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ContractorsRanked

Best HVAC Contractors in Merrifield, VA (2026)

1,175 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Merrifield: CroppMetcalfe, CR Score 94/100; 4.8★ from 7,638 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): OHA HVAC, Plumbing, Chimney & Fireplaces, posts 24/7 hours; ranked #2 of 1,175.

  3. 10

    Most-reviewed: F.H. Furr Plumbing, Heating, Air Conditioning & Electrical, 17,172 Google reviews at 4.8★, the most of 1,175 ranked; ranked #10.

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

1,175 Merrifield HVAC contractors are ranked here by CR Score, from 8 published factors. 363 are open 24/7, 807 open Saturdays and 553 open Sundays, based on posted hours. The median Google rating is 4.9★ across 1,175 rated businesses.

Top 10 HVAC contractors in Merrifield at a glance

Top 10 HVAC contractors in Merrifield at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1CroppMetcalfe944.8★ (7,638)Fairfax, 1 mi away24/7Overall
2OHA HVAC, Plumbing, Chimney & Fireplaces934.9★ (1,794)Fairfax, 1 mi away24/7Emergencies
3Michael & Son Services934.7★ (15,537)Alexandria, 6 mi away24/7—
4John C. Flood924.8★ (4,976)Alexandria, 6 mi away24/7—
5AZA heating, cooling, plumbing & construction925.0★ (959)Alexandria, 6 mi away24/7—
6Krafft Service Corporation914.9★ (1,631)Alexandria, 7 mi away24/7—
7Nelson's HVAC, LLC914.9★ (627)Vienna, 2 mi away24/7—
8C.D. Shanahan's HVAC, Plumbing, Electrical & Remodeling LLC914.9★ (966)Springfield, 5 mi away24/7—
9Cardinal Plumbing Heating & Air Inc914.9★ (2,958)Sterling, 13 mi away24/7—
10F.H. Furr Plumbing, Heating, Air Conditioning & Electrical914.8★ (17,172)Manassas, 19 mi away24/7Most reviews

The 1,175 best HVAC contractors in Merrifield, 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 Merrifield

    #1 CroppMetcalfe

    Based in Fairfax, 1 mi away

    94/100CR Score

    Ranked #1 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

  4. #4 John C. Flood

    Based in Alexandria, 6 mi away

    92/100CR Score

    Ranked #4 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

  11. #11 GAC Services

    Based in Gaithersburg, 18 mi away

    90/100CR Score

    Ranked #11 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

  17. #17 United Air Temp

    Based in Alexandria, 8 mi away

    90/100CR Score

    Ranked #17 because of its Google rating and availability: 4.8★ from 1,318 Google reviews, open 24/7.

    • 4.8★ from 1,318 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    6094 Franconia Rd # B, Alexandria, VA 22310
    View profile for United Air Temp(703) 762-2488

  21. #21 United Air Temp

    Based in Springfield, 6 mi away

    89/100CR Score

    Ranked #21 because of its Google rating and availability: 4.9★ from 313 Google reviews, open 24/7.

    • 4.9★ from 313 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    5537 Hempstead Way suite a, Springfield, VA 22151
    View profile for United Air Temp(571) 336-8646

  23. #23 United Air Temp

    Based in Sterling, 13 mi away

    89/100CR Score

    Ranked #23 because of its Google rating and availability: 4.8★ from 2,161 Google reviews, open 24/7.

    • 4.8★ from 2,161 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    45570 Shepard Dr Ste. #6, Sterling, VA 20164
    View profile for United Air Temp(571) 888-8078

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 1,175 ranked HVAC contractors here; the rest are on their profiles.

HVAC contractors in Merrifield, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26F.H. Furr Plumbing, Heating, Air Conditioning & Electrical894.7★ (5,985)16 mi
27Caffi Services894.9★ (508)10 mi
28Sila Heating, Air Conditioning & Plumbing894.8★ (295)4 mi
29ACCURATE894.9★ (208)6 mi
30Commonwealth Cooling & Heating, LLC894.9★ (507)11 mi
31Len The Plumber Heating & Air, LLC894.6★ (8,136)15 mi
32Leonard Splaine Co.894.9★ (1,060)15 mi
33Cyprus Air Heating, Air Conditioning and Fireplaces894.8★ (908)11 mi
34John Nugent & Sons894.8★ (1,701)14 mi
35M.E. Flow894.8★ (866)11 mi
36Zone Control895.0★ (104)4 mi
37Air Treatment Heating & Cooling895.0★ (657)3 mi
38United Air Temp884.8★ (1,775)15 mi
39A Action Home Services884.9★ (326)9 mi
40B&B Air Conditioning & Heating Service885.0★ (357)14 mi
41Michael & Son Services884.8★ (993)13 mi
42M.E. Flow884.7★ (1,169)10 mi
43Michael Bonsby HVAC, Plumbing and Electrical884.8★ (2,138)17 mi
44Premier HVAC LLC885.0★ (230)11 mi
45McCarthy Services884.8★ (335)8 mi
46Meade's Heating and Air885.0★ (710)18 mi
47F.H. Furr Plumbing, Heating, Air Conditioning & Electrical884.8★ (2,314)18 mi
48Comfort Defender Heating & Air884.9★ (187)9 mi
49Pro Sky Services885.0★ (484)17 mi
50United Air Temp884.7★ (1,754)14 mi

Also serving Merrifield

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 Merrifield
BusinessGoogle ratingDistance
ABA Climate Control5.0★ (2)6 mi
Air Max HVACR5.0★ (2)5 mi
AJ Heating and AC, Inc.5.0★ (2)5 mi
Alta Vista Heating & Air Conditioning3.0★ (2)4 mi
ARS / Rescue Rooter4.5★ (5,934)15 mi
Home Services at The Home Depot5.0★ (2)3 mi
James Ozie's Heating & AC5.0★ (2)5 mi
McCarthy Services4.4★ (3,547)10 mi
Mister Mechanical, LLCIn Merrifield
Perfect Temp Heating & Cooling5.0★ (2)7 mi
Power, LLC5.0★ (2)5 mi
Precision Air Inc5.0★ (2)1 mi
Real service'sIn Merrifield
Rubio Mechanical Inc4.8★ (69)1 mi
Sears Window Replacement2.5★ (2)7 mi
Seasons Heating & AC2.0★ (1)In Merrifield
THE ELECTRICIANS3.0★ (2)5 mi
Tri-State Masters5.0★ (2)5 mi
UNIAIRE(Chantilly)3.0★ (2)5 mi
United Air Temp4.4★ (4,301)10 mi

How much do HVAC contractors cost in Merrifield?

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

How much do HVAC contractors cost in Merrifield?
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 Virginia

In Virginia, Virginia Board for Contractors (DPOR) licenses Contractor license with an HVAC specialty; HVAC technicians hold tradesman licenses.

  1. Search the business name or license number on the Virginia Board for Contractors (DPOR) license lookup.
  2. Check that the status is active and the name matches the contract or truck.
  3. 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 Virginia

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 Merrifield HVAC contractors

We scored 1,175 Merrifield 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 Merrifield 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 Merrifield: frequently asked questions

Who is the best HVAC contractor in Merrifield?

By CR Score, the highest-ranked HVAC contractor in Merrifield, VA is CroppMetcalfe with a CR Score of 94/100. It has 4.8★ from 7,638 Google reviews. It is open 24/7. OHA HVAC, Plumbing, Chimney & Fireplaces (#2) and Michael & Son Services (#3) follow. We ranked 1,175 HVAC contractors on 8 factors, last updated October 22, 2026.

How many HVAC contractors are there in Merrifield?

ContractorsRanked ranks 1,175 HVAC contractors serving Merrifield, VA. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.

Which HVAC contractors in Merrifield are open 24/7?

363 ranked HVAC contractors in Merrifield post 24/7 hours. The highest-ranked are CroppMetcalfe (#1), OHA HVAC, Plumbing, Chimney & Fireplaces (#2) and Michael & Son Services (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which HVAC contractors in Merrifield work on weekends?

807 of 1,175 ranked HVAC contractors post Saturday hours and 553 post Sunday hours. The highest-ranked open Saturdays are CroppMetcalfe (#1), OHA HVAC, Plumbing, Chimney & Fireplaces (#2) and Michael & Son Services (#3). Posted hours are office hours; crews may book weekend jobs separately.

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

In Virginia, Virginia Board for Contractors (DPOR) handles licensing and covers Contractor license with an HVAC specialty; HVAC technicians hold tradesman licenses. Search the business or license number at https://www.dpor.virginia.gov/LicenseLookup.

How much does ac replacement cost in Merrifield?

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 Merrifield. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Merrifield HVAC contractors have?

The median Google rating among 1,175 rated HVAC contractors in Merrifield is 4.9★, with a median of 23 reviews. F.H. Furr Plumbing, Heating, Air Conditioning & Electrical has the most, 17,172 reviews, and ranks #10. 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 Merrifield?

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 Merrifield

  1. October 2026: CR Scores recalculated for 1,175 hvac contractors serving Merrifield.
  2. October 2026: 10 duplicate listings merged.

More HVAC contractors and Merrifield pages

Other trades in Merrifield