Delta Air Systems has been in the business of improving the quality of the environment in homes and businesses since the 1950’s. Our approach has always been to listen first –fully understanding your needs makes it simple to develop practical and cost effective furnace or air conditioning solutions. We service what we sell and sell only what we service.

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Please check out our IAQ pages & If you're looking to improve your home's air quality, call us & speak to one of our indoor air quality specialists. We are here to help! (519) 885-2740

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The Canada Greener Homes Grant through the Government of Canada encourages Canadian homeowners to make energy-efficient changes to their home. If you qualify, you could receive up to $5,600 for the installation of a new heat pump. Learn more on our Greener Homes Grant page.

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Testimonials & Reviews

Serving Waterloo, Kitchener, Guelph, Cambridge & Surrounding area.

Delta Air Systems Ltd.
Based on 357 reviews
Christine T.
19:11 16 Nov 22
Delta was recommended to me by a friend when my heating system quit. After contacting them Jason came out, looked at my system and made some recommendations for a system that was a heat pump and backup gas furnace.Needless to say it was a bit of a scary experience when I saw the initial price but Jason walked me through the process to get a grant to cover a nice part of it. I did have some doubts and I expressed them to Delta. They understood and wanted me to be 100% sure. I did some research and felt comfortable about the choice.The install crew was Julian and Brad and I cannot say enough good things about them. They had to do a two day install (lots of work considering my old furnace was oversized and stuck in a small area) and were here on time each day. They didn't mind me checking things out and asking questions. When they left the first day they asked if they could leave some stuff in the garage which I appreciated, they didn't just assume it would be acceptable. The next day when they finished you would not know I had work done as every shred of packing materials, old duct work, etc was gone. Very professional.I look forward to dealing with Delta for all my maintenance etc for the new system.
Chris B.
15:17 15 Nov 22
We had our furnace break, but fortunately Delta was quick to respond with a quote and package that fit our needs. The installers, Steve & Brad, were professional, polite and cleaned everything up perfectly. They spent the time to walk through the new furnace and thermostat as well. Great job !!
Rosa B.
20:26 11 Nov 22
I called Delta when my mother's furnace stopped working. They sent someone over the same day who was extremely thorough in doing the diagnostics and gave a detail explanation of what the issues were. They offered a couple of solutions and were very honest in their feedback and pricing. In addition, they offered to lend my mother a couple of heaters until the furnace could be repaired. It was a pleasure dealing with everyone at Delta. It has happened that other companies tried to take advantage of my elderly mother. This was definitely NOT something that I was worried about with Delta. I found them to be one of the most pleasant and honest companies I have ever dealt with. I would, with 100% confidence, recommend them to anyone.
22:27 04 Nov 22
Delta air systems
Jill D.
17:35 29 Oct 22
Delta is a professional business right from the initial quote to the completed installation. The installers, Matt and Brad, did an exceptional job installing the furnace and there was no mess to clean up when they were done!
Julie W.
12:39 28 Oct 22
Very knowledgeable and polite.,
Tim C.
22:26 24 Oct 22
Where do I start? Let's begin with Annie and Courtney in the office. Pleasant, polite and completely professional. Excellent people to have as first line of contact. Now, let's move to Zach. He's been doing this for almost 9 years and let me tell you, the man was fantastic. He was polite. He was personable. He was well spojen and he looked you in the eye when he talked to you. Talk about inspiring confidence! He was thorough and explained what needed to be done during the initial visit. When he came back to do the job, you would hardly know he was in the house. I mean, he replaced everything on the furnace and took the time to set things up correctly. We also have this air exchanger that I have never been able to figure out and he's the first person who was able to explain it to me. I have never felt more confident in my home's heating system then I do after the work that Zach did. You've probably heard this before but whatever Delta is paying Zach, it's not enough. This young man is the type of person that any employer would be happy to have representing them to customers.
karim W.
11:31 18 Oct 22
Jason & Andrew and their team were very professional with their recommendations, install. The office staff were very responsive with booking the appointments. Within 3 days the from the time we got the very compatative quote and complete install. The installation team was wonderful , they respected our home and laid down Mats to ensure cleanliness. Definitely a 5++ star service and highly recommended. Thank you.
