Top 5 O'Fallon providers scored across five ranking dimensions.
| Provider | Response Time | Pricing Transparency | Licensing | Service Breadth | Overall |
|---|---|---|---|---|---|
| One Hour Air Conditioning & Heating✓ | ★★★☆☆ | ★★★★☆ | ★★★★★ | ★★★★☆ | ★★★☆☆ |
| Aire Serv Heating & Air✓ | ★★★★☆ | ★★★☆☆ | ★★★★★ | ★★★★☆ | ★★★★★ |
| Service Experts HVAC✓ | ★★★★★ | ★★★☆☆ | ★★★★★ | ★★★★☆ | ★★★★☆ |
| American Air Conditioning | ★★★★★ | ★★★☆☆ | ★★★★★ | ★★★★☆ | ★★★★★ |
| Four Seasons Heating & Air | ★★★★★ | ★★★★☆ | ★★★★★ | ★★★★☆ | ★★★☆☆ |