80 AC Installation Contractors in St. Louis, MO
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Top-Rated AC Installation Contractors in St. Louis
Hoffmann Brothers
“Across 6,117 reviews, a 4.9-star average reflects consistent praise for diagnostic thoroughness and clean work practices. Multiple reviewers explicitly mention…”
Classic Aire Care
“All 8 sampled reviewers awarded 4 or 5 stars, with 3 specifically mentioning same-day or urgent response times. Four reviewers named individual technicians…”
All AC Installation Contractors (80 total)
Scott-Lee Company
“Among 2,238 reviews, nearly every customer awarded 5 stars, with multiple reviewers specifically naming…”
Seliga Heating and Cooling
“Every reviewer on record awards 5 stars to Seliga Heating and Cooling, with 1786 reviews averaging a perfect…”
Dole Heating & Air Conditioning
“Of 1,224 reviews averaging 4.9 stars, customers repeatedly mention same-day response and the owner's personal…”
Design Aire Heating & Cooling - St. Louis
“Of twelve sampled reviews, seven specifically mention same-day or next-day response times during emergencies,…”
Meyer Heating and Air
“100% of reviewers awarded 5 stars, with 4 of 5 sampled customers explicitly mentioning the same-day or…”
One Hour Heating & Air Conditioning® of St. Louis
“849 reviewers have awarded this contractor a 4.9-star average, with every customer who left a detailed review…”
Courtney's Heating & Cooling
“Positive reviews cite diagnostic skill and honesty as recurring strengths, while negative reviews point to…”
Vitt Heating & Cooling
“Five of six readable reviews award 5 stars, with the lone 4-star review citing a positive repair experience…”
St. Louis Heating and Air Conditioning
“All 440 reviews award 5 stars, with customers specifically naming Austin, Kevin, and Mandy as technicians who…”
SmartHouse Heating and Cooling
“481 reviewers deliver an exceptional 4.9-star average, with every single review awarding 5 stars. Multiple…”
JLM Heating and Air Conditioning
“All 165 reviewers awarded 5 stars, with multiple reviewers specifically praising the same-day or next-morning…”
Jersey heating and cooling llc
“All six detailed reviews award 5 stars, with customers specifically praising transparent pricing mentioned in…”
ILLY HVAC
“All 155 reviewers awarded 5 stars, with customers consistently praising co-owners Doug and Jeff by name for…”
ComfortWorks Heating and Cooling
“All eight sampled reviews award five stars, with seven specifically naming a technician (Luke, Matt, or…”
T-Will Fix It
“159 reviewers consistently praise Terrell by name, with calls for punctuality, respect for homes, and…”
Walkers Heating and Cooling Services LLC
“The overwhelming majority of reviews award five stars, with customers consistently praising same-day response…”
Weis Comfort Systems
“5 of 6 reviewers award 5 stars, with two customers specifically praising technician Bill Colin's diagnostic…”
Galmiche & Sons Heating & Cooling
“Reviewers consistently highlight fast response times, with multiple customers noting same-day or next-morning…”
Xcell Williams
“143 reviews averaging 4.8 stars reveal consistent praise for same-day response times and diagnostic…”
Nick Dolinic Heating & Cooling
“174 reviews yield a 4.6-star average, with multiple five-star reviewers specifically naming Nick the owner or…”
Unique Heating and Cooling
“137 reviewers award Unique Heating and Cooling a 4.8-star average, with multiple five-star reviews citing…”
Kirkwood Heating & Air Conditioning
“Across 136 reviews, customers repeatedly mention same-day emergency response, with one Holiday weekend…”
Welsch Heating & Cooling
“Every reviewer who rated the company awarded 5 stars, with multiple customers specifically praising same-day…”
LCM Heating and Cooling
“Every reviewer awarded 5 stars, with Bob named directly in multiple reviews as the technician delivering…”
AL-DON Indoor Air Quality Specialists
“Five of six reviewers award five stars, with technicians Hector and Boyan named specifically for their…”
Breeze Heating and Cooling
“All five-star reviews name specific technicians, Chris, Dave, Patti, or Bob, demonstrating strong…”
AC Installation Costs in St. Louis
New central AC installation costs in St. Louis, by system type and brand.
