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ContractorsRanked

Best HVAC Contractors in Saint John, MO (2026)

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

The short answer

  1. 1

    Best overall in Saint John: Classic Aire Care, CR Score 94/100; 4.9★ from 4,820 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Hoffmann Brothers, posts 24/7 hours; ranked #2 of 476.

  3. 9

    Most-reviewed: Hoffmann Brothers, 10,949 Google reviews at 4.9★, the most of 476 ranked; ranked #9.

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

476 Saint John HVAC contractors are ranked here by CR Score, from 8 published factors. 160 are open 24/7, 307 open Saturdays and 255 open Sundays, based on posted hours. The median Google rating is 4.9★ across 476 rated businesses.

Top 10 HVAC contractors in Saint John at a glance

Top 10 HVAC contractors in Saint John at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Classic Aire Care944.9★ (4,820)St. Louis, 3 mi away24/7Overall
2Hoffmann Brothers944.9★ (5,847)St. Louis, 5 mi away24/7Emergencies
3Academy Air Heating, Cooling, Plumbing and Electric934.8★ (6,727)Hazelwood, 6 mi away24/7—
4Air Comfort Service, Inc.934.9★ (2,041)Hazelwood, 4 mi away24/7—
5B & B Heating & Cooling924.9★ (1,285)Florissant, 5 mi away24/7—
6Jerry Kelly Heating & Air Conditioning924.9★ (6,530)Saint Peters, 15 mi away24/7—
7B & B Heating & Cooling915.0★ (1,348)Saint Charles, 11 mi away24/7—
8Morrison Plumbing, Heating, Air, & Electrical Services914.9★ (8,631)Collinsville, 18 mi away24/7—
9Hoffmann Brothers914.9★ (10,949)Brentwood, 6 mi awaySat · Sun · EveningsMost reviews
10Chesterfield Service914.9★ (4,286)Chesterfield, 15 mi away24/7—

The 476 best HVAC contractors in Saint John, 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 Saint John

    #1 Classic Aire Care

    Based in St. Louis, 3 mi away

    94/100CR Score

    Ranked #1 because of its Google rating and availability: 4.9★ from 4,820 Google reviews, open 24/7.

    • 4.9★ from 4,820 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1276 N Warson Rd, St. Louis, MO 63132
    View profile for Classic Aire Care(314) 988-2501

  2. #2 Hoffmann Brothers

    Based in St. Louis, 5 mi away

    94/100CR Score

    Ranked #2 because of its Google rating and availability: 4.9★ from 5,847 Google reviews, open 24/7.

    • 4.9★ from 5,847 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2043 Woodland Pkwy #100, St. Louis, MO 63146
    View profile for Hoffmann Brothers(314) 880-7437

  9. #9 Hoffmann Brothers

    Based in Brentwood, 6 mi away

    91/100CR Score

    Ranked #9 because of its Google rating and review volume: 4.9★ from 10,949 Google reviews, the most Google reviews on this list (10,949).

    • 4.9★ from 10,949 Google reviews
    Hours
    Mon–Sun 6 AM–9 PM
    Address
    1025 Hanley Industrial Ct, Brentwood, MO 63144
    View profile for Hoffmann Brothers(314) 347-1403

  10. #10 Chesterfield Service

    Based in Chesterfield, 15 mi away

    91/100CR Score

    Ranked #10 because of its Google rating and availability: 4.9★ from 4,286 Google reviews, open 24/7.

    • 4.9★ from 4,286 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    245 Chesterfield Industrial Blvd, Chesterfield, MO 63005
    View profile for Chesterfield Service(636) 837-1949

  17. #17 Scott-Lee Company

    Based in St. Louis, 14 mi away

    90/100CR Score

    Ranked #17 because of its Google rating and availability: 4.9★ from 2,175 Google reviews, open 24/7.

    • 4.9★ from 2,175 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    11010 Gravois Industrial Ct, St. Louis, MO 63128
    View profile for Scott-Lee Company(314) 828-8505

  18. #18 Classic Aire Care

    Based in Ballwin, 14 mi away

    90/100CR Score

    Ranked #18 because of its Google rating and availability: 5.0★ from 1,014 Google reviews, open 24/7.

    • 5.0★ from 1,014 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    930 Kehrs Mill Rd suite 325-9, Ballwin, MO 63011
    View profile for Classic Aire Care(636) 200-8250

  19. #19 Hoffmann Brothers

    Based in Edwardsville, 21 mi away

    90/100CR Score

    Ranked #19 because of its Google rating and availability: 4.9★ from 5,405 Google reviews, open 24/7.

    • 4.9★ from 5,405 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1254 University Dr Suite 800, Edwardsville, IL 62025
    View profile for Hoffmann Brothers(618) 271-6200

  24. #24 Integrity Aire

    Based in Saint Charles, 11 mi away

    89/100CR Score

    Ranked #24 because of its Google rating and availability: 5.0★ from 288 Google reviews, open 24/7.

