Design-Air Heating & Air Conditioning
Share
Nearby engineering companies
1175 N 20th
62521, 62522, 62523, 62526
North 22nd Street
540 E Eldorado St
W Harrison Avenue
S Franklin Street
Harrison
W Harrison Avenue
Design-Air provides courteous, professional, on-time HVAC services that improve the comfort and heal Turn to the Experts at Design-Air.
Design-Air can also provide a geothermal alternative to traditional heating and cooling systems. WaterFurnace® geothermal comfort systems, provide up to 75% lower operating costs, safe, clean, and quiet operation, are environmentally sound, and provide reliable operation. With hundreds of WaterFurnace® systems installed, Design-Air has the knowledge and experience to provide you with an environmentally sound geothermal system for your heating and cooling comfort. When it comes to your family or business, you want dependable air conditioning and heating systems that provide you with value as well as comfort. Whether it’s a new installation or routine service, our trained and highly experienced technicians have the knowledge your comfort depends on.
• Carrier Factory Authorized Dealer
• WaterFurnace GeoPro Master Dealer
• NATE certified technicians
• Member Metro Decatur Home Builders Association
• Member Decatur Chamber of Commerce
• Member GAOI (Geothermal Alliance of Illinois)
11/02/2026
Take a look at your HVAC filter and follow your system and filter manufacturer’s replacement guidance. Not sure which filter is right? Ask our team.
Call 217.429.1105 | https://designairhvac.com/
10/31/2026
Wishing our neighbors a fun Halloween and a cozy evening at home. 🎃
From all of us at Design-Air, enjoy the treats and the fall festivities.
10/28/2026
Strange furnace sounds or uneven heating? Schedule service before the next cold stretch. Design-Air offers furnace repair for homes in Decatur.
Call 217.429.1105 | https://designairhvac.com/
10/26/2026
Choosing a Carrier heating and cooling system isn’t just about the equipment—it’s about making your home more comfortable.
Carrier offers options designed to deliver consistent temperatures, efficient operation, dependable performance, and better control over your indoor comfort. That can mean fewer hot and cold spots, smarter energy use, and a home that simply feels better.
𝐇𝐞𝐚𝐝𝐢𝐧𝐠 𝐢𝐧𝐭𝐨 𝐡𝐞𝐚𝐭𝐢𝐧𝐠 𝐬𝐞𝐚𝐬𝐨𝐧, 𝐭𝐚𝐥𝐤 𝐭𝐨 𝐃𝐞𝐬𝐢𝐠𝐧-𝐀𝐢𝐫 𝐇𝐞𝐚𝐭𝐢𝐧𝐠 & 𝐀𝐢𝐫 𝐂𝐨𝐧𝐝𝐢𝐭𝐢𝐨𝐧𝐢𝐧𝐠 𝐚𝐛𝐨𝐮𝐭 𝐟𝐢𝐧𝐝𝐢𝐧𝐠 𝐭𝐡𝐞 𝐫𝐢𝐠𝐡𝐭 𝐂𝐚𝐫𝐫𝐢𝐞𝐫 𝐬𝐲𝐬𝐭𝐞𝐦 𝐟𝐨𝐫 𝐲𝐨𝐮𝐫 𝐡𝐨𝐦𝐞.
10/23/2026
Meet the people behind Design-Air. We are proud to serve homes and businesses in Decatur with heating and cooling support.
Call 217.429.1105 | https://designairhvac.com/
10/21/2026
As the heating season begins, indoor air can feel drier. Ask Design-Air about humidifier options and the right humidity level for your home.
Call 217.429.1105 | https://designairhvac.com/
10/19/2026
Have a room that never feels quite right? Ductless split systems offer heating and cooling for individual spaces. Ask Design-Air whether a ductless system fits your home.
Call 217.429.1105 | https://designairhvac.com/
10/16/2026
𝐓𝐡𝐚𝐧𝐤 𝐲𝐨𝐮 𝐬𝐨 𝐦𝐮𝐜𝐡, 𝐎𝐰𝐞𝐧!
We appreciate your continued trust in Design-Air and are glad our team could help keep your HVAC system running smoothly. 😊🔧
10/14/2026
HVAC trivia: It stands for heating, ventilation, and air conditioning. Three parts of one big goal: helping your indoor space feel comfortable.
Call 217.429.1105 | https://designairhvac.com/
10/12/2026
Illinois weather likes to keep us guessing. If the first cold morning catches your heating system off guard, call Design-Air for furnace service.
Call 217.429.1105 | https://designairhvac.com/
Click here to claim your Sponsored Listing.
Contact the business
Telephone
Website
Address
Decatur, IL
62521
Opening Hours
| Monday | 7:30am - 4pm |
| Tuesday | 7:30am - 4pm |
| Wednesday | 7:30am - 4pm |
| Thursday | 7:30am - 4pm |
| Friday | 7:30am - 4pm |
Other Heating, ventilating & air conditioning in Decatur
Show All
Alerts
Be the first to know and let us send you an email when Design-Air Heating & Air Conditioning posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.