HVAC Services in O'Fallon, IL
2 HVAC contractors found
Home Heating & Cooling
5.0(609)
24/7 Highly Rated
“Every reviewer awarded 5 stars, with 609 total ratings maintaining a perfect 5.0 average. Multiple customers…”
1450 Frontage Rd, O'Fallon, IL 62269
HVAC Service Costs in O'Fallon, IL
Pricing ranges across all HVAC services offered in O'Fallon.
| Service | Typical Range | Price Points |
|---|---|---|
| AC Repair | $75–$2,800 | — |
| AC Installation | $150–$20,000 | — |
| AC Replacement | $2,100–$16,000 | — |
| HVAC Maintenance | $15–$800 | — |
| HVAC Repair | $75–$3,500 | — |
| HVAC Service | $70–$14,100 | — |
| Emergency HVAC | $150–$3,500 | — |
| Commercial HVAC | $2–$80,000 | — |
Prices reflect humid subtropical metro averages based on HomeAdvisor and Angi published cost data. Last updated: April 2026.
Frequently Asked Questions
Among 2 HVAC contractors serving O'Fallon, the top-rated providers average 5.0★ across 1,217 reviews. The highest-ranked companies on this page are sorted by a combination of rating and review volume, so established contractors with consistent quality appear first. Check reviews, licensing, and response time to pick the right fit for your situation.