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Best HVAC companies in Rockville, MD

The highest-scoring HVAC company in and near Rockville is GAC Services (score 90, 4.9 stars from 7,927 Google reviews). 40 companies meet the 5 Star standard within 25 km; the top 30 are ranked below.

Last updated Sep 25, 2026How we rank
  1. 1

    GAC Services

    4.9 · 7,927 Google reviewsGaithersburg, MD56 years in business
    Emergency serviceFinancing available
    90SCORE
    (301) 202-1641 WebsiteFull profile
  2. 2

    Len The Plumber Heating & Air, LLC

    4.9 · 2,312 Google reviewsBeltsville, MD
    82SCORE
    (410) 316-6812 WebsiteFull profile
  3. 3

    John C. Flood

    4.8 · 490 Google reviewsBrentwood, MD122 years in business
    Free estimatesEmergency serviceFinancing available
    80SCORE
    (301) 962-2319 WebsiteFull profile
  4. 4

    Chandler's Plumbing & Heating

    4.9 · 1,019 Google reviewsFalls Church, VA
    79SCORE
    (703) 536-4750 WebsiteFull profile
  5. 5

    NARFIX HEATING AND AIR CONDITIONING LLC

    5.0 · 309 Google reviewsSilver Spring, MD
    79SCORE
    (240) 919-9952 WebsiteFull profile
  6. 6

    B&B Air Conditioning & Heating Service

    4.9 · 709 Google reviewsRockville, MD
    78SCORE
    (301) 965-1890 WebsiteFull profile
  7. 7

    Glenmont Heating & Air Conditioning

    4.9 · 498 Google reviewsRockville, MD
    77SCORE
    (301) 468-2665 WebsiteFull profile
  8. 8

    D&A Heating & Cooling

    4.9 · 464 Google reviewsHyattsville, MD
    77SCORE
    (240) 294-4470 WebsiteFull profile
  9. 9

    DC AIR CONDITIONING &Heating

    4.9 · 455 Google reviewsWashington, DC
    77SCORE
    (202) 985-8885 WebsiteFull profile
  10. 10

    Metro Services HVAC

    4.9 · 421 Google reviewsGaithersburg, MD7 years in business
    Emergency serviceFinancing available
    77SCORE
    (240) 676-1804 WebsiteFull profile
  11. 11

    B.L. James & Son

    4.9 · 431 Google reviewsArlington, VA
    75SCORE
    (571) 456-3196 WebsiteFull profile
  12. 12

    United Service Specialists

    4.9 · 278 Google reviewsCollege Park, MD
    75SCORE
    (301) 241-9200 WebsiteFull profile
  13. 13

    F.H. Furr Plumbing, Heating, Air Conditioning & Electrical

    4.7 · 6,786 Google reviewsRockville, MD
    74SCORE
    (703) 497-0180 WebsiteFull profile
  14. 14

    Lowe's Air Duct Cleaning

    4.9 · 807 Google reviewsArlington, VA
    74SCORE
    (703) 652-4600 WebsiteFull profile
  15. 15

    Castro Electrical Services

    4.8 · 458 Google reviewsRockville, MD
    73SCORE
    (240) 907-5421 WebsiteFull profile
  16. 16

    Rios HVAC Services, LLC.

    5.0 · 142 Google reviewsMt Rainier, MD
    73SCORE
    (202) 257-7658 WebsiteFull profile
  17. 17

    Sila Heating, Air Conditioning & Plumbing

    4.7 · 1,752 Google reviewsBeltsville, MD
    72SCORE
    (240) 775-1724 WebsiteFull profile
  18. 18

    Cyprus Air Heating, Cooling and Fireplaces

    4.7 · 1,589 Google reviewsRockville, MD
    72SCORE
    (301) 453-5050 WebsiteFull profile
  19. 19

    Vito Services

    4.7 · 1,526 Google reviewsRockville, MD
    72SCORE
    (301) 861-3908 WebsiteFull profile
  20. 20

    One Hour Air Conditioning & Heating®

    4.8 · 379 Google reviewsRockville, MD
    72SCORE
    (301) 396-7481 WebsiteFull profile
  21. 21

    Thomas E Clark Inc

    4.8 · 336 Google reviewsSilver Spring, MD
    71SCORE
    (301) 608-0550 WebsiteFull profile
  22. 22

    PipeWorks Plumbing, Heating and Air

    4.9 · 412 Google reviewsBethesda, MD
    70SCORE
    (301) 679-5000 WebsiteFull profile
  23. 23

    CHEVEZ HVAC, INC

    4.9 · 104 Google reviewsUniversity Park, MD
    70SCORE
    (301) 404-1018 WebsiteFull profile
  24. 24

    Heating Ventilation Air Conditioning Mechanical Service

    5.0 · 89 Google reviewsWashington, DC
    70SCORE
    (202) 480-1337 WebsiteFull profile
  25. 25

    Matthews Mechanical

    4.9 · 88 Google reviewsWashington, DC
    69SCORE
    (202) 722-2844 WebsiteFull profile
  26. 26

    Argent Heating Cooling and Plumbing

    4.7 · 473 Google reviewsFairfax, VA
    68SCORE
    (703) 255-1392 WebsiteFull profile
  27. 27

    Anthony HVAC Services LLC

    4.9 · 68 Google reviewsBeltsville, MD
    68SCORE
    WebsiteFull profile
  28. 28

    AMS Air Conditioning & Heating

    4.9 · 127 Google reviewsRockville, MD
    67SCORE
    (240) 899-5777 WebsiteFull profile
  29. 29

    Tony & Sons Air Duct Cleaning

    4.9 · 68 Google reviewsWashington, DC
    67SCORE
    (202) 751-3300 WebsiteFull profile
  30. 30

    Richard's Heating & Air Conditioning

    4.8 · 639 Google reviewsFalls Church, VA
    66SCORE
    (703) 241-1900 WebsiteFull profile

Compare the top 10

Top HVAC companies in Rockville by 5 Star Score
#CompanyScoreGoogle ratingReviewsYearsBased in
1GAC Services904.97,92756Gaithersburg
2Len The Plumber Heating & Air, LLC824.92,312–Beltsville
3John C. Flood804.8490122Brentwood
4Chandler's Plumbing & Heating794.91,019–Falls Church
5NARFIX HEATING AND AIR CONDITIONING LLC795.0309–Silver Spring
6B&B Air Conditioning & Heating Service784.9709–Rockville
7Glenmont Heating & Air Conditioning774.9498–Rockville
8D&A Heating & Cooling774.9464–Hyattsville
9DC AIR CONDITIONING &Heating774.9455–Washington
10Metro Services HVAC774.94217Gaithersburg

HVAC companies in Rockville: quick answers

Who is the highest-rated HVAC company in Rockville, MD?

GAC Services has the highest 5 Star Score among HVAC companies in and near Rockville: 90 out of 100, with a 4.9 star Google rating from 7,927 reviews.

How many 5 Star HVAC companies serve Rockville?

40 HVAC companies meet our standard within 25 km of Rockville: at least a 4.5 star rating, 20 or more reviews and a score of 60 or higher. The top 30 have 31,156 Google reviews between them, averaging 4.86 stars.

How are these HVAC companies ranked?

By 5 Star Score: rating quality adjusted for review count (45 points), review volume (25), review recency (15), years in business (10) and license verification (5). Businesses cannot pay to change their score.

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Ratings and review counts come from each company's public Google listing and are re-checked monthly. 5 Star Home Service Pros is independent; companies cannot pay for placement.