We're Not


Until You Are

The weather is always comfortable inside your home, thanks to Design-Air Heating and Air Conditioning.

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Licensed Heating & Air Conditioning Technicians
Warrensburg Illinois

Design-Air Heating & Air Conditioning has been the go-to HVAC company in Warrensburg, IL and the surrounding regions since 1977. We provide services ranging from air conditioner maintenance and repair to furnace replacement and heating diagnostics. Because all our experienced technicians are NATE-certified, we are well-versed in all forms of HVAC maintenance for name-brand makes and models. Nothing is too difficult for our HVAC specialists to handle, whether your air conditioner’s filter needs to be replaced or your home’s air quality needs to be checked.

We care about the safety and comfort of your home as a family-owned and run company. For an estimate from a Design-Air Heating & Air Conditioning technician, please contact our shop.

Air Conditioning Services
Warrensburg Illinois

When your air conditioner stops functioning or begins pumping warm air into your house, Design-Air Heating & Air Conditioning is here to help. We provide skilled AC repair, maintenance, and installation services to help you get your home back in working order. Various of our experts are NATE-certified and have decades of expertise working on all brands of air conditioners. Whether you need seasonal maintenance or your present air conditioning unit cannot be fixed, our experts will try to find you the most cost-effective solution to restore the cooling requirements of your Warrensburg, IL home.

Call 217.429.1105 for a  quote on all of our AC replacement services and to arrange an emergency service.

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Furnace Services
Warrensburg Illinois

When winter approaches in Warrensburg, IL, it’s critical to have a functional furnace that can keep your house warm throughout the season. If your pilot light has gone out or your furnace is spewing cool air, it’s time to contact Design-Air Heating & Air Conditioning. Our family-run company specializes in home furnace repair, maintenance, and installation for all major brand names. One of our NATE-certified experts will begin with a comprehensive diagnostic to determine the reason for your furnace failure and then deliver dependable repairs to get your house back up and running.

Don’t put off contacting our professional staff for a furnace repair or replacement service until your house begins to freeze.

Indoor Air Treatment
Warrensburg Illinois

It’s no secret that modern properties are being built more securely than ever. This means that indoor air filtration is becoming harder to regulate as the seasons change. Design-Air Heating & Air Conditioning has over 45 years of business expertise and has seen how much our interior air quality affects our way of life. Clogged air filters, dirty air ducts, and pet dander stacking up in the corners of your living areas may cause headaches, dry eyes, sore throat, and even major respiratory disorders. Fortunately, our NATE-certified specialists in Warrensburg, IL provide a variety of indoor air treatment alternatives for residential and business facilities.

Engaging in any air treatment services may eliminate hazardous allergens while generating clean, breathable airways.

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Quality Service for the Comfort of Your Home

Whether you need services for your air conditioning, heating, air-quality, or other HVAC services, Design-Air Heating & Air Conditioning is here to support you and take on any job.

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Geothermal Heating
Warrensburg Illinois

For over four decades, Design Air has spearheaded geothermal installations, proudly serving Warrensburg, Illinois, and beyond. With a track record of over 2000 successful installations, we stand as the go-to experts for efficient and eco-friendly heating and cooling solutions.

Our geothermal systems tap into the earth’s stored solar heat, delivering cozy warmth in winter and refreshing cooling in summer. Using specialized High-Density Polyethylene (HDPE) pipes, these systems efficiently transfer heat energy, tailored to your specific space and ground composition for optimal performance. Additionally, take advantage of the extended 30% federal tax credit available until December 31, 2032, for residential ground source heat pump installations, making geothermal an even more appealing investment.

Connect with Design Air today for a complimentary Energy Analysis. Discover the potential energy savings and financial benefits of a custom-designed geothermal system.

Commercial HVAC
Warrensburg Illinois

If you run a business in Warrensburg, IL, you must keep your heating and cooling systems in good working order all year. To deliver high-quality services for your business systems, Design-Air Heating & Air Conditioning has over 45 years of HVAC repair, installation, and maintenance expertise. Whether your air conditioner is spewing warm air or your furnace won’t turn on, you need a team of specialists to do quality repairs so your company can continue operating. Our NATE-certified experts service all commercial air conditioner and furnace brands and models, ensuring that your company is never jeopardized.

Call us at 217.429.1105 for a quote on our system replacement services or to arrange an emergency repair.

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Ductless Split System
Warrensburg Illinois

Design-Air Heating & Air Conditioning specializes in ductless split unit maintenance, repair, and installation for homes and businesses in Warrensburg, IL. Ductless systems bring comfort to any space, from homes and schools to business buildings and hotels. Our units come in a variety of shapes and sizes, and they may be installed indoors or outdoors, making them suitable to your specific needs. Our HVAC specialists have over 45 years of industry experience and can promptly detect the problem with your unit and make cost-effective repairs. Make an appointment with our professionals as soon as you’re ready to invest in a ductless system or if you detect a problem with your current ductless unit. We’re here to assist you every step of the way. We give free estimates and employ completely certified and educated technicians on our team to supply our customers with the highest quality results.

Our products are energy-efficient, cost-effective, and simple to install, and our technicians will be ready to help you from the day of installation to any maintenance needed throughout the life of your unit. We will be there to support you every step of the way.

New Construction Installation
Warrensburg Illinois

Design-Air Heating & Air Conditioning is an excellent choice when you want a company that offers remarkable results for your new construction installation project. Your satisfaction is always assured when you work with our experts, whether you’re creating a new home or a business in Warrensburg, IL. Allow us to create a space that is both attractive and functional. You’ll need a building that is comfortable for everyone, so talk to our heating and air conditioning specialists that have years of experience. If you put your faith in us, you will reap the rewards of working with the best in the industry. Allow us to walk you through our process and consult with you on the vision for your next project. If we work together, we can make each of your goals a reality. Once the high-quality HVAC equipment has been installed to fit your space and work properly, our trained technicians will keep it in top condition by offering ongoing maintenance services whenever professional exams or repairs are required.

We can provide whatever services you require to make your building efficient, safe, comfortable, and welcoming to your guests.

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Why Choose Design-Air Heating & Air Conditioning?

Design-Air Heating & Air Conditioning has been the leading HVAC expert for over four decades. Since then, we have provided long-lasting repair, replacement, and maintenance services to homes and businesses throughout Warrensburg, IL. Here are just a few reasons our customers continue to choose us for their air conditioning & furnace services.

  • Free Estimates on Replacements

  • In Business For 45+ Years

  • Carrier Authorized Dealer

  • Emergency HVAC Services

  • Family Owned & Operated Business

  • NATE Certified Technicians

  • In Business For 45+ Years

  • Free Estimates on Replacements

  • NATE Certified Technicians

  • Carrier Authorized Dealer

  • Emergency HVAC Services

  • Family Owned & Operated Business


Why Our Clients Choose Design-Air Heating & Air Conditioning

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Schedule Appointment

Monday thru Friday 7:30A – 4:00P To schedule non-emergency service or standard maintenance, please call 217.429.1105 or complete the form below:
Contact Information
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