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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Testimonials & Reviews

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

Delta Air Systems Ltd.
Based on 267 reviews
Linden G.
19:44 17 Feb 21
Friendly, on time, on complaints on the install.
Eric R.
14:36 17 Feb 21
I wish I could give more than 5 stars. Everyone involved in the install of a new Furnace and A/C for me was above and beyond. Tanya in Sales, Tammy in scheduling and Julian and Brandon who did the install were all top notch. I had an install scheduled and my original furnace broke down, they were able to do an emergency repair for me ahead of my install date which was a lifesaver and now that the new equipment is in its perfect. They are the only company I’ll call for any future heating and cooling needs. A++++
Warren C.
21:25 16 Feb 21
Delta Air Systems Ltd. recently completed another HVAC project at our home. We selected this firm because they had successfully three previous challenging HVAC projects at our residence. Delta had earned our confidence with their previous work and we were not disappointed with our decision to grant them more business this time. The work was accurately specified, fairly priced and the execution of the job was first-class. The installation crew (Vince and Dakota) was highly experienced and capable, worked very efficiently and cleanly and left the job site in perfect condition. They took the time to fully explain proper operation and care for the equipment. Our sales representative also came by the job site to ensure the project got off to a great start. All in all, we are very pleased with the outcome. We would not hesitate to utilize this firm again and recommend them very highly to you.
Naseem K.
18:35 11 Feb 21
Exceptional customer service. Left Reliance for Delta. Furnace went out Friday evening and was replaced Monday morning. Provided electric heaters to tie us over the weekend. Liam and Brandon were amazing. Checked on us post-install. Highly recommended!
Wendy W.
12:41 08 Feb 21
I got a great quote right away and the company had my new humidifier installed within two days. They were professional, helpful and showed me everything afterwards. Love Delta!
G C.
23:10 04 Feb 21
Staff are very friendly, responsive and helpful. Was quoted a reasonable price to install a furnace filter with associated ductwork changes. I was familiar with component pricing from the Internet and was very pleased to note that there was absolutely no price gouging here!I came to Delta Air Systems for a quote because about 5 years ago it was looking like I may need a furnace replacement and I started soliciting quotations from all the major vendors in town. I found back then that Delta not only gave me one of the best quotes (in fact for a genuine brand-name system it was the best quote), but they were the most thorough in evaluating our heating needs. It turns out that my furnace didn't need replacing after all, but I remembered how impressed I was and didn't look anywhere else to get our current work done.When my furnace does indeed need replacing, I know where I'll be calling!
Charles P.
21:16 22 Jan 21
Great to deal with, from getting a quote to final cleanup after installation. Can't say enough. Tanya is knowledgeable, courteous and gave a competitive price. Jason & Andrew are polite, efficient and meet a high standard of workmanship as well as being considerate and very tidy. Last and certainly not least is Tammy who has a wonderful phone personality. Thank you to all at Delta.
Garfield S.
02:20 20 Jan 21
We have used Delta Air Systems for service and purchases for about 14 years. Appliance service rates a 10 out of 10. Customer support rates a 10 out of 10. Sales rates a 10 out of 10. Installation team rates a 10 out of 10. We had our annual schedule furnace maintenance done on 01/18/21. John the technical had to inform us that the heat exchanger was broken and the furnace was expelling a dangerous amount of carbon monoxide to the outside of the house. This was a safety issue and the furnace had to be shot off. John told us our options of repairing the furnace or replacing it. He contacted home office to get quotes on both. While waiting for this he had them check if the exchanger still had a warranty as the furnace was 2 years past the warranty date. John informed us that the part was no longer available and the manufacture had a program to apply a rebate on a new furnace since the part was not available. My wife and I had already decided it would be best to replace the furnace and have a completely new unit and a new warranty. John immediately asked that a salesrep come out that day and go thru the heating products and the rebate the manufacture would apply. Josh from sales went thru all the information and gave us a rundown of the products available and what was the best in efficiency, quality, and best price with rebates. Josh explained everything and gave us several quotes. We went with his best recommendation and at the time asked that a humidifier be added. Josh did this and also applied a discount to the price. He arranged for next day installation. On 01/19/2001 Liam and Matt arrived with our new furnace and humidifier. They were very courteous and explained the installation they were doing. They answered all our questions about our new purchase and went out of their way to show us everything and how it worked. The installation went smooth and without interrupting our routine. They ensured the floor was covered by tarps and when finished ensured everything was cleaned up. A first class installation. We now have noticed that our house is warmer than before, so we realize that our old furnace was definitely not working up to peak and that it needed replacement. Tammy at head office did all the paper work required. She registered the equipment with the manufacturer, applied for our KW Utilities rebate, the manufactures rebate, and provided us with ,our invoice by email. An excellent performance by the entire Delta Air team. If you require HVAC service or a new HVAC system me and my wife highly recommend Delta Air Systems. We would also like to thank the entire team for their excellent service with this installation and with the service they have provided in the last. And also in the future, our AC unit will be getting its annual service done later this tear by Delta.
