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). 43 companies meet the 5 Star standard within about 16 miles; the top 30 are ranked below.

Last updated Nov 1, 2026How we rank
  1. 1

    GAC Services

    4.9 · 7,927 Google reviewsGaithersburg, MD56 years in business

    GAC Services is a family-owned and operated HVAC, plumbing, and electrical company that has served Maryland since 1970. The company works with residential and commercial customers in Gaithersburg and across Montgomery…

    Emergency serviceFinancing available
    90SCORE
  2. 2

    Len The Plumber Heating & Air, LLC

    4.9 · 2,579 Google reviewsBeltsville, MD

    Len The Plumber Heating & Air, LLC provides plumbing, drain, sewer, air conditioning, and heating services in the Washington, D.C. area. The company performs repair, replacement, and maintenance for home plumbing and…

    Emergency service
    82SCORE
  3. 3

    Chandler's Plumbing & Heating

    4.9 · 1,085 Google reviewsFalls Church, VA
    80SCORE
  4. 4

    B&B Air Conditioning & Heating Service

    4.9 · 823 Google reviewsRockville, MD
    79SCORE
  5. 5

    NARFIX HEATING AND AIR CONDITIONING LLC

    5.0 · 315 Google reviewsSilver Spring, MD
    79SCORE
  6. 6

    Lowe's Air Duct Cleaning

    4.9 · 816 Google reviewsArlington, VA
    78SCORE
  7. 7

    D&A Heating & Cooling

    4.9 · 474 Google reviewsHyattsville, MD
    77SCORE
  8. 8

    DC AIR CONDITIONING &Heating

    4.9 · 464 Google reviewsWashington, DC
    77SCORE
  9. 9

    John C. Flood

    4.7 · 502 Google reviewsBrentwood, MD122 years in business
    Free estimatesEmergency serviceFinancing available
    76SCORE
  10. 10

    Glenmont Heating & Air Conditioning

    4.9 · 499 Google reviewsRockville, MD
    76SCORE
  11. 11

    Metro Services HVAC

    4.9 · 421 Google reviewsGaithersburg, MD7 years in business
    Emergency serviceFinancing available
    76SCORE
  12. 12

    United Service Specialists

    4.9 · 284 Google reviewsCollege Park, MD
    75SCORE
  13. 13

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

    4.7 · 6,914 Google reviewsRockville, MD
    74SCORE
  14. 14

    Richard's Heating & Air Conditioning

    4.8 · 653 Google reviewsFalls Church, VA
    74SCORE
  15. 15

    B.L. James & Son

    4.9 · 431 Google reviewsArlington, VA
    74SCORE
  16. 16

    Castro Electrical Services

    4.8 · 487 Google reviewsRockville, MD
    73SCORE
  17. 17

    Sila Heating, Air Conditioning & Plumbing

    4.7 · 1,762 Google reviewsBeltsville, MD
    72SCORE
  18. 18

    Cyprus Air Heating, Cooling and Fireplaces

    4.7 · 1,596 Google reviewsRockville, MD
    72SCORE
  19. 19

    Vito Services

    4.7 · 1,535 Google reviewsRockville, MD
    72SCORE
  20. 20

    One Hour Air Conditioning & Heating®

    4.8 · 387 Google reviewsRockville, MD
    72SCORE
  21. 21

    Rios HVAC Services, LLC.

    5.0 · 144 Google reviewsMt Rainier, MD
    72SCORE
  22. 22

    Thomas E Clark Inc

    4.8 · 342 Google reviewsSilver Spring, MD
    71SCORE
  23. 23

    PipeWorks Plumbing, Heating and Air

    4.9 · 416 Google reviewsBethesda, MD
    70SCORE
  24. 24

    CHEVEZ HVAC, INC

    4.9 · 107 Google reviewsUniversity Park, MD
    70SCORE
  25. 25

    Matthews Mechanical

    4.9 · 95 Google reviewsWashington, DC
    70SCORE
  26. 26

    Tony & Sons Air Duct Cleaning

    4.9 · 78 Google reviewsWashington, DC
    70SCORE
  27. 27

    Argent Heating Cooling and Plumbing

    4.7 · 473 Google reviewsFairfax, VA
    69SCORE
  28. 28

    Heating Ventilation Air Conditioning Mechanical Service

    5.0 · 88 Google reviewsWashington, DC
    69SCORE
  29. 29

    Anthony HVAC Services LLC

    4.9 · 68 Google reviewsBeltsville, MD
    67SCORE
  30. 30

    AMS Air Conditioning & Heating

    4.9 · 127 Google reviewsRockville, MD
    66SCORE

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, LLC824.92,579–Beltsville
3Chandler's Plumbing & Heating804.91,085–Falls Church
4B&B Air Conditioning & Heating Service794.9823–Rockville
5NARFIX HEATING AND AIR CONDITIONING LLC795.0315–Silver Spring
6Lowe's Air Duct Cleaning784.9816–Arlington
7D&A Heating & Cooling774.9474–Hyattsville
8DC AIR CONDITIONING &Heating774.9464–Washington
9John C. Flood764.7502122Brentwood
10Glenmont Heating & Air Conditioning764.9499–Rockville

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?

43 HVAC companies meet our standard within about 16 miles of Rockville: at least a 4.5 star rating, 20 or more reviews and a score of 60 or higher. The top 30 have 31,892 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.

HVAC companies near Rockville

Other pros in Rockville

Search another area

Try a zip code, a nearby city, or a state.

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.