65/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 768 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 768 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4 Mulberry St, Foristell, MO 63348
Best HVAC Contractors in Warrenton, MO (2026)
85 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Warrenton: Hoock's Heating & Cooling, CR Score 65/100; 5.0★ from 768 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Schraer Heating & Air Conditioning, posts 24/7 hours; ranked #2 of 85.
- 3
Most-reviewed: Superior Service, 2,219 Google reviews at 5.0★, the most of 85 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
85 Warrenton HVAC contractors are ranked here by CR Score, from ten published factors. 25 are open 24/7, 46 open Saturdays and 39 open Sundays, based on posted hours. The median Google rating is 4.9★ across 85 rated businesses.
Top 10 HVAC contractors in Warrenton at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Hoock's Heating & Cooling | 65 | 5.0★ (768) | O'Fallon, 10 mi away | 24/7 | Overall |
| 2 | Schraer Heating & Air Conditioning | 64 | 4.7★ (390) | Warrenton | 24/7 | Emergencies |
| 3 | Superior Service | 63 | 5.0★ (2,219) | Dardenne Prairie, 19 mi away | Sat · Sun · Evenings | Most reviews |
| 4 | Elite Heating and Cooling | 62 | 5.0★ (476) | Wentzville, 16 mi away | 24/7 | — |
| 5 | Renaud Brothers Heating & Cooling | 62 | 5.0★ (609) | Wentzville, 18 mi away | 24/7 | — |
| 6 | Level 9 Heating Cooling Plumbing | 62 | 4.9★ (1,254) | Washington, 20 mi away | 24/7 | — |
| 7 | AAA Heating & Cooling | 62 | 5.0★ (413) | Wentzville, 16 mi away | 24/7 | — |
| 8 | Stay Cool Climate Control | 62 | 5.0★ (1,068) | O'Fallon, 24 mi away | 24/7 | — |
| 9 | Hosack Plumbing, Heating & Cooling | 61 | 5.0★ (696) | O'Fallon, 24 mi away | 24/7 | — |
| 10 | MCF Mechanical | 61 | 5.0★ (22) | Warrenton | 24/7 | — |
The 85 best HVAC contractors in Warrenton, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Warrenton
64/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.7★ from 390 Google reviews, listed on Google as “HVAC contractor”.
- 4.7★ from 390 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 504 Booneslick Rd, Warrenton, MO 63383
Based in Dardenne Prairie, 19 mi away
63/100CR ScoreRanked #3 because of its Google rating and review volume: 5.0★ from 2,219 Google reviews, the most in Warrenton.
- 5.0★ from 2,219 Google reviews
- Hours
- Mon–Fri 7 AM–8:30 PM · Sat–Sun 8 AM–12 PM
- Address
- 101 Stag Industrial Blvd, Lake St Louis, MO 63367
Based in Wentzville, 16 mi away
62/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 476 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 476 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 108 Hamilton Industrial Ct, Wentzville, MO 63385
Based in Wentzville, 18 mi away
62/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 609 Google reviews, listed on Google as “Air conditioning contractor”.
- 5.0★ from 609 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3037 Hopewell Rd, Wentzville, MO 63385
Based in Washington, 20 mi away
62/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.9★ from 1,254 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,254 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 400 M E Frick Rd, Washington, MO 63090
Based in Wentzville, 16 mi away
62/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 413 Google reviews, listed on Google as “Air conditioning contractor”.