| Service | Low | Average | High |
|---|---|---|---|
Window unit | $168 | $392 | $784 |
Ductless mini-split (single zone) | $2,240 | $5,040 | $8,960 |
Central AC replacement (existing ducts) | $3,920 | $7,280 | $13,440 |
Central AC new install (with ductwork) | $7,840 | $13,440 | $22,400 |
Carrier (residential) | $4,256 | $6,944 | $11,760 |
Trane (residential) | $5,600 | $9,856 | $15,232 |
Lennox (residential) | $3,920 | $7,280 | $13,440 |
Rheem (residential) | $3,584 | $6,160 | $10,080 |
Prices reflect continental metro averages compiled from published industry cost guides, contractor surveys, and regional labor data. Last updated: April 2026.
AC Installation in St. Louis, MO: What to Expect
St. Louis’s climate pushes cooling systems hard: hot, humid summers with 90°F highs and roughly 40 days over 90°F, paired with cold winters averaging 22°F, create real year-round demand for reliable systems. That demand fuels a busy marketplace—48 contractors serve the metro, averaging a 4.7 rating across 22,754 reviews, and 16 firms advertise 24/7 service for urgent ac-installation St. Louis needs.
Specific top-cost figures weren’t supplied in the dataset, but homeowners should expect prices to vary with unit size and efficiency (SEER), ductwork repairs, and labor or permit needs. Missouri has no statewide HVAC license, so local municipality licensing and permit requirements matter; confirm credentials and local permits before signing. Many contractors offer financing or seasonal promotions, which can affect out-of-pocket timing.
No individual customer highlights were provided, so trends across the St. Louis market are the best guide: reliable responders earn strong reviews, installers who document load calculations and warranty terms stand out, and clear written estimates reduce surprises. Focus your questions on efficiency recommendations, timeline, permit handling, and post‑install support when comparing bids.
Frequently Asked Questions
Other HVAC Services in St. Louis, MO
All HVAC Contractors in St. Louis, MO
Complete directory of 100 contractors — browse alphabetically
A–Z
All HVAC Contractors in St. Louis, MO
Complete directory of 100 contractors — browse alphabetically
A
- A & A Heating & Air Conditioning LLC
- Action Heating & Cooling
- Air Conditioning & Heating St. Louis
- Air Conditioning & Heating St. Louis
- Air Conditioning & Heating St. Louis
- Air Conditioning And Heating in St. Louis
- Air Dynamics STL, LLC
- Air Management Supply
- Air Pro Heating & Cooling
- AL-DON Indoor Air Quality Specialists
- All American Appliance Service,LLC.
- American Heating & Air Conditioning
- Ashley Brothers Heating & Cooling
- Averill Heating & Air Conditioning
C
D
G
H
- Harster Heating & Air Conditioning
- Heating & Air Conditioning in St. Louis
- Heating & Air Conditioning in St. Louis
- Heating & Air Conditioning in St. Louis
- Heating & Cooling Experts in St. Louis
- Heating & Cooling Experts of St. Louis
- Heating and Cooling in St. Louis, MO
- Hoffmann Brothers
- Hoffmann Brothers
- Hvac Spot Coolers
- Hvac4all
S
- Scott-Lee Company
- Seliga Heating and Cooling
- Sewell Inc
- SMART St. Louis
- SmartHouse Heating and Cooling
- St Louis Air Mechanical
- St Louis Boiler Supply Co
- St Louis Heating and Cooling
- St. Louis AC and Heating Inc
- St. Louis Cooling & Heat Services
- St. Louis Heating & Air Conditioning
- St. Louis Heating & Air Conditioning
- St. Louis Heating & Cooling
- St. Louis Heating & Cooling
- St. Louis Heating and Air Conditioning
- St. Louis Heating And Air Conditioning
- St. Louis Heating and Cooling
- St. Louis Heating And Cooling
- Staples Heating & Air Conditioning St. Louis Service
- STL Air Pros HVAC