Jay W.
22:39 04 Oct 22
Everyone at Delta Air Systems, from initial contact through consultation and installation, was extremely professional, talented and friendly. They made sure that all questions were answered, all work was explained, and any issues were resolved before invoicing us. We didn't feel pressured to buy a specific brand/product and didn't feel pressured to lease/rent vs. buy (which we wanted to do). I would highly recommend Delta Air to anyone looking for an ethical, professionally-run business.
James F.
11:05 28 Sep 22
Been using them since we moved here. Always do a good job and are very responsive
Dragica T.
16:16 27 Sep 22
I am extremely happywith the service and professional customer support from Delta Air Systems. Tanya from the sales team was very helpful, friendly and the best sales person I have dealt with over the years. Jason and Andrew worked hard to install the new furnace and cleaned up after they were finished. Tammy from the office was very cheerful to talk to on the phone. She registered the equipment for warranty for me which I really appreciate. Overall from start to finish everything was perfect!
John Q.
15:51 15 Sep 22
After we learned our AC was broken we reached out to Delta Air Systems. Tanya responded very quickly to our call and arrived at our home within a few hours. During a period of very warm temperatures we had our install scheduled and completed within the same week. Julian and Brad installed the unit with minimal interruption to our day. The end result was a beautifully installed AC unit and some nice conversations with our installers. I would recommend Delta Air Systems to anyone looking for a reasonably-priced and high-quality AC installed by nice people.
14:00 04 Sep 22
Our experience with Delta air systems was great. The salesman Jason was very informative but not pushy at all. We purchased an a/c unit and furnace. Our installation team Steve and Skylar were very professional! Kept us informed as they worked. Overall a great experience! We are very happy with our a/c unit and furnace.
Brendan G.
20:16 23 Aug 22
Tyler came by and was able to diagnose and fix my AC within an hour. Was very happy with the level of service provided and how they were able to help me get through the warranty process with the part that failed.Would certainly recommend Delta to anyone looking for an HVAC company.
Michal S.
02:02 11 Aug 22
Probably the best customer experience i have ever had!Had Delta Air systems replace an old water heater, replace my old furnace intakes, repair my furnace humidifier, installed a new Ecobee smart thermostat and some little strange request like installing a custom hatch, cleaning the ac coil and hard wiring a booster fan to the furnace. Special thank you to Tyler and Jordan for taking the time to bring my ideas to fruition, you guys Rock!I really appreciate you guys for pulling everything together in such a short time frame. Huge shout out to Julian and Brad for such a clean, professional installation. I’m extremely pleased with the work, would highly recommend Delta Air Systems. Look forward to doing business with you guys in the near future.Cheers!
Tracey P.
12:32 04 Aug 22
Steve, Skylar and Brad did an excellent job installing and explaining the new equipment to us . We are very pleased with the whole process from the consultation visit to the installation
Myrianthi L.
18:17 02 Aug 22
We called Delta Air Systems when our 20 year old AC system stopped working. Tanya came to give us a quote on AC and furnace replacement. Tanya was very knowledgeable and explained the new systems clearly, highlighting their energy benefits and specifications for our home. From the three quotes we got Delta's was the most detailed and Tanya provided us with the longest visit, most thorough inspection and explanation culminating in a choice of 4 systems for varying budgets and needs. Installers, Liam and Matt were punctual, respectful (wore masks ), and their work was very professional. Liam explained the rudiments of the new thermostat and Tanya followed up with a thorough explanation of it. Tanya showed us all the bells and whistles of the thermostat as well as the basic options we would use. We highly recommend Delta Air Systems for their expertise and customer service.
Kate U.
12:53 26 Jul 22
Delta responded promptly to my message and arranged a technician to visit quickly. The technician was professional and friendly and answered all my questions. He diagnosed the problem and had the replacement part on hand so the unit was up and running in no time. I think Delta cares about customers experience.
Tracy Lee C. W.
14:22 25 Jul 22
Delta Air Systems was more than helpful and professional when I had to replace my furnace in (late Dec 2021) and my AC unit (July of 2022). Each installation was done by knowledgeable and polite technicians. Co-ordinating the installs was stress free. The installations were done on time and I am very happy with the work. I am glad that Delta Air was recommended to me via my daughter's friend! Thank you Delta Air.