    • 5.0★ from 288 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1382 Charlestown Industrial Dr, St Charles, MO 63303
    View profile for Integrity Aire(314) 803-3664

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

HVAC contractors in Saint John, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Premier, Inc894.9★ (422)10 mi
27Xcell Williams894.8★ (141)1 mi
28Jersey heating and cooling llc895.0★ (163)8 mi
29Classic Aire Care895.0★ (1,039)19 mi
30Stay Cool Climate Control895.0★ (1,068)20 mi
31Martin Jetco Heating & Air Conditioning894.9★ (1,177)17 mi
32Hosack Plumbing, Heating & Cooling894.9★ (153)7 mi
33Classic Aire Care885.0★ (1,160)21 mi
34No Problem Heating and Cooling884.8★ (1,113)15 mi
35All American Appliance Service,LLC.884.7★ (2,264)3 mi
36Tiger Plumbing, Heating, Air Conditioning, & Electrical Services884.7★ (5,072)20 mi
37Aire Serv of St. Louis884.9★ (221)11 mi
38BELOMAN884.9★ (1,500)21 mi
39Hosack Plumbing, Heating & Cooling885.0★ (696)20 mi
40Comfort Experts, Inc885.0★ (355)17 mi
41Faszold Heating and Cooling884.9★ (873)19 mi
42Design Aire Heating & Cooling - St. Louis885.0★ (926)10 mi
43Viviano Heating & Air Conditioning, Inc.884.9★ (890)20 mi
44Swiss, LLC884.9★ (924)20 mi
45Ozark Mechanical875.0★ (160)14 mi
46Polar Plumbing, Heating & Air Conditioning875.0★ (514)21 mi
47Home Heating & Cooling875.0★ (586)23 mi
48American Heating & Air Conditioning875.0★ (40)7 mi
49Raydel Heating and Cooling875.0★ (101)13 mi
50Hoffmann Brothers874.9★ (5,170)8 mi

Also serving Saint John

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 Saint John
BusinessGoogle ratingDistance
Advanced Heating Cooling and Refrigeration5.0★ (2)17 mi
Bechtold Residential Concepts5.0★ (2)17 mi
Brentwood Heating, Cooling & Duct Cleaning5.0★ (2)14 mi
Coleman Heating and Sheet Metal5.0★ (2)7 mi
Dee Heating and Cooling5.0★ (2)7 mi
Elite Heating & Cooling1.0★ (2)6 mi
Elm Heating & Air Conditioning5.0★ (2)15 mi
Gene's Appliance AC & Heating4.9★ (207)16 mi
Golden Touch Hvac of Maryland Heights5.0★ (2)6 mi
Nation-Wide Refrigeration Inc5.0★ (2)10 mi
Optimal Heating and Cooling5.0★ (2)11 mi
Saint Peters Heating & Air Conditioning5.0★ (2)16 mi
Sears Heating and Air Conditioning2.0★ (2)6 mi
SMART St. Louis5.0★ (2)3 mi
Stellar Heating and Air Conditioning5.0★ (2)9 mi
TC Heating and Cooling5.0★ (2)12 mi
Triple L3.5★ (2)11 mi
Weis Comfort Systems4.8★ (152)11 mi
Welsch Heating & Cooling4.5★ (162)5 mi
WSM Inc. S.I.5.0★ (2)13 mi

How much do HVAC contractors cost in Saint John?

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

How much do HVAC contractors cost in Saint John?
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 Missouri

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 Saint John HVAC contractors

We scored 476 Saint John 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 Saint John 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 Saint John: frequently asked questions

Who is the best HVAC contractor in Saint John?

By CR Score, the highest-ranked HVAC contractor in Saint John, MO is Classic Aire Care with a CR Score of 94/100. It has 4.9★ from 4,820 Google reviews. It is open 24/7. Hoffmann Brothers (#2) and Academy Air Heating, Cooling, Plumbing and Electric (#3) follow. We ranked 476 HVAC contractors on 8 factors, last updated October 22, 2026.

How many HVAC contractors are there in Saint John?

ContractorsRanked ranks 476 HVAC contractors serving Saint John, MO. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.

Which HVAC contractors in Saint John are open 24/7?

160 ranked HVAC contractors in Saint John post 24/7 hours. The highest-ranked are Classic Aire Care (#1), Hoffmann Brothers (#2) and Academy Air Heating, Cooling, Plumbing and Electric (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which HVAC contractors in Saint John work on weekends?

307 of 476 ranked HVAC contractors post Saturday hours and 255 post Sunday hours. The highest-ranked open Saturdays are Classic Aire Care (#1), Hoffmann Brothers (#2) and Academy Air Heating, Cooling, Plumbing and Electric (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does ac replacement cost in Saint John?

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

What Google rating do Saint John HVAC contractors have?

The median Google rating among 476 rated HVAC contractors in Saint John is 4.9★, with a median of 22 reviews. Hoffmann Brothers has the most, 10,949 reviews, and ranks #9. 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 Saint John?

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 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 Saint John

  1. October 2026: CR Scores recalculated for 476 hvac contractors serving Saint John.
  2. October 2026: 3 duplicate listings merged.

More HVAC contractors and Saint John pages

Other trades in Saint John