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ContractorsRanked

Best HVAC Contractors in Forest Glen, MD (2026)

1,144 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Forest Glen: GAC Services, CR Score 92/100; 4.9★ from 6,908 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Len The Plumber Heating & Air, LLC, posts 24/7 hours; ranked #2 of 1,144.

  3. 6

    Most-reviewed: Michael & Son Services, 15,537 Google reviews at 4.7★, the most of 1,144 ranked; ranked #6.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

1,144 Forest Glen HVAC contractors are ranked here by CR Score, from 8 published factors. 337 are open 24/7, 768 open Saturdays and 529 open Sundays, based on posted hours. The median Google rating is 4.8★ across 1,144 rated businesses.

Top 10 HVAC contractors in Forest Glen at a glance

Top 10 HVAC contractors in Forest Glen at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1GAC Services924.9★ (6,908)Gaithersburg, 11 mi away24/7Overall
2Len The Plumber Heating & Air, LLC924.6★ (8,136)Silver Spring, 2 mi away24/7Emergencies
3F.H. Furr Plumbing, Heating, Air Conditioning & Electrical914.7★ (5,985)Rockville, 7 mi away24/7—
4CroppMetcalfe914.8★ (7,638)Fairfax, 14 mi away24/7—
5NARFIX HEATING AND AIR CONDITIONING LLC905.0★ (293)Silver Spring, 4 mi away24/7—
6Michael & Son Services904.7★ (15,537)Alexandria, 16 mi away24/7Most reviews
7Presidential, Inc.904.9★ (1,701)Gaithersburg, 12 mi away24/7—
8Thomas E Clark Inc904.8★ (299)Silver Spring, 1 mi away24/7—
9OHA HVAC, Plumbing, Chimney & Fireplaces904.9★ (1,794)Fairfax, 13 mi away24/7—
10Tim Whistler Plumbing, Gas Fitting, HVAC, and Electrical904.8★ (291)Silver Spring, 1 mi away24/7—

The 1,144 best HVAC contractors in Forest Glen, ranked

Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.

Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  1. Ranked #1 in Forest Glen

    #1 GAC Services

    Based in Gaithersburg, 11 mi away

    92/100CR Score

    Ranked #1 because of its Google rating and availability: 4.9★ from 6,908 Google reviews, open 24/7.

    • 4.9★ from 6,908 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    227 E Deer Park Dr, Gaithersburg, MD 20877
    View profile for GAC Services(301) 202-1641

  4. #4 CroppMetcalfe

    Based in Fairfax, 14 mi away

    91/100CR Score

    Ranked #4 because of its Google rating and availability: 4.8★ from 7,638 Google reviews, open 24/7.

    • 4.8★ from 7,638 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    8421 Hilltop Rd, Fairfax, VA 22031
    View profile for CroppMetcalfe(703) 420-5030

  6. #6 Michael & Son Services

    Based in Alexandria, 16 mi away

    90/100CR Score

    Ranked #6 because of its Google rating and review volume: 4.7★ from 15,537 Google reviews, the most Google reviews on this list (15,537).

    • 4.7★ from 15,537 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5740 General Washington Dr, Alexandria, VA 22312
    View profile for Michael & Son Services(800) 948-6453

  12. #12 John C. Flood

    Based in Alexandria, 16 mi away

    90/100CR Score

    Ranked #12 because of its Google rating and availability: 4.8★ from 4,976 Google reviews, open 24/7.

    • 4.8★ from 4,976 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    6430 General Green Way, Alexandria, VA 22312
    View profile for John C. Flood(571) 605-7008

  15. #15 United Air Temp

    Based in Greenbelt, 10 mi away

    89/100CR Score

    Ranked #15 because of its Google rating and availability: 4.8★ from 1,306 Google reviews, open 24/7.