Gerald A.
14:19 02 Jul 22
Scott and Brad were the installers. They were very professional. They included me in the process and kept asking if I had any questions or concerns. Everything was clean after the job. Overall we are very satisfied.
Graham B.
12:54 27 Jun 22
Started with a diligent review by Tanya of the house needs and whether ductless would work. Good quote and follow up...., installation on time and very well undertaken by Jason and Andrew. They were careful, hardworking, cleaned up everything, but also very good at just talking back and forth about how things were going , how best to do this part etc. The installation was completed ahead of time and the results are excellent. No hesitation in recommending Delta.
Mike B.
20:08 23 Jun 22
Great team with great customer service approach. Julian and Dakota did a great job on the install.
Pamela H
13:01 15 Jun 22
Our A/C wasn't functioning properly so Delta came out to provide service. The technician was helpful and friendly but unfortunately our 17-year-old air conditioning unit was going to require a $700 repair so we opted to replace the unit instead.Tanya was incredibly helpful laying out our options. Originally we were booked 3 weeks out but we were able to move it up to a few days after confirming the unit. Jason & Andrew did the install and were punctual and considerate (put down mats so the floor wouldn't get dirty, they wore masks when inside the house).
Alex S.
17:44 13 Jun 22
The Delta team just finished installing my new furnace/AC and some new ductwork and I am thoroughly impressed with how clean and precise their work is. All of the lines, cables, ducts, etc. have been run neatly and some of my stuff was even relocated as part of the job (which they didn't have to do!). It was a pleasure dealing with them on all fronts, and our new system has been performing beautifully. I was worried about some of the challenges and complications that come with an older home like mine but they knew what they were doing. Highly recommend!
Star C.
22:34 08 Jun 22
Another 5 star repeat performance last week by Zach at Delta Air Systems. Third year in a row. Thanks again for the professionalism, integrity and great advice.*******Last Year's Review Below*******Zach just serviced the ACs at both our house and our condo. He was excellent. Patiently answered all of my layman's questions and provided a lot of additional valuable information important to our HVAC systems. As I had written in last year's review, Zach was again personable, knowledgeable, competent and very honest. Thanks again Zach and Delta Air Systems!
Brad B.
23:44 07 Jun 22
Very helpful!And know there stuff
gary H.
17:09 27 May 22
Very happy with the service to repair my air conditioner.
Yaqiong Y.
13:15 24 May 22
Very happy with their service. The price is fair and the service is excellent and fast.I
Stephen B.
19:33 09 May 22
Excellent service on install - my furnace closet was a bit of a DIY mess (stuff running all over the place, weird foam sealing, dirty condensation pump) and when Delta installed the AC they cleaned it all up, gave me a new pump for free, and everything now looks high quality and professional.A year later the maker of the AC issued a recall on the drain pan of the unit I bought. Delta retrofitted it as soon as the part arrived, no questions asked and no charge! Turns out Daikin had arranged for another repair company to fix it - didn't realize that. However I'm glad Delta did the retrofit as it was a quality job as usual (and they know they're own installs best I'm sure too.)
Mauricio V.
03:27 03 May 22
For the short period I have been dealing with this company, I am happy for their service. The technicians and office staff are amazing, friendly and helpful.
David A.
14:05 19 Apr 22
We inherited a furnace from the previous home owners - last night it started giving us trouble. Called the Delta Air non-emergency line and they called back first thing this morning, dispatching a technician in less than 20 minutes. The pressure switch was having trouble and since the furnace was still under warranty (we didn't know) Delta replaced it with no parts cost. Overall very impressed with quality of service and responsiveness - glad our furnace got fixed on the last cold day of the winter!
Shannon Y.
12:56 02 Apr 22
The service tech Zachary was very professional, knowledgeable, and friendly! Also when called in, they were able to get me an appointment right away, very pleasant experience!
John G.
11:12 18 Mar 22
The experience we had from the start with sales rep (Jason) to the installer team (Jason and Andrew) was exceptional. Not only did we get an excellent new system of Lennox AC and Furnace other improvements were made to our setup including venting for a poorly installed water heater. Very pleased and highly recommend.
Shahid K.
20:34 11 Mar 22
I had a great experience with Delta Air Systems. They installed a new furnace for me. Jayson, the sales person was very friendly and knowledgeable. The installation crew, Steve and Kyle, showed up first thing in the morning and were incredibly courteous and professional. The installation was great and they left the furnace room and my basement clean.
