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ContractorsRanked

Best HVAC Contractors in McHenry, IL (2026)

598 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in McHenry: Black Diamond Plumbing & Mechanical Inc., CR Score 95/100; 4.9★ from 6,580 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): McHenry Heating & Air, Inc., posts 24/7 hours; ranked #2 of 598.

  3. 8

    Most-reviewed: ABC Plumbing, Sewer, Heating, Cooling & Electric, 22,524 Google reviews at 4.7★, the most of 598 ranked; ranked #8.

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

598 McHenry HVAC contractors are ranked here by CR Score, from 8 published factors. 275 are open 24/7, 450 open Saturdays and 363 open Sundays, based on posted hours. The median Google rating is 4.9★ across 598 rated businesses.

Top 10 HVAC contractors in McHenry at a glance

Top 10 HVAC contractors in McHenry at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Black Diamond Plumbing & Mechanical Inc.954.9★ (6,580)McHenry24/7Overall
2McHenry Heating & Air, Inc.924.9★ (596)McHenry24/7Emergencies
324HR Home Comfort Services904.9★ (1,374)Lake in the Hills, 10 mi away24/7—
4Woodstock Heating, Cooling & Electrical904.9★ (1,222)Woodstock, 9 mi away24/7—
5Rellaire Smart Home Systems904.9★ (472)Crystal Lake, 6 mi away24/7—
6GSHA Services, LTD894.9★ (747)Woodstock, 9 mi away24/7—
7Lifeline Plumbing, Heating & Cooling894.9★ (3,222)Elgin, 17 mi away24/7—
8ABC Plumbing, Sewer, Heating, Cooling & Electric894.7★ (22,524)Arlington Heights, 20 mi away24/7Most reviews
9Legacy Home Services894.9★ (571)Crystal Lake, 8 mi away24/7—
10Premier Comfort Heating & Cooling LLC894.9★ (371)Fox Lake, 6 mi away24/7—

The 598 best HVAC contractors in McHenry, 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.

  25. #25 Absolute Comfort

    Based in Crystal Lake, 7 mi away

    88/100CR Score

    Ranked #25 because of its Google rating and availability: 4.8★ from 250 Google reviews, open 24/7.

    • 4.8★ from 250 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    60 W Terra Cotta Ave, Crystal Lake, IL 60014
    View profile for Absolute Comfort(815) 893-9276

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 598 ranked HVAC contractors here; the rest are on their profiles.

HVAC contractors in McHenry, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26American Star Total Home Comfort885.0★ (1,104)21 mi
27Duane Blanton Plumbing, Sewer, Heating & Cooling884.9★ (105)5 mi
28G & R Heating and Air884.8★ (2,067)17 mi
29JNL Climate Control, Inc.884.9★ (820)15 mi
30On The Mark Heating and Air885.0★ (939)20 mi
31TopTec Heating, Cooling, Plumbing & Electrical884.8★ (2,018)17 mi
32Allied Air Conditioning & Heating Corp.885.0★ (428)16 mi
33American Comfort Solution885.0★ (235)12 mi
34Leith Heating and Cooling Inc.885.0★ (784)19 mi
35McNally's Heating and Cooling885.0★ (116)9 mi
36American Comfort Central884.8★ (50)In McHenry
37Climate Control Services LLC885.0★ (776)20 mi
38Kustom Heating and Cooling885.0★ (1,021)21 mi
39Optimized Air885.0★ (72)6 mi
40AGM Heating & Cooling LLC874.9★ (147)8 mi
41South Shore Heating & Air Conditioning Inc.875.0★ (104)8 mi
42Air Blue Heating and Cooling875.0★ (148)11 mi
43Arctic Heating & Cooling874.9★ (102)7 mi
44Mr. Heating and Cooling Inc875.0★ (283)15 mi
45Northern Comfort Heating Air Conditioning Duct Cleaning,Inc874.9★ (240)11 mi
46Air Solutions874.9★ (931)6 mi
47AA Service Co.874.9★ (3,150)25 mi
48Five Star Heating & Air, Inc.874.9★ (1,082)20 mi
49Lake County Mechanical874.9★ (374)14 mi
50Aire Serv of Palatine874.9★ (766)18 mi