    • 4.8★ from 1,306 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    7255 Hanover Pkwy Ste A, Greenbelt, MD 20770
    View profile for United Air Temp(240) 713-3314

  21. #21 United Air Temp

    Based in Fort Washington, 15 mi away

    89/100CR Score

    Ranked #21 because of its Google rating and availability: 4.8★ from 1,775 Google reviews, open 24/7.

    • 4.8★ from 1,775 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5620 St Barnabas Rd Ste 240, Fort Washington, MD 20744
    View profile for United Air Temp(240) 342-3956

HVAC contractors ranked #26 to #50

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 1,144 ranked HVAC contractors here; the rest are on their profiles.

HVAC contractors in Forest Glen, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Michael & Son Services884.8★ (8,326)12 mi
27C.D. Shanahan's HVAC, Plumbing, Electrical & Remodeling LLC884.9★ (966)17 mi
28Nelson's HVAC, LLC884.9★ (627)15 mi
29Caffi Services884.9★ (508)14 mi
30Michael & Son Services884.9★ (1,501)20 mi
31AMS Air Conditioning & Heating884.9★ (116)6 mi
32Belair Engineering and Service Company, Inc.884.9★ (1,421)20 mi
33Cool Breeze Plumbing, Heating & A/C884.8★ (666)12 mi
34EzGreen Air Duct And Dryer Vent Cleaning884.9★ (90)4 mi
35Cycle Heating and Cooling, LLC884.9★ (77)3 mi
36Environmental Systems Associates884.9★ (658)16 mi
37Metro Services HVAC884.9★ (298)12 mi
38AVS Heating and Air Conditioning Bethesda - Appliance, Heating, AC Install, Repair Maintenance Service884.8★ (104)3 mi
39Grove Heating & Cooling884.9★ (1,156)20 mi
40United Air Temp884.8★ (1,318)17 mi
41AG Services – Electrical, Air Conditioning, Heating & Plumbing884.9★ (440)14 mi
42Su' Coy Heating, AC & Duct Cleaning884.9★ (205)10 mi
43Cardinal Plumbing Heating & Air Inc874.9★ (745)18 mi
44United Air Temp874.8★ (2,161)20 mi
45John Nugent & Sons874.8★ (1,701)19 mi
46Service Force Plumbing874.9★ (374)2 mi
47Magnolia Plumbing, Heating & Cooling874.4★ (1,519)5 mi
48Shemtov Systems Heating & Air Conditioning874.9★ (57)3 mi
49F.H. Furr Plumbing, Heating, Air Conditioning & Electrical874.7★ (4,469)21 mi
50Heating Ventilation Air Conditioning Mechanical Service875.0★ (71)8 mi

Also serving Forest Glen

20 more HVAC contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.

Unranked HVAC contractors serving Forest Glen
BusinessGoogle ratingDistance
Barivo HVAC Repair Washington5.0★ (2)8 mi
Conrod's Plumbing Heating and A/C5.0★ (2)2 mi
Coreno HVAC Repair Washington5.0★ (2)8 mi
DMV Mechanical3.0★ (2)2 mi
Energy Systems Inc3.0★ (2)5 mi
Helino HVAC Repair Washington5.0★ (2)8 mi
Heravo HVAC Repair Washington5.0★ (2)8 mi
JC & JC HVAC4.7★ (503)7 mi
JDL HVAC & Plumbing Services4.8★ (678)12 mi
Kensington Cooling & Heating5.0★ (2)2 mi
Owens & Johnsons Heating and Cooling3.0★ (2)6 mi
Pavilo HVAC Repair Washington5.0★ (2)8 mi
R And R Climate Control Inc5.0★ (2)5 mi
R D Springer Plumbing & Heating5.0★ (2)5 mi
S.L. Johnson Plumbing & Heating3.0★ (2)7 mi
Teravo HVAC Repair Washington5.0★ (2)8 mi
Vito Services4.7★ (1,351)7 mi
Xavino HVAC Repair Washington5.0★ (2)8 mi
Xoravo HVAC Repair Washington5.0★ (2)8 mi
Zelavo HVAC Repair Washington5.0★ (2)8 mi

How much do HVAC contractors cost in Forest Glen?

