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.

Concerned about your Indoor Air Quality?

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

Save Up to $7,100 on Qualfying Heat Pumps

Enbridge Gas has teamed up with the Canadian government and their Canada Greener Homes Grant to co-deliver the Home Efficiency Rebate Plus (HER+) program. Through this program, eligible Canadians and Enbridge customers can qualify for up to $7,100 back on eligible ENERGY STAR® certified heat pumps.

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Testimonials & Reviews

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

Delta Air Systems Ltd.
Based on 413 reviews
Marty S.
01:35 18 Jul 24
Great experience. It started with Jamie in Sales who was knowledