Design Air Cond., A Climatecare MemberHVAC Services in THORNHILL
Design Air Cond., A Climatecare Member specializes in Carrier HVAC installation, repair, and maintenance. Proudly serving THORNHILL and the surrounding areas, we deliver reliable HVAC solutions to meet your home's needs.
HVAC Repair and Installation Services

Air Conditioner Repair & Service
We specialize in fast, reliable air conditioner repair and service to keep your home cool and comfortable. Whether it’s a minor fix or a major repair, we're here to ensure your AC runs smoothly when you need it most.
Furnace Repair & Service
We provide expert furnace repair and service. Our skilled technicians are ready to quickly diagnose and resolve any issues, keeping your home warm and comfortable year-round.
HVAC System Installation
We provide expert HVAC installation to keep your home comfortable year-round. Whether you're replacing your current system or installing HVAC for the first time, we'll help you choose the right solution for your needs and handle the installation with precision and care.
HVAC Maintenance
We offer annual HVAC maintenance to keep your system running efficiently and help prevent unexpected breakdowns. Through a thorough inspection and tune-up, we ensure your heating and cooling system is ready to keep you comfortable all year long.
About Design Air Cond., A Climatecare Member

Trusted HVAC Professional in THORNHILL
Leave a ReviewCarrier.com Reviews
4.91 out of 5(32 reviews)
Expert, On Time, Friendly
I have purchased a fireplace, air conditioner and now a new furnace from Design Air. I have found them to be extremely competent, unfailingly dependable and very customer oriented. The quality of the furnace instal in particular was outstanding. They constructed a small bracket for my condensation pump and made a small repair to my ducting because they saw I needed it...and did not charge me. Outstanding!
Don
-
November 05, 2025
Verified Purchase
Expertise:
5
Solve Problems:
5
Service:
5
Great at Providing the Pros & Cons of Available Options
Wasn't pushy but provided thoughtful and realistic insights about the expected lifespan of existing equipment and how long replacement parts and/or components were likely to last. Also provided useful information about the economics of available options.
ROB
-
March 22, 2025
Verified Purchase
Expertise:
5
Solve Problems:
5
Service:
5
Replacement AC
Best Mechanical company GTA.
STEVE
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March 11, 2025
Verified Purchase
Expertise:
5
Solve Problems:
5
Service:
5
Professional & Excellent Service
I recently had the pleasure of hiring Design Air ClimateCare to install a new high\-efficiency furnace system in my home, and I am delighted with the outstanding service they provided. From start to finish, the experience with them was seamless, professional, and exceeded my expectations. The installation team arrived on schedule and worked efficiently to complete the project within the estimated timeframe. I was impressed by their attention to detail and precision in every aspect of the installation. The technicians were not only skilled but also courteous, ensuring minimal disruption to my daily routine. They took the time to answer any questions I had and provided valuable insights into the maintenance and care of the new HVAC system. I highly recommend Design Air ClimateCare for anyone in need of HVAC installation services. Their professionalism, expertise, and customer\-focused approach set them apart in the industry. I am grateful for the exceptional service I received and confident that others will have a similarly positive experience with this reputable HVAC installer.
Mike
-
December 04, 2023
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
4
Infinity® 98 Gas Furnace With Greenspeed® Intelligence 59MN7
Great instil.
NICK
-
October 16, 2023
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Positive experience
Service was friendly and efficient. The techs showed up on time
LIANNE
-
January 24, 2023
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
The excellent installation of my Carrier furnace
The installation was timely as cold weather was arriving. The installers were excellent in every respect. The removal of the old furnace and new installation were completed in one day including a thorough clean up. We were completely satisfied!
BRIAN
-
December 06, 2022
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
New Furnace - Khanna residence, Richmond Hill, ON
Good service and Install.
CHAND
-
March 08, 2022
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
4
NEW AC
We have used Design Air for many years because of their great service.
Nancy
-
August 22, 2021
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Air conditioner replacement service
Thank you
RON
-
June 09, 2021
Verified Purchase
Expertise:
4
Solve Problems:
4
I have dealt with Design Air for many, many years. They recommend quality products and provide exceptional service every time that has been required.
My furnace was not working and when I called for service they arrived on the same day. There service personnel are always professional and provide accurate information with which I make my decions.
Debra
-
January 11, 2021
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Friendly, thorough and professional
Answered questions and gave great advice.
Lisa
-
August 21, 2020
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Long time good service!
I have been dealing with them for over 30 years! Other than one incident with a rude receptionist (who has since left their employ!), I have received excellent service with Design Air.
Millie
-
July 14, 2020
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Prompt, professional, and pleasant
Prompt initial service call on our 20\-year\-old A/C. Professional and patient sales call, where we asked a lot of questions. Installation about a week later. We are very satisfied.
Martin
-
July 14, 2020
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Design Air, a very good team
We called Design Air in to diagnose why the air conditioning wasn't cooling our house and learned that our furnace had reached the end of its life. The technician was able to recommend a suitable replacement at a reasonable cost and returned in a few days to do a fantastic job with the installation.
