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50+ Years
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Emergency
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Trusted HVAC Services in Northern Illinois & Southern Wisconsin
Fleming Heating & Air Conditioning has been a trusted name in HVAC services since 1964, serving Northern Illinois and Southern Wisconsin. Our team of NATE-certified technicians delivers expert repairs, installations, and maintenance for heating, cooling, and indoor air quality systems. As a Certified Lennox Premier Dealer, we combine industry-leading equipment with personalized solutions tailored to each customer's needs. We prioritize 24/7 emergency services to address urgent HVAC issues promptly, ensuring comfort year-round. With over 20,000 customers serviced, our commitment to quality is reflected in our two-year labor warranties and affordable maintenance plans. We offer flexible financing options to make high-efficiency systems accessible, backed by manufacturer rebates and utility incentives. Our local expertise extends to specialized services like mini-split systems, boilers, and garage heaters, catering to both residential and commercial clients.

Customer satisfaction drives our transparent pricing and honest recommendations, as evidenced by testimonials praising our timely service and fair costs. Operating from South Beloit and Belvidere offices, we serve communities including Rockford, Janesville, and Milton, ensuring regional accessibility. Our dedication to innovation includes smart thermostat integration and energy-saving solutions, helping clients reduce utility bills while enhancing comfort. Fleming's legacy of trust is built on decades of reliable service, technical proficiency, and a customer-first approach that prioritizes long-term relationships over transactional interactions.
Services
AC Repair Furnace Repair AC Installation Furnace Installation Boiler Services Mini-Split Systems Packaged Systems Thermostat Installation Indoor Air Quality Garage Heaters
Details
  • Year established: 1964
Highlights and features
  • 24/7 emergency HVAC services for urgent needs
  • NATE-certified technicians with industry-leading expertise
  • Certified Lennox Premier Dealer for quality equipment
  • Flexible financing options for affordable upgrades
  • Over 20,000 satisfied customers in the region
Associations and certifications
  • NATE-Certified Technicians
  • Lennox Premier Dealer
What people say
Same-day service Fair honest pricing Professional technicians Quick problem resolution Reasonable costs
Services
AC Repair
Our AC repair services address cooling system malfunctions promptly, ensuring optimal performance during peak summer months. Technicians diagnose issues like refrigerant leaks, compressor failures, and thermostat problems using advanced tools. Customers benefit from same-day service appointments and transparent pricing, with repairs prioritizing energy efficiency and system longevity. This service extends equipment lifespan and reduces utility costs through precision diagnostics and quality parts.
Furnace Installation
We specialize in furnace installations for residential and commercial properties, offering high-efficiency models with up to 95% AFUE ratings. Our team evaluates building size, insulation, and climate needs to recommend ideal systems. ENERGY STAR-certified options qualify for tax credits and utility rebates, lowering total ownership costs. Installations include smart thermostat integration and comprehensive warranties, ensuring reliable winter comfort and measurable energy savings for property owners.
Indoor Air Quality
Our indoor air quality solutions combat allergens, pollutants, and humidity imbalances through advanced filtration and ventilation systems. Services include HEPA air purifiers, UV germicidal lights, and whole-home humidifiers/dehumidifiers. These systems reduce respiratory irritants by 99.9% and prevent mold growth through controlled moisture levels. Commercial clients benefit from improved workplace air quality compliance, while homeowners enjoy healthier living environments with reduced allergy symptoms and structural damage risks.
Mini-Split Systems
Mini-split installations provide zoned temperature control for spaces without existing ductwork, such as additions and garages. Our ENERGY STAR-certified models offer 30% energy savings over window units while enhancing home security through sealed installations. Systems support multiple indoor heads per outdoor unit, allowing customized comfort in different rooms. This service includes smart thermostat compatibility and qualifies for federal tax incentives, making it cost-effective for targeted climate control.
Boiler Services
We provide boiler installations, repairs, and maintenance for residential and light commercial applications. Our high-efficiency models feature 95% AFUE ratings with cast-iron heat exchangers for durability. Services include system flushing, pressure testing, and smart thermostat integration. Customers benefit from zone control capabilities and reduced allergy risks through ductless operation. Annual maintenance plans extend equipment life while ensuring optimal efficiency and safety compliance for both gas and oil-fired boiler systems.
Questions
Do you offer 24/7 emergency HVAC services?
Yes, we provide 24/7 emergency HVAC services for urgent heating and cooling issues.
Are financing options available for HVAC installations?
Yes, qualified buyers can finance new Lennox systems with 0% interest for 12 months.
What areas do you service?
We serve Northern Illinois and Southern Wisconsin, including Rockford, Belvidere, and Janesville.
Do you provide warranties on HVAC installations?
Yes, we offer a 2-year labor warranty with furnace and air conditioning purchases.
Are your technicians certified?
All technicians are NATE-certified for professional HVAC service and repairs.
Can I purchase HVAC parts online?
Yes, visit our online store to buy air filters and HVAC units directly.