- 5.0★ from 413 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 407 E Pearce Blvd Ste A, Wentzville, MO 63385
Based in O'Fallon, 24 mi away
62/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 1,068 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 1,068 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 407 Sonderen St, O'Fallon, MO 63366
Based in O'Fallon, 24 mi away
61/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 696 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 696 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 110 W Pitman St, O'Fallon, MO 63366
#10 MCF Mechanical
Based in Warrenton
61/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 22 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 22 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1009 Armory Rd Suite 108, Warrenton, MO 63383
#11 Swiss, LLC
Based in O'Fallon, 24 mi away
61/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.9★ from 924 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 924 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 406 E Wabash St, O'Fallon, MO 63366
#12 Air Rescue
Based in Warrenton
60/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 10 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in O'Fallon, 24 mi away
60/100CR ScoreRanked #13 because of its Google rating and trade focus: 5.0★ from 775 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 775 Google reviews
- Hours
- Mon–Sun 8 AM–9 PM
- Address
- 103 Church St #20, O'Fallon, MO 63366
Based in O'Fallon, 24 mi away
59/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.9★ from 340 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 340 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 674 Whispering Willow Dr, O'Fallon, MO 63366
Based in O'Fallon, 21 mi away
59/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.9★ from 1,490 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,490 Google reviews
- Hours
- Mon–Fri 7:30 AM–5 PM · Sat 8 AM–4 PM · Sun closed
- Address
- 1520 Kemmar Ct, O'Fallon, MO 63366
#16 ABLE, LLC
Based in Troy, 15 mi away
59/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 137 Google reviews, listed on Google as “Air conditioning contractor”.
- 5.0★ from 137 Google reviews
- Hours
- Mon–Fri 8 AM–8 PM · Sat–Sun 8 AM–4:30 PM
- Address
- 696 S Lincoln Dr, Troy, MO 63379
Based in Warrenton
58/100CR ScoreRanked #17 because of its Google rating and trade focus: 3.8★ from 10 Google reviews, listed on Google as “HVAC contractor”.
- 3.8★ from 10 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 128 Kuhl Ave, Warrenton, MO 63383
Based in Warrenton
58/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.6★ from 18 Google reviews, listed on Google as “HVAC contractor”.
- 4.6★ from 18 Google reviews
- Hours
- Mon–Sun 6 AM–6:30 PM
- Address
- 25744 Booneslick Farm Rd, Wright City, MO 63390
Based in Warrenton
58/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 4 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 205 State Hwy 47, Warrenton, MO 63383
Based in Warrenton
58/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.7★ from 203 Google reviews, listed on Google as “HVAC contractor”.
- 4.7★ from 203 Google reviews
- Hours
- Mon–Fri 7 AM–4 PM · Sat–Sun closed
- Address
- 123 W 1st St N, Wright City, MO 63390
Based in O'Fallon, 20 mi away
58/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.8★ from 112 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 112 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2813 W Terra Ln, O'Fallon, MO 63366
Based in Wentzville, 17 mi away
57/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ from 31 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 31 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 852 Riske Ln, Wentzville, MO 63385
Based in Troy, 15 mi away
57/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.8★ from 86 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 86 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 401 Market Pl Dr, Troy, MO 63379
Based in Warrenton
56/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Air conditioning contractor”.
- 5.0★ from 3 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat 7 AM–6 PM · Sun 7 AM–5 PM
- Address
- 26437 State Hwy U #4, Warrenton, MO 63383
Based in Warrenton
56/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.3★ from 24 Google reviews, listed on Google as “HVAC contractor”.
- 4.3★ from 24 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat 9 AM–12 PM · Sun closed
- Address
- 703 Aragorn Ln, Wright City, MO 63390
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 85 ranked HVAC contractors here; the rest are on their profiles.
Also serving Warrenton
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.
| Business | Google rating | Distance |
|---|---|---|
| A Precision Air Heating & Cooling | 5.0★ (3) | 23 mi |
| Air Rescue | 5.0★ (1) | 21 mi |
| C & S Heating and Cooling | 4.5★ (2) | 15 mi |
| Chesterfield Service | 1.0★ (1) | 13 mi |
| Complete Maintenance & Repair Service Inc. | 4.0★ (4) | 24 mi |
| Emergency Mechanical Service | 3.7★ (3) | 25 mi |
| Hazelwoods Heating and Air Conditioning | 5.0★ (2) | 25 mi |
| J&J Home Heating and Cooling | 5.0★ (2) | 15 mi |
| Jaxon Heating & Cooling | 5.0★ (2) | 21 mi |
| Menke Heating and Cooling | 24 mi | |
| Merkel Mechanical Services | 23 mi | |
| Michelson's Plumbing & Heating | 4.0★ (5) | In Warrenton |
| Missouri Heating & Cooling | 15 mi | |
| Missouri Heating & Cooling - Troy | 5.0★ (1) | 14 mi |
| Mueller Air & Appliance | In Warrenton | |
| One Cool Hot Chick HVAC & Home Repairs | 16 mi | |
| Refrigeration & Kitchen Solutions Inc | 3.6★ (5) | 22 mi |
| RK Heating & Cooling | 22 mi | |
| SPECIALTY WELDING SERVICES LLC | 5.0★ (14) | In Warrenton |
| Veterans HVAC | 5.0★ (2) | 25 mi |
How much do HVAC contractors cost in Warrenton?
