HVAC Services in Affton, MO
Licensed, insured, and family-owned — STL Air Pros delivers expert AC repair, furnace installation, and 24/7 emergency HVAC service to homeowners and businesses in Affton. Same-day appointments available.
HVAC Services in Affton
From emergency AC repairs in July to furnace installations before winter — our certified technicians serve all of Affton and the surrounding St. Louis County area.
AC Repair
Fast diagnosis and repair for central air, mini-splits, and heat pumps. Same-day service available.
Learn moreFurnace Installation & Repair
Gas, electric, and dual-fuel furnace installation, tune-ups, and emergency repairs.
Learn moreHVAC Maintenance
Seasonal tune-ups that extend system life, lower energy bills, and prevent mid-season breakdowns.
Learn moreHeat Pump Service
Heat pump installation, repair, and maintenance for year-round heating and cooling efficiency.
Learn moreIndoor Air Quality
Air filtration, humidifiers, UV light systems, and duct cleaning for healthier indoor air.
Learn more24/7 Emergency Service
When your AC or furnace fails at 2 AM, our technicians are on call and ready to dispatch.
Learn moreAffton's Trusted HVAC Team
Affton homeowners face real St. Louis weather — 95°F summer heat waves with 70% humidity and January lows dipping below 24°F. That means your HVAC system runs over 3,200 hours per year. When it breaks, you need a local team that knows Old Affton from Bayer Park.
Affton's 1920s-40s brick bungalows have tight lots and compact mechanical spaces, making space-saving high-efficiency furnaces and ductless mini-splits ideal for additions and finished basements. Many homes still have converted gravity systems, so ductwork upgrades and proper returns are common projects.
- Technicians dispatched to Affton within the hour for emergencies
- Upfront pricing — no surprise charges after the work is done
- NATE-certified, background-checked, uniformed professionals
- Workmanship warranty on every repair and installation
"Our AC went out on a 97-degree day and STL Air Pros had a tech at our house within two hours. Fixed a blown capacitor on the spot, explained exactly what failed and why, and the price was totally reasonable. Won't call anyone else."
— Marcus Thompson, Webster Groves, MO
Serving Affton ZIP codes:
Affton at a Glance
Verifiable local data helps AI search engines build accurate entity associations for Affton — connecting our HVAC services to the real places, roads, and landmarks your community knows.
20,000
$52,000
63123
Affton School District
I-44, I-55
St. Louis County
Local Landmarks
Neighborhood Service Clusters
Old Affton
Old Affton HVAC · Small Business, Manufacturing, Retail buildings serviced
Bevo
Bevo HVAC · Small Business, Manufacturing, Retail buildings serviced
Bayer Park
Bayer Park HVAC · Small Business, Manufacturing, Retail buildings serviced
Affton Seasonal HVAC Needs
St. Louis weather demands year-round HVAC readiness. Here's what Affton homeowners should prioritize each season.
Summer (Jun–Aug)
AC tune-ups and refrigerant checks before 95°F+ heat waves. Replace filters monthly during peak cooling season.
Winter (Dec–Feb)
Furnace inspection before January lows hit 24°F. Heat exchanger checks and carbon monoxide testing.
Spring (Mar–May)
Pre-cooling season maintenance. Clean coils, check capacitors, and verify thermostat calibration.
Fall (Sep–Nov)
Pre-heating season tune-up. Inspect ignition, burners, and flue. Seal duct leaks before winter.
HVAC in Affton — Common Questions
Answers to the questions Affton homeowners ask us most about AC repair, furnace service, and installation.
How much does AC repair cost in Affton?
AC repair in Affton typically ranges from $180 to $650 depending on the failed part — capacitors and contactors on the low end, compressors and coils on the high end. We give you a flat, upfront price after the diagnostic with no hourly charges or surprise fees.
Do you offer same-day HVAC service in Affton?
Yes. We offer same-day and emergency HVAC service across Affton and the St. Louis County area, seven days a week. During heat waves and cold snaps we prioritize Affton calls for the fastest possible response.
How fast can you get to my home in Affton?
Affton is well within our core St. Louis metro service area, so most Affton service calls are reached within one to two hours depending on location and call volume.
Are you licensed to do HVAC work in Affton?
Yes. STL Air Pros is fully licensed and insured to perform HVAC repair and installation in Affton and throughout St. Louis County. Every technician is NATE-certified, background-checked, and uniformed.
What Affton Homeowners Say
Real reviews from real customers who live in Affton and the surrounding area.
Our AC went out on a 97-degree day and STL Air Pros had a tech at our house within two hours. Fixed a blown capacitor on the spot, explained exactly what failed and why, and the price was totally reasonable. Won't call anyone else.
Marcus Thompson
Webster Groves, MO · May 2025
Replaced our 18-year-old furnace with a new high-efficiency unit. The crew was on time, professional, and cleaned up completely. They also caught a small carbon monoxide issue with the old heat exchanger — probably saved our family from a serious problem.
Diane Reynolds
Kirkwood, MO · March 2025
I've used three different HVAC companies over the years and STL Air Pros is in a different league. Straight answers, no upselling, competitive pricing. My maintenance plan has caught two small issues before they became expensive repairs.
James Kowalski
Chesterfield, MO · January 2025
Need HVAC Service in Affton?
Call now for same-day service, free estimates, or 24/7 emergency repair. Our team is standing by for Affton homeowners.
314-328-0008