Tj F.
00:00 19 Jan 21
Had booked a routine checkup/cleaning for my 30 year old furnace, and Delta had Guy come out to inspect. Unfortunately he delivered some bad news regarding a crack in the heat exchanger and had to turn off the gas for safety. At this point I knew I needed a new system and had heard great things about Delta. Anyhow, John came out to quote us on a new HVAC system and hooked us up with electric heaters until the installation was completed. Monday morning the team came out and was here about 9 hours doing the job. The crew, Steve, Kyle and Brandon were friendly, professional and were willing to answer any questions I had. Full COVID-19 protocols were followed.The new system is working well and is so quiet.Fully satisfied with the experience with Delta
Chris L.
20:35 16 Jan 21
Great company, great response time, great service - the motor on our furnace blew on a Weds morning in January, our new furnace was installed by noon on Thursday! I would recommend Delta to anyone looking for HVAC services! The install guys were great as well - literally rolled out the red carpet to keep the house clean while they took away the old furnace and installed the new one - very courteous and professional service!
Dave W.
16:56 13 Jan 21
Had a problem with my furnace yesterday. Burners were not staying lit. I called Delta and spoke with a lady in service who was friendly and helpful. She advised that she had a technician who had just finished a job and she would send him over right away. He arrived lest than 30 minutes later. Guy (that was his name I think) was very friendly and knowledgeable. He knew what was wrong right away. A simple cleaning of the burner sensor. He checked other areas of the furnace and did temperature checks and everything else was great. He was in and out in 30 minutes.Very thankful for the quick response to my needs
Shane G.
14:24 24 Dec 20
Our experience with Delta Air from start to finish was a pleasure. We had immediate action when our furnace began failing. The sales group was extremely reactive and professional and explain in detail the product, installation and future service. The installers Matt and Rob were top notch. They completed the work quickly and took time to explain what they were doing through the process and not just at the end. When the work was completed they explained the operation and did not rush us through it so we knew exactly what we were doing before they left. We did not have to clean up anything as everything was spotless when the work was done. You won't go wrong using Delta Air Systems!!
Heather G
14:00 23 Dec 20
Delta Air Systems provided us with quick, responsive and professional service. We were looking for a solution to heat our backyard studio and Tammy was extremely helpful. She was able to provide a comprehensive quote over the phone and complete a site visit prior to installation. The installation team were very professional and assisted us with setting the system up on wifi after they completed installation. We would highly recommended Delta Air Systems and their incredible team.
Paul S.
00:02 11 Dec 20
My elderly fathers furnace stopped working in his home Friday Dec 4 at 7pm. Fortunately he also has a gas fireplace so he was able to keep warm. I phoned Delta Air Systems the next day( Saturday) and they had a technician out to his home that afternoon. His furnace was very very old and not repairable. They arranged a new furnace install Monday at 8am. The techs Rob and Matt arrived right on time, removed the old furnace, installed the new one same day. When they left you never would of known anyone was there, super clean job!! Great pricing, super fast service! Five out of five guys!! Thanks so very much! Highly recommend Delta Air Services!!
20:59 05 Dec 20
I called Delta after shopping around and having some less-than-stellar experiences with other local installers. I like to do my research and I don't like the hard sell from pushy reps so Delta was exactly what I was looking for. They were friendly and engaging from the word go and I had an immediate sense I had called the right place. Josh came to the house shortly thereafter and we went through our needs in detail so that he could determine the best options for our house. To say that Josh knows his stuff is an understatement and he makes you feel the way you would if you had a buddy who just happened to be an HVAC expert. Friendly, transparent and sincere... qualities that are in short supply in any industry, but especially with contractors. We discussed and debated and when all was said and done the Daikin system he recommended seemed almost too good to be true. We were looking for a fully variable furnace and air conditioner in order to get the best of both comfort and efficiency. The Daikin system was equal to Lennox in every important spec, plus it had a better warranty, better heat exchanger, and a more durable AC design. And with all of the available rebates the value was ridiculously good, with the fully variable system costing only a couple thousand more than the entry-level system. Josh told me to expect the guys to be at the house for two days because they don't like their installers to rush and want everything to be perfect. Tammy was great in the office with the scheduling and the installers were great. Liam and Vince did a fantastic job on the install, which included cleaning up the previous installers' mess and upgrading the ducting on our existing air exchanger. No nickle-and-dime charges for unexpected details, just top-notch work and professionalism. They made sure we understood how everything worked and left the place exactly the way they found it. We had one weird error message on the thermostat a week or two after the installation and they came the next morning to diagnose and fix it - no problem. Otherwise, the furnace has been exactly as advertised - it's ridiculously quiet and runs consistently at a low level rather than full-on, full-off. I feel like this review is going to read like I'm on the payroll or something, but nope, these guys just deserve credit for running a really good business. It also turns out that as I've recommended them to people I know, a few of my friends and co-workers had already used Delta and had the same opinion as me. Good contractors are hard to find and I can't recommend them highly enough.
Scott K.
13:42 23 Nov 20
Called where they may have been a little late. Technician was knowledgeable and friendly. Looking at getting humidifier system for home.
17:15 15 Nov 20
Had our 5-1/2 York high-efficiency furnace stop working recently. Looked for reputable, well-reviewed heating-cooling companies in Waterloo and found Delta. They came out next day and inspected furnace to find that the main blower motor had failed. Technician was informative, great to deal with, and explained everything about the parts coverage (100% warranty from York) and the service fees. Even got a call from Kelvin, the Delta Service Manager reviewing the work needed. Following day, new part ordered and replaced, different tech but also friendly and happy to explain things, furnace now working like brand new. Highly recommended, personal service, great team, great value for money. Thanks Delta!!!
Stacey P.
14:33 28 Oct 20
We decided to replace our 17 year old furnace, due to the fact it was broke and what we didn't realize is that it was undersized for the size of our home. Josh the sales guy was easy to deal with, no pressure as to purchasing a furnace with Delta, the fact he recommended getting other quotes shocked us. Who does that, a company who believes in what they do and is competitive in pricing. We decided to purchase from Delta and couldn't be more happy. Josh ordered the furnace and with in 72 hours the installers were at our door with a new furnace. Our installation crew was Scott & Liam who did a fabulous job , to putting down drop clothes, and respecting we have dogs so not leaving doors open and when they did require the door open they let me know ahead of time. The work they did was neat, tidy and done in a timely manor. They went over the new thermostat with us to ensure we understand how to use it. I strongly recommend Delta as a first choice for furnace, fire place cleaning and AC units. Thank you Delta, Family owned business in KW for our new Furnace
Rajagopal R
22:41 17 Oct 20
Excellent service starting from sales to maintenance service. All all the staffs are very professional and experienced. Tanya H did a excellent job by explaining all the models and their functions. Also she was able to compare other brands as well. Tammy also very responsive for all my queries. Overall I had positive experience with Delta Air Systems. I definitely recommend Delta with my friends. Thank you everyone !!
M. Fatih Y.
03:00 01 Sep 20
Very professional from getting a quote to having your system being installed. Would recommend to anyone who is planning to have HVAC repaired or replaced.
Jordan V.
14:47 29 Aug 20
From the minute you call them you can tell they’re absolute professionals. Josh took great care of us and made sure we were getting the right solution for our 100 year old home. We ended up going with a 4 head ductless system, which has been amazing so far. Very quiet and has no issue cooling our two story home. Scott and Kyle installed our system and we can’t say enough about the great job they did. The work was done to a very high standard. Probably some of the best overall service I’ve experienced from a business in a long time. Thanks again guys!
Bethany&Greg M.
22:07 18 Aug 20
It was a very, very good experience. I totally get why there are so many 5 star ratings! We had our very old air conditioning unit replaced by Delta after service technician Megan quickly and accurately diagnosed our problem and recommended a new unit. Our salesperson Josh was thorough, inspecting our system and advising what Delta would do on installation including improvements to our duct work. On the installation day, Steve and Julian arrived on time, were very professional, tidy and efficient. They did a great job on the installation. They did everything Josh said would be done and we had cool air again in no time. Delta is very good at customer relations. They return calls, arrive on time and ensure that everything is to your satisfaction. I will not hesitate to call them again. Thanks Delta Air Systems team!
Michael W.
14:31 14 Aug 20
Technically knowledgable. Best pricing. Quality installers.
Helmann W.
18:32 07 Aug 20
Probably the best customer service I’ve experienced in a while. Unlike other companies that tried pressuring me into rental furnaces – or was vague in their offer/charges - Delta Air actually explained their prices and products in detail. That being said, John from Delta Air stayed in touch throughout the whole process and always took the time to answer any questions or concerns I might have had. As for the installation itself, Jason and Andrew were very considerate and professional, while Tammy was incredibly helpful with the warranty/rebates. Cannot recommend this company enough. Thanks again for everything!
15:07 29 Jul 20
We recently had an air conditioner installed in the middle of a heat wave. We were certain that we'd be waiting a month for it to be finished. Josh, Tammy, Liam, and Steve all worked quickly and professionally to get it done fast! Great team. Can't ask for more.
Faye H.
20:19 28 Jul 20
Our AC unit decided to break during a very hot July on a Saturday eve. We called Delta air systems and booked an appt for Sunday. Guy was the repairman who came when he promised and recommended that we needed a new unit. He called the sales dept to set up an appt. Everyone worked with us to quickly get a new unit installed even though it was prime AC season during a pandemic year. Tanya was very knowledgeable and helped us pick the correct unit for us. Scott and Liam who came to install it came at the time promised and were very professional in their work. We would certainly recommend this company again.
chris B.
17:41 27 Jul 20
One day, and done! Dave(?) and team fast, courteous, Scott explained the options, needed some piping redone, as it was no longer in code, they did it quickly, cleaned up after themselves. No problems at all. Great job guys!, Update from original review: Just had the annual inspection, fast courteous, same good service. Update. Just had new air conditioner installed. Steve and Justin worked on it, and I barely knew they were there. Great job (again).
Keith F.
15:23 21 Jul 20
Quite happy with the whole deal. The sales rep was excellent and he actually listened to what I wanted and made it happen. The two installers, Liam and Mike were polite and professional. They stayed till the job was done and cleaned up well. Back office help also was top notch. I've dealt with Aire One and Reliance and won't have them back. Delta got the job done on time as promised.
Terry M.
15:19 21 Jul 20
The service is great and the staff knows what they are doing. Their service person Guy did an outstanding job making sure everything was working properly and it was safe. I would recommend this company.
Daniel M.
15:01 14 Jul 20
A sincere thanks to the Delta team, I am very satisfied with the new Lennox furnace and the installation. My furnace room is a very small space, and presented a tough challenge.But Delta re-assured me that they could do the job, and do it well and to code. They definitely did succeed. They had to move the water heater to do this, but now its a much better install than before and I have a new reliable Lennox furnace to provide comfort for many years.A special mention to the installers Steve and Julian, who were very professional, and did a great job on a very hot July day. Also thanks to Josh (sales), who was very knowledgeable and presented all the options and pricing, and answered all my questions. And thanks to Kevin (install manager) who checked in on install day, and toTammy (office) who registered the furnace and processed the Lennox rebate.In summary, when purchasing a new Furnace and/or AC, you want to get quality and reliability not just from the equipment, but also from the company that is doing the installation.Thanks,Dan M.
Jani C.
02:21 05 Jul 20
We had Delta install a new hot water heating system and ductless air conditioning system last November and we have now had time to evaluate them. It was cold but the crews were great - clean, neat and diligent.The heating system works a treat and we are very happy. We are now in a hot spell and the air conditioner (Daikin) with two indoor heads is doing the job perfectly. Only "complaint" is that it can be a little cold at 21 C inside while it's 33 C outside. We are learning about all the ways we can set up the indoor units to fix that. Nice problem to have. Very quiet indeed and the outside unit is stunningly quiet, too. Neighbors are impressed! Thanks to the AC guys for a great job under trying November circumstances, Yep, we'd do it again. Thanks Delta.
Natasha P.
22:11 04 Jul 20
We recently hired Delta to replace our furnace and install an air conditioner (at the same time). The technicians were extremely professional and did their work with care. This work happened during COVID and they were very respectful and cautious. They showed up wearing masks (before this was required).We were a bit nervous of damage to our hardwood floors throughout the house as they had to bring large equipment through the house. But they put down mats and we didn’t find a scratch or dent when they were done.Communication was excellent throughout the process and the invoice was exactly as it was quoted.We had an issue after installation (the fan was not working properly). We reported it and a technician came in and resolved the issue promptly at no extra charge. I wouldn’t hesitate to hire them again.
