A/C Installation Services
For more than 45 years, Mars Plumbing, Heating, Cooling, Sewer & Septic has helped homeowners and businesses achieve dependable indoor comfort with professional air conditioning installation services. Serving Fayette, Effingham, Montgomery, Bond, Madison, St. Clair, and surrounding counties, our licensed HVAC technicians deliver precise system installations backed by honest guidance and decades of hands-on experience.
As a family-owned and operated company, we provide 24/7 live answering, upfront estimates, and expert workmanship from certified cooling specialists who understand the demands of Southern and Metro East Illinois summers.
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Central Air Conditioning Installation
Installing the right central air system is essential for long-term comfort and efficiency. Our technicians evaluate your home’s size, layout, insulation, and cooling needs to ensure proper system sizing and performance. We handle full system installation, duct connections, refrigerant charging, electrical integration, and final performance testing to deliver consistent, reliable cooling.
Ductwork & Airflow Setup for A/C Installation
Proper airflow is critical to A/C performance. When installing a new system, we inspect existing ductwork for sizing, leaks, and airflow restrictions. If adjustments or upgrades are needed, we ensure ducts are properly configured to support your new air conditioner, helping prevent uneven cooling, excess strain, and efficiency loss.
Condenser & Electrical Installation
Outdoor condenser units and electrical components must be installed correctly for safe, efficient operation. We install condenser pads, secure refrigerant lines, connect electrical disconnects, and verify voltage and grounding. Proper installation helps protect your system from premature wear and ensures reliable performance during peak cooling demand.
Thermostat Installation & System Integration
A new A/C system performs best with the right thermostat. We install and integrate programmable and smart thermostats to ensure accurate temperature control, system compatibility, and efficient operation. Proper thermostat setup helps maximize comfort while reducing unnecessary energy use.
Why Homeowners Choose Mars Plumbing & Heating
- Over 45 years serving Southern & Metro East Illinois
- Licensed and insured A/C installation specialists
- Proper system sizing for comfort and efficiency
- 24/7 live answering for urgent cooling issues
- Upfront pricing with no surprise charges
- Service coverage across Fayette, Effingham, Montgomery, Bond, Madison, St. Clair & surrounding counties
FAQ – A/C Installation
How do I know if I need a new air conditioner instead of a repair?
If your system is aging, requires frequent repairs, or no longer cools efficiently, replacement may provide better reliability and long-term value.
How long does A/C installation take?
Most residential A/C installations are completed in one day, depending on system type, electrical requirements, and ductwork condition.
Will a new A/C system lower my energy bills?
Yes. Properly sized and installed systems operate more efficiently and reduce unnecessary energy usage.
Do you evaluate ductwork and electrical connections during installation?
Yes. Proper airflow and safe electrical connections are essential for performance and longevity.
Is your A/C installation work guaranteed?
Yes. All installations are completed by licensed professionals and backed by quality workmanship standards.
Schedule Your A/C Installation Today
Upgrade your comfort with a professionally installed air conditioning system. Contact Mars Plumbing, Heating, Cooling, Sewer & Septic to schedule A/C installation service across Southern Illinois and the Metro East region. Explore our full cooling services to keep your home comfortable year-round.