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Design-Air Heating & Air Conditioning—A man sneezing with allergens floating around him during allergy season in Decatur, IL.

Allergy Season in Illinois: How Your HVAC Can Help

Spring and summer in Illinois bring blooming flowers, lush greenery, and, unfortunately for many, allergy season. Pollen, mold, dust, and other allergens can wreak havoc

April 15, 2025

A Design-Air Heating & Air Conditioning HVAC technician checks a residential outdoor unit during the spring thaw in Decatur, IL.

Preparing Your HVAC System for Illinois’ Spring Thaw

As Illinois transitions from the cold grip of winter to the milder days of spring, your HVAC system plays a critical role in maintaining comfort

March 15, 2025

A frozen HVAC unit outside a home in Decatur, IL. Design-Air Heating & Air Conditioning can help prevent ice damage.

Preventing Ice Damage to Your Outdoor HVAC Unit

Illinois winters are notorious for their extreme cold, heavy snowfall, and icy conditions. While your HVAC system works tirelessly to keep your home comfortable during

February 15, 2025

A residential home in the middle of winter in Decatur, IL. To keep their homes safe, Illinois homeowners should contact Design-Air Heating & Air Conditioning.

How to Maximize Furnace Efficiency During Illinois’ Deep Freeze

When Illinois’ winter arrives in full force, homeowners rely on their furnaces to keep their homes warm and comfortable. However, heating your home during sub-zero

January 15, 2025

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Why Our Clients Choose Design-Air Heating & Air Conditioning

A Technician showed up first thing in the morning after I called about my central air unit not working. The Tech troubleshot my situation and got my unit back in business. The customer service was second to none. The Tech was very knowledgeable and had no problem answering the many questions I had.

Emile Joyner

Design Air was great! Two winters ago my furnace went out. They were out within 2 hours of calling - after hours - and were back early the next day and had it done by early afternoon. Very efficient and caring

Lorri Bauler

I've had the Geothermal system Design-Air put in about a year ago. It's been efficient and quiet. They came quickly to install it and even tied it into my hot water heater. I've been super happy with the professionalism and response by everyone there. I highly recommend them and will continue to let friends and family know about their service.

Kathy Park

Called design air when AC unit wasn’t working at 6:00 pm (after hours). The owner called back about 40 minutes later and came to our house to fix the issue by 9:30pm. Great, professional service. Highly Recommend!

Chelsea Sult

A Technician showed up first thing in the morning after I called about my central air unit not working. The Tech troubleshot my situation and got my unit back in business. The customer service was second to none. The Tech was very knowledgeable and had no problem answering the many questions I had.

Emile Joyner

Design Air was great! Two winters ago my furnace went out. They were out within 2 hours of calling - after hours - and were back early the next day and had it done by early afternoon. Very efficient and caring

Lorri Bauler

I've had the Geothermal system Design-Air put in about a year ago. It's been efficient and quiet. They came quickly to install it and even tied it into my hot water heater. I've been super happy with the professionalism and response by everyone there. I highly recommend them and will continue to let friends and family know about their service.

Kathy Park

Called design air when AC unit wasn’t working at 6:00 pm (after hours). The owner called back about 40 minutes later and came to our house to fix the issue by 9:30pm. Great, professional service. Highly Recommend!

Chelsea Sult

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