Darlene J.
19:42 10 Feb 22
Delta was recommended to me years ago and they installed all my current equipment back then. I can happily say they are worth their weight in gold. Needed some servicing this winter and I can confidently say they haven't changed. Still the best after all these years.
Glenna K.
19:45 26 Jan 22
Great service - I was very pleased with everyone involved in the attempted repair of my old furnace(Tyler), sale of new one (Jason) and installation of the new unit (Julian and Ben). All were prompt and very respectful - even bringing a heater to help us keep warm. All in all, a really good experience.
Eric H.
01:57 21 Jan 22
Our furnace stopped working during the coldest time of the year and we reached out to Delta Air Systems for a third opinion on our repair / replacement options. The two previous companies told us a repair was not possible / not economical and strongly pressured us towards a replacement. Meanwhile, Delta was able to identify a minor repair option while also presenting transparent quotes for replacement. We truly felt that Delta was honest, fair, and had our best interests in mind.Our experience with Delta (Kelvin, Zachary and Tanya) was amazing! We strongly recommend them and we will continue to use them in the future!
matthieu C.
14:27 19 Jan 22
I had a great experience with Delta Air, I inquired about a humidifier for my furnace. The sales team reached out to me and provided valuable information. The tech who installed it was super nice and the job is very well done.
Liz H.
17:23 14 Jan 22
Delta Air Systems was awesome to work with! Our furnace and ac were replaced in the summer and it happened to be on a day where the humidex was around 40 degrees. The installer shared that typically they install the furnace first and I guess I seemed a bit dismayed at that given that it's a two-day installation and the ac was going to be installed the second day. He was so great in that he said he would reverse the order of installation and do the ac first so that we wouldn't be without ac for a night. I was so appreciative of this. Talk about customer service! We get Delta to regularly check our furnace and ac to make sure they are running a maximum efficiency. A great company and I recommend their services and products.
Stephanie P.
16:45 11 Jan 22
Delta was amazing and easy to work with!! They were quick and very fair with their pricing! Jason was an absolute joy to work with!! We will definitely be calling again!
Natalia K.
21:57 26 Dec 21
We bought a Daikin ductless a/c and heat pump from Delta and the customer service was second to none. Tanya at Delta listened to our needs without trying to upsell us extra units. Our unit was on back order for a while but Tammy kept us in the loop and booked us an installation date quickly after the unit was available. Liam and Matt were our install team and they did a great job - very professional and pleasant guys, they installed the unit with far less disruption than we thought would happen.Overall, we are extremely happy with our experience with Delta, and would highly recommend them for your a/c and heating needs.
Mario H.
20:20 23 Dec 21
The whole process with Delta was seamless and professional. Jason in sales, Tammy in the office and excellent installation by Scott and his assistant Brady. Great work by all!
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Delta Air Systems Furnace, Air Conditioning, Ductless HVAC repair and services in Kitchener, Waterloo, Cambridge and Guelph. Get comfortable for less!

Delta Air Systems has been in the business of improving the quality of the environment in homes and businesses since the 1950’s. Our approach has always been to listen first –fully understanding your needs makes it simple to develop practical and cost effective furnace or air conditioning solutions. We service what we sell and sell only what we service. That’s why we deal only with the top brand names in the industry – Daikin and Lennox. Heating, Cooling, Air Conditioners, Furnaces, Fireplaces & More. Established HVAC manufacturers with products that are certified, tested and approved and come with the best warranties in the business. Delta Air Systems has passed the Lennox Quality Dealer Standards Program and is a certified Daikin Comfort Pro. It is a commitment to excellence through top quality customer service consistent in all participating independent dealers. If your looking for furnace or air conditioning service, repair or replacement in Kitchener-Waterloo, Guelph or Cambridge areas look no further than Delta Air Systems.

We service what we sell and sell only what we service. That’s why we deal only with the top brand names in the industry. Established manufacturers with products that are certified, tested and approved. Furnace, heat pumps and heating repair, replacement, installation and servicing in Kitchener-Waterloo, Cambridge & Guelph. Call us to discuss GreenOn rebates and incentives programs. You could be eligible to save ALOT!

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