Peter
-
October 12, 2019
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
We have dealt with Design Air for decades and have never encountered any issues that were not supported and we have never felt the need to go anywhere else.
Our calls for either installation of new products and/or service have always been met with quick, polite and fully completed results.
Laurence
-
October 09, 2019
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Central Air Replacement
When I called Design Air to book repairs because our 23 year\-old household Central Air System was not operating, they responded immediately with a technician visit. When he found that the system was not repairable, he arrange for a call from a sales rep. Arrangements were quickly made for a new system, and installation was made a few days later. We were impressed with the speed and efficiency of the process.
Bob
-
August 12, 2019
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
very good experience
installers Alex and John did a very good job with installation . they were extremely professional!
Jill
-
June 13, 2019
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
EXCELLENT CONTRACTOR. FANTASTIC INSTALLATION. EXCEEDED MY EXPECTATIONS
Design Air Climatecare is an excellent heating and air conditioning contractor. Great service. The installation exceeded my expectations.
Enrico
-
May 14, 2019
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
always great
excellent company, they always solve any problem, highly recommended
Howard
-
May 13, 2019
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Super Service & Professionalism
Left the place cleaner than when they found it. went extra mile, re\-did all humidifier drain pipes and system (integrated to A/C drains) even though no humidifier was purchased. smooth.
Art
-
May 02, 2019
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Great service, knowledgable staff and willing to go the extra mile!
We received excellent service from Design Air and are very pleased with the result. The furnace installation in our apartment was challenging and complex, but Design Air was willing to put in the extra effort and knowledgeable to handle this difficult job. It's been great dealing with them and we can highly recommend them.
Donald
-
September 11, 2018
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Very happy with Design Air. Have been doing work for me for many years.
Design Air is very professional in all aspects of Sales, Office and on\-site work.
John
-
August 13, 2018
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Great work
John and Greg were great and got us up and running as soon as possible.
George
-
July 26, 2018
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
20 years and 3 houses!
I've been using Design Air for all my heating and cooling over three houses and 20 years. Excellent service always. Greg is fantastic. John is as well.
David
-
July 23, 2018
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
WENT WITH THE CARRIER AND MY OTHER CHOICE WAS THE LENNOX
MY MAIN FURNACE QUIT ON ME A FEW DAYS BEFORE X\-MAS AND NEEDED TO GET ONE UP AND RUNNING ASAP. THE QUOTE TO FIX MY EXISTING AMANA 100K BTU WAS $2600 FOR PARTS ONLY SO ACTUAL BILL WOULD HAVE EASILY EXCEEDED $3400. IT WAS 14YEARS OLD...SHOULD HAVE HAD THE MAINTENANCE PACKAGE $30/MONTH.....WOULD HAVE BEEN WELL WORTH IT...LIVE AND LEARN. FURNACE DIED ON FRIDAY, I HAD A REALLY GOOD SERVICE COMPANY(MERCI) CAME IN AND ESTIMATE THE DAMAGE(REPAIR AMOUNT). AFTERWARDS LEFT A BUNCH OF MESSAGES TO DIFFERENT FURNACE INSTALLER COMPANIES, THESE GUYS CALLED ME BACK MONDAY AND HAD IT INSTALLED UP AND RUNNING BY WEDNESDAY, THE COST WAS NEAR THE TOP END AT 6 LARGE. THE MERCI GUYS CALLED ME TUESDAY A DAY LATER BUT I WOULD HAVE GONE WITH THEM ALSO IF THEY WOULD HAVE BEEN A DAY EARLIER. DO READ THE REVIEWS SO YOU DON'T GET STUCK WITH GARBAGE SERVICE. THESE TWO COMPANIES ARE TOP SHELF, HIGH PERFORMANCE AND MOST IMPORTANT DONE RIGHT THE FIRST TIME.. CHEERS
Anthony
-
January 29, 2018
Verified Purchase
Expertise:
4
Service:
5
Solve Problems:
5
new furnace & air-conditioner
Good service. Nice workmen.
Don
-
November 22, 2017
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Installation of Carrier 59TN6A060
Replacement of old Carrier furnace with Infinity 59TN6. They were knowledgeable, efficient and pleasant to deal with.
Linda
-
September 18, 2017
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Home AC
System was installed quickly and with a minimum of mess. The installing team was very professional and answered my questions without hesitation. System operates quietly and provides excellent cooling.
Tino
-
August 01, 2017
Verified Purchase
Expertise:
4
Service:
5
Solve Problems:
4
New Furnace and A/C unit
Carrier Performance Series Furnace
Ron
-
April 22, 2017
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Amazing ductless heating and cooling unit! Love it!
Great company to work with. Excellent customer service.
Robert
-
September 13, 2016
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
Design Air Installers of ductless wall mount air conditioner
Efficient installation by knowledgable skilled employees of Design Air, Thornhill, Ontario. Very prompt response to replace our unit which had stopped working.
Gino
-
September 12, 2016
Verified Purchase
Expertise:
5
Service:
5
Solve Problems:
5
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