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34 Years
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Emergency
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Expert HVAC Installation, Repair & Maintenance Services in St. Charles, MO
Leiber HVAC has been serving St. Charles County since 1992, guided by our core principle of treating others as we would like to be treated. Our commitment to adding value through expert service and equipment installation has earned us a loyal customer base over three decades. As a family-owned business rooted in St. Charles, we combine local knowledge with technical expertise to address evolving HVAC needs. Our low-overhead model allows competitive pricing while maintaining industry-leading standards. Owner Karl Leiber and his wife Angie, lifelong St. Charles residents, prioritize transparency and integrity in every customer interaction. We specialize in residential and commercial heating, cooling, and indoor air quality solutions, backed by manufacturer warranties and personalized service agreements.

Our team's technical proficiency ensures efficient diagnostics and repairs, supported by free second opinions and air quality analyses. Customer satisfaction drives our operations, reflected in our 24/7 referral program and community engagement initiatives. With two seasonal maintenance checks annually, our planned service agreements help clients optimize system longevity and energy efficiency. Our reputation for honesty and reliability has been built through consistent delivery of quality service, as evidenced by decades of positive client testimonials.
Services
HVAC Installation Emergency Repairs Preventive Maintenance Indoor Air Quality Planned Service Agreements System Diagnostics Equipment Replacement Air Quality Analysis
Details
  • Year established: 1992
Highlights and features
  • 30+ years of HVAC experience serving St. Charles County
  • Free second opinions and indoor air quality analysis
  • Family-owned business with local community roots
  • Financing options available through FTL Finance
  • 24/7 weekend service calls with transparent pricing
What people say
Great company Professional and honest Cost effective Excellent work Very fair
Services
HVAC Installation
Professional HVAC system installation for residential and commercial properties. We offer Goodman brand equipment with 10-year warranties. Our technicians complete installations efficiently while ensuring optimal system performance and energy efficiency. Services include equipment selection guidance and proper sizing calculations.
Emergency Repairs
Weekend emergency repair services for urgent HVAC issues. Technicians respond promptly to system failures with transparent pricing. Service includes diagnostics, parts replacement, and system restoration to ensure comfort during critical temperature conditions.
Indoor Air Quality
Comprehensive indoor air quality solutions including APCO UV purifiers, Aprilaire filters, and humidity control systems. We test for particulates, formaldehyde, and VOCs. Services help reduce allergens and improve respiratory health through whole-house purification technology.
Planned Service Agreements
Seasonal maintenance contracts with twice-yearly system checks. Includes priority scheduling, service call discounts, and free air quality analysis. Regular maintenance extends equipment lifespan and maintains manufacturer warranty validity through proper system care.
System Diagnostics
Detailed HVAC system diagnostics to identify performance issues. Technicians provide honest assessments and cost estimates before repairs. Services include component testing, efficiency analysis, and recommendations for system upgrades or replacements.
People
Karl Leiber
Owner
Karl Leiber, lifelong St. Charles resident, owns and operates Leiber HVAC with 30+ years of industry experience. He oversees daily operations and technical service delivery while maintaining hands-on customer interaction.
Questions
What HVAC services do you offer?
We provide installation, repair, maintenance, and indoor air quality solutions for residential and commercial HVAC systems.
Do you offer emergency service?
Yes, we provide weekend emergency service calls with transparent pricing for urgent HVAC issues.
Are financing options available?
Yes, we offer financing through FTL Finance for HVAC system replacements and major repairs.
What areas do you service?
We primarily serve St. Charles County, Missouri, with 30+ years of local experience.
Do you provide warranties?
We offer 10-year non-transferable warranties on Goodman brand equipment installations.
How can I schedule service?
Call 636-947-0428 during business hours or request appointments online for regular and emergency service needs.
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