified
No
Use Green Products or Work Practices
Yes
State Contractor License Requirements

All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our State Contractor License Requirements page.

*Contact business to see additional licenses.


Service Categories

Heating and Air Conditioning,
Electrical,
Generator,
Drain Cleaning,
Wells and Pumps,
Water Filtration and Softening,
Water Heaters,
Plumbing

FAQ

GAC Services is currently rated 4.9 overall out of 5.

Sunday: 8:00 AM - 12:00 PM

Monday: 7:00 AM - 6:00 PM

Tuesday: 7:00 AM - 6:00 PM

Wednesday: 7:00 AM - 6:00 PM

Thursday: 7:00 AM - 6:00 PM

Friday: 7:00 AM - 6:00 PM

Saturday: 8:00 AM - 12:00 PM

GAC Services accepts the following forms of payment: Check,Discover,MasterCard,Visa
Yes, GAC Services offers free project estimates.
Yes, GAC Services offers eco-friendly accreditations.
No, GAC Services does not offer a senior discount.
No, GAC Services does not offer emergency services.
Yes, GAC Services offers warranties.
GAC Services offers the following services: HVAC, Duct Sealing, Cooling, Heating, Electric, Generators
Duct Cleaning

Contact information

227 E Deer Park Dr, Gaithersburg, MD 20877

http://www.GACServices.com

Service hours

Sunday:
8:00 AM - 12:00 PM
Monday:
7:00 AM - 6:00 PM
Tuesday:
7:00 AM - 6:00 PM
Wednesday:
7:00 AM - 6:00 PM
Thursday:
7:00 AM - 6:00 PM
Friday:
7:00 AM - 6:00 PM
Saturday:
8:00 AM - 12:00 PM