National price ranges in USD, not adjusted for Forest Glen. Each row names its basis and the month we checked it.

How much do HVAC contractors cost in Forest Glen?
JobLowTypicalHighBasisChecked
AC replacement$3,887$5,978$8,073Per system, installed (unit plus labor); typical range of customer-reported jobs. US national rangeOctober 2026
Furnace replacement$2,823$4,814$6,896Per system, installed; typical range of customer-reported jobs. US national rangeOctober 2026

How to check an HVAC contractor's license in Maryland

In Maryland, Maryland State Board of Heating, Ventilation, Air-Conditioning and Refrigeration Contractors licenses Heating, ventilation, air conditioning and refrigeration work.

  1. Check that the status is active and the name matches the contract or truck.
  2. Ask for proof of insurance before work starts.

No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.

Guide checked October 2026. How we verify licenses

When to hire an HVAC contractor in Maryland

HVAC demand peaks in summer for cooling and in winter for heating. Spring and fall are the easiest times to book maintenance or a replacement.

How we ranked Forest Glen HVAC contractors

We scored 1,144 Forest Glen HVAC contractors on 8 factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 2026.

Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Forest Glen data
Reputation35%Bayesian-adjusted Google star ratingMeasured
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2Not yet collected
Review volume10%log10(reviews + 1) against the list maximumMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5Measured
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radiusMeasured
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)Measured

HVAC contractors in Forest Glen: frequently asked questions

Who is the best HVAC contractor in Forest Glen?

By CR Score, the highest-ranked HVAC contractor in Forest Glen, MD is GAC Services with a CR Score of 92/100. It has 4.9★ from 6,908 Google reviews. It is open 24/7. Len The Plumber Heating & Air, LLC (#2) and F.H. Furr Plumbing, Heating, Air Conditioning & Electrical (#3) follow. We ranked 1,144 HVAC contractors on 8 factors, last updated October 22, 2026.

How many HVAC contractors are there in Forest Glen?

ContractorsRanked ranks 1,144 HVAC contractors serving Forest Glen, MD. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.

Which HVAC contractors in Forest Glen are open 24/7?

337 ranked HVAC contractors in Forest Glen post 24/7 hours. The highest-ranked are GAC Services (#1), Len The Plumber Heating & Air, LLC (#2) and F.H. Furr Plumbing, Heating, Air Conditioning & Electrical (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which HVAC contractors in Forest Glen work on weekends?

768 of 1,144 ranked HVAC contractors post Saturday hours and 529 post Sunday hours. The highest-ranked open Saturdays are GAC Services (#1), Len The Plumber Heating & Air, LLC (#2) and F.H. Furr Plumbing, Heating, Air Conditioning & Electrical (#3). Posted hours are office hours; crews may book weekend jobs separately.

How do I check an HVAC contractor's license in Maryland?

In Maryland, Maryland State Board of Heating, Ventilation, Air-Conditioning and Refrigeration Contractors handles licensing and covers Heating, ventilation, air conditioning and refrigeration work.

How much does ac replacement cost in Forest Glen?

AC replacement typically costs $3,887 to $8,073, with $5,978 typical (Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Forest Glen. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Forest Glen HVAC contractors have?

The median Google rating among 1,144 rated HVAC contractors in Forest Glen is 4.8★, with a median of 22 reviews. Michael & Son Services has the most, 15,537 reviews, and ranks #6. We adjust ratings for review count, so a few five-star reviews cannot top the list.

When is the best time to hire an HVAC contractor in Forest Glen?

HVAC demand peaks in summer for cooling and in winter for heating. Spring and fall are the easiest times to book maintenance or a replacement.

Update log for Forest Glen

  1. October 2026: CR Scores recalculated for 1,144 hvac contractors serving Forest Glen.
  2. October 2026: 11 duplicate listings merged.

More HVAC contractors and Forest Glen pages

Other trades in Forest Glen