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50+ Years
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Emergency
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Trusted HVAC Installation, Repair & Maintenance Services in Effingham, IL
Established in 1935, Merz Heating & Air Conditioning has served Effingham, Illinois, and surrounding areas for over 85 years. Our team specializes in residential and commercial HVAC solutions, including installation, repair, and maintenance of furnaces, air conditioners, heat pumps, geothermal systems, and indoor air quality products. As a premier Lennox dealer, we combine industry-leading equipment with personalized service to meet each client's unique needs. Our commitment to quality extends to sheet metal fabrication, architectural sheet metal work, and energy-efficient design/build projects for healthcare, education, and industrial clients. With 24/7 emergency service and a focus on customer education, we prioritize long-term relationships over transactional interactions.

Our technicians undergo continuous training to maintain expertise in evolving HVAC technologies while preserving traditional values of integrity and workmanship. We measure success through repeat business and referrals, evidenced by decades of testimonials praising our promptness, professionalism, and attention to detail. From routine maintenance plans to complex commercial installations, our approach remains consistent: deliver solutions that enhance comfort, improve efficiency, and exceed expectations while maintaining transparent communication throughout every project.
Services
HVAC Installation Emergency Repairs Preventive Maintenance Indoor Air Quality Energy Efficiency
Details
  • Year established: 1935
Highlights and features
  • We offer over 85 years of combined HVAC experience in residential and commercial systems
  • Our team provides 24/7 emergency service with live operator support
  • Certified technicians trained on all major HVAC brands including Lennox
  • We guarantee prompt service with testimonials confirming same-day solutions
  • Energy savings calculator helps customers make informed efficiency decisions
What people say
Fast and friendly service Courteous and efficient Prompt service Professionalism of your guys Excellent job
Services
HVAC Installation
We install complete heating, ventilation, and air conditioning systems for residential and commercial properties. Our technicians handle furnaces, air conditioners, heat pumps, geothermal systems, and ductless mini-splits. Using premium Lennox equipment, we ensure proper sizing and configuration for optimal efficiency. Our installation process includes system testing, customer education, and cleanup to maintain property standards.
Emergency Repairs
Our emergency repair service operates 24 hours daily with live operator support. Technicians respond promptly to HVAC failures, prioritizing critical issues like complete system breakdowns. We maintain inventory of common replacement parts to minimize return visits. Service includes diagnostics, repairs, and post-service testing to restore functionality quickly and safely.
Preventive Maintenance
Scheduled maintenance plans help extend equipment lifespan and prevent unexpected failures. Our technicians perform comprehensive inspections, cleaning, and adjustments on all system components. This includes checking electrical connections, lubricating moving parts, and verifying refrigerant levels. Regular maintenance improves efficiency and maintains manufacturer warranty requirements.
Indoor Air Quality
We offer air purification, humidity control, and ventilation systems to improve indoor environments. Our solutions address allergens, mold, and pollutants in residential and commercial spaces. Products integrate with existing HVAC systems to maintain healthy air without compromising efficiency. We recommend customized solutions based on property-specific air quality challenges.
Energy Efficiency
Our energy savings solutions help reduce utility costs through system upgrades and optimization. We provide high-efficiency equipment recommendations and usage analysis using our online calculator. Commercial clients receive design/build services for energy-efficient HVAC systems. We help customers understand rebates and incentives for qualifying efficiency improvements.
People
Pat Gebben
Owner / Sales
Third-generation HVAC professional with over 30 years industry experience. Specializes in residential system consultations and energy-efficient solutions. Active in local business community and customer satisfaction advocate.
Dustin Gebben
Residential Sales
Residential sales expert with 15 years HVAC experience. Focuses on personalized comfort solutions and new construction projects. Maintains Lennox product certification and customer education initiatives.
Dylan Bartels
Commercial Sales
Commercial HVAC specialist with expertise in design/build projects. Manages large-scale installations for healthcare and industrial clients. Coordinates with architects and engineers to meet project specifications and timelines.
Deb Levingston
Service Dispatcher
Experienced service coordinator handling emergency and scheduled maintenance requests. Ensures timely technician dispatch and customer communication. Maintains 24/7 service coverage and client satisfaction focus.
Daryl Smith
Service Technician
Certified HVAC technician with 20 years field experience. Specializes in complex repairs and system diagnostics. Recognized in customer testimonials for professionalism and technical expertise during service calls.
Questions
What HVAC services do you offer?
We provide installation, repair, and maintenance for residential and commercial heating, cooling, and air quality systems including 24/7 emergency service.
Do you offer emergency HVAC service?
Yes, our 24/7 emergency service includes live operator support at (800) 252-4328 for urgent heating and cooling system repairs.
What areas do you serve?
We serve Effingham, IL and surrounding areas within a 100-mile radius including Charleston, Robinson, and Vandalia for residential and commercial clients.
Are financing options available?
We offer financing options for qualifying HVAC installations. Contact our sales team for details on current promotions and payment plans.
Do you provide maintenance plans?
Yes, our preventive maintenance plans include seasonal system tune-ups to improve efficiency, extend equipment life, and maintain warranty coverage.
What makes your company different?
With 85+ years experience, 24/7 service, Lennox expertise, and customer testimonials praising our promptness and professionalism, we combine tradition with modern solutions.