National price ranges in USD, not adjusted for Warrenton. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | $3,887 | $5,978 | $8,073 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
| Furnace replacement | $2,823 | $4,814 | $6,896 | Per system, installed; typical range of customer-reported jobs. US national range | October 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 Warrenton HVAC contractors
We scored 85 Warrenton HVAC contractors on ten 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. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, 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.
| Factor | Weight | Computed from | In Warrenton data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |
HVAC contractors in Warrenton: frequently asked questions
Who is the best HVAC contractor in Warrenton?
By CR Score, the highest-ranked HVAC contractor in Warrenton, MO is Hoock's Heating & Cooling with a CR Score of 65/100. It has 5.0★ from 768 Google reviews. It is open 24/7. Schraer Heating & Air Conditioning (#2) and Superior Service (#3) follow. We ranked 85 HVAC contractors on ten factors, last updated October 22, 2026.
How many HVAC contractors are there in Warrenton?
ContractorsRanked ranks 85 HVAC contractors serving Warrenton, MO. 12 of them are based in Warrenton; 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 Warrenton are open 24/7?
25 ranked HVAC contractors in Warrenton post 24/7 hours. The highest-ranked are Hoock's Heating & Cooling (#1), Schraer Heating & Air Conditioning (#2) and Elite Heating and Cooling (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which HVAC contractors in Warrenton work on weekends?
46 of 85 ranked HVAC contractors post Saturday hours and 39 post Sunday hours. The highest-ranked open Saturdays are Hoock's Heating & Cooling (#1), Schraer Heating & Air Conditioning (#2) and Superior Service (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does ac replacement cost in Warrenton?
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 Warrenton. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Warrenton HVAC contractors have?
The median Google rating among 85 rated HVAC contractors in Warrenton is 4.9★, with a median of 23 reviews. Superior Service has the most, 2,219 reviews, and ranks #3. 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 Warrenton?
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 ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Update log for Warrenton
- October 2026: CR Scores recalculated for 85 hvac contractors serving Warrenton.
More HVAC contractors and Warrenton pages
HVAC contractors near Warrenton
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Other trades in Warrenton
- Roofers in Warrenton351 ranked
- Plumbers in Warrenton52 ranked
- Electricians in Warrenton33 ranked
- General contractors in Warrenton79 ranked
- Painters in Warrenton11 ranked
- Landscapers in Warrenton28 ranked
- Handymen in Warrenton5 ranked
- Kitchen remodelers in Warrenton40 ranked
- Bathroom remodelers in Warrenton41 ranked
- Flooring contractors in Warrenton31 ranked
- Concrete contractors in Warrenton47 ranked
- Fence contractors in Warrenton13 ranked
- Deck builders in Warrenton38 ranked
- Siding contractors in Warrenton164 ranked
- Window installers in Warrenton107 ranked
- Gutter installers in Warrenton25 ranked
- Insulation contractors in Warrenton7 ranked
- Solar installers in Warrenton23 ranked
- Garage door repair companies in Warrenton12 ranked
- Foundation repair companies in Warrenton31 ranked
- Tree services in Warrenton51 ranked
- Masonry contractors in Warrenton11 ranked
- Water damage restoration companies in Warrenton111 ranked
- Home builders in Warrenton152 ranked
- Demolition contractors in Warrenton11 ranked
- All contractors in Warrenton