Sook B.
19:40 02 Jul 20
Delta Air Systems dedication to customer service was of the highest caliber of professionalism. Vince and Dakota did a great job answering all of my questions, while delivering quality work at an attentive, safe, and considerate pace. I've really appreciated the hard work being done at Delta Air and feel safe knowing they installed my A/C.
Jason Q.
16:20 01 Jul 20
Hi I contacted you a couple of weeks ago about the amazing service I received from Josh>> Well I would like to let you know that your boys came through again.   I had my install done today from Steve.  Once again, amazing person with unlimited knowledge, and really knows how to talk to clients. Felt like I knew him for years.   His helper was Mike.  Mike was a really nice guy to talk to also>> Right from the start with Josh to the install with Steve and Mike,  it made my decision super easy that no other HVAC company is EVER welcome in my house EVER again>> Oh not to mention the energy and positivity from talking with Tammy.  She seems like a great person aswell.>> Just 4 people I dealt with from Delta, amazing experience.   You should be proud of your employees>> Keep up the great work>>> Thanks> JasonThis was a direct email that I sent to the owner. The owner was very pleased to hear these comments
Ann G.
14:57 27 Jun 20
My experience with Delta Air was a positive one from the very beginning with the introduction to Tanya as she came into our home to evaluate our needs. When our air and furnace was being installed by Liam and Tyler, I was impressed by their professionalism and their respect for our home. The job was A-1. Tammy in the office was friendly and helpful. I was very pleased the the whole experience.
21:28 26 Jun 20
Thanks Tanya Hindle for being patient with me in answering all my questions so promptly , it seems you work 24/7.And thanks to the installation crew was Steve & Julian for the Professionalism / Workmanship, made my day.
Tia D.
18:36 26 Jun 20
This spring our 10 year old A/C unit stopped working unexpectedly. We called Delta and they diagnosed it quickly and advised us on next steps right away.We ended up replacing the unit and they were incredibly helpful through the process. Tanya, the sales rep was very professional and the installers, Vince and Dakota were both fantastic. My husband and I were working from home at the time of install and they were incredibly courteous and patient. They cleaned up very well before they left and even went above and beyond by replacing our very finicky drop ceiling tiles for us.Couldn’t say enough good things about the service!
13:11 25 Jun 20
Working in a trade directly with the customers for many years repeat business and referrals are very important. I connected Delta air systems to quote replacement of a central air unit after a co-worker gave me a referral. I was extremely pleased with the service. Steve and Julian where on time , completed the work in the time frame quoted, work was professionally performed and tested .Steve was pleased to show me what he and Julian had done. Explained how to take care of the new air conditioner. Took his time to answered my question before leaving.Josh at Delta air systems was the name my co-worker gave me , give him a call.Dave C
Julie Kate S.
22:01 22 Jun 20
Delta's customer care is excellent not only because their people are knowledgeable but also because they offer free after-service advice and support. They will check in to see that everything is working, that the heating and cooling systems are balanced, that vents are adjusted properly, and that you know how to programme the thermostat and so on. Josh (sales), Tammy (admin), Rob and Matt (installation) are friendly, happy, professional and courteous. They will go out of their way to help you. They were very busy but made sure because we were repeat customers (they also installed our new furnace) that we were a priority in their schedule.
David G.
13:06 19 Jun 20
The rep (Tanya) came out and helped educate us on what our house needed, not what was for sale. She took the time to measure, explain everything, and give us options! Really appreciated it! Jason and Liam did an amazing job installing our new AC! Thanks everyone!
Gord H.
01:01 19 Jun 20
How pleased I am with Delta started before I had problems with my AC ... as a field tech for a telecommunications company myself I went to an employees home (Steve) to install internet. He treated me with so much respect. Because of Steve, Delta was the first company I thought of when our trouble started. The first tech Guy was awesome, but regrettably it was time for a new unit. John from sales was an excellent visit and he knew exactly what we needed. Day came for the install. Vince and Tyler showed up early ... fun guys. They gave us gold plated service. John even popped by to see how it was going. The ladies we dealt with on phone were a class act as well. Basically, A++ all the way! Thanks to everyone.
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A business with a Verified badge has all of their legal and professional requirements vetted by HomeStars — including, most notably, a criminal background check — giving you more peace of mind before inviting Delta Air Systems into your home.

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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