Also serving McHenry

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 McHenry
BusinessGoogle ratingDistance
A & J General5.0★ (2)10 mi
A Hartlett & Son4.5★ (2)9 mi
Alex’s Duct Cleaning5.0★ (269)6 mi
Anthonys Heating & Air3.0★ (2)6 mi
Bill's Heating and Cooling Service5.0★ (2)In McHenry
BP HEATING LLC5.0★ (2)18 mi
Central Plumbing, Heating & Cooling Co.In McHenry
Comfort Air Heating & Cooling Inc4.7★ (185)5 mi
Conservative Heating & Air Conditioning3.0★ (2)14 mi
CRS Heating & Air Conditioning, Inc.4.6★ (79)In McHenry
Eagle Refrigeration Service4.5★ (2)5 mi
Four Seasons Heating, Air Conditioning, Plumbing, Electric4.7★ (2,787)19 mi
Koch Indoor Weather Inc5.0★ (1)In McHenry
Magic HVAC Inc5.0★ (2)8 mi
Mannina Creations5.0★ (2)14 mi
McHenry Air Conditioning Service5.0★ (1)In McHenry
Nick's Action Air5.0★ (2)12 mi
Thermal Mechanical Inc.3.0★ (2)13 mi
TM HVAC contractor5.0★ (2)13 mi
Vita HVAC Services5.0★ (2)9 mi

How much do HVAC contractors cost in McHenry?

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

How much do HVAC contractors cost in McHenry?
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

When to hire an HVAC contractor in Illinois

In Illinois, furnace and heat pump calls peak in the coldest winter weeks and AC calls in summer heat waves. Spring and fall are the easiest times to book maintenance or a replacement.

How we ranked McHenry HVAC contractors

We scored 598 McHenry 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 McHenry 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 McHenry: frequently asked questions

Who is the best HVAC contractor in McHenry?

By CR Score, the highest-ranked HVAC contractor in McHenry, IL is Black Diamond Plumbing & Mechanical Inc. with a CR Score of 95/100. It has 4.9★ from 6,580 Google reviews. It is open 24/7. McHenry Heating & Air, Inc. (#2) and 24HR Home Comfort Services (#3) follow. We ranked 598 HVAC contractors on 8 factors, last updated October 22, 2026.

How many HVAC contractors are there in McHenry?

ContractorsRanked ranks 598 HVAC contractors serving McHenry, IL. 4 of them are based in McHenry; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.

Which HVAC contractors in McHenry are open 24/7?

275 ranked HVAC contractors in McHenry post 24/7 hours. The highest-ranked are Black Diamond Plumbing & Mechanical Inc. (#1), McHenry Heating & Air, Inc. (#2) and 24HR Home Comfort Services (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which HVAC contractors in McHenry work on weekends?

450 of 598 ranked HVAC contractors post Saturday hours and 363 post Sunday hours. The highest-ranked open Saturdays are Black Diamond Plumbing & Mechanical Inc. (#1), McHenry Heating & Air, Inc. (#2) and 24HR Home Comfort Services (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does ac replacement cost in McHenry?

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

What Google rating do McHenry HVAC contractors have?

The median Google rating among 598 rated HVAC contractors in McHenry is 4.9★, with a median of 26 reviews. ABC Plumbing, Sewer, Heating, Cooling & Electric has the most, 22,524 reviews, and ranks #8. 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 McHenry?

In Illinois, furnace and heat pump calls peak in the coldest winter weeks and AC calls in summer heat waves. Spring and fall are the easiest times to book maintenance or a replacement.

How does ContractorsRanked rank HVAC contractors?

Each HVAC contractor gets a 0–100 CR Score from 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.

Update log for McHenry

  1. October 2026: CR Scores recalculated for 598 hvac contractors serving McHenry.
  2. October 2026: 6 duplicate listings merged.

More HVAC contractors and McHenry pages

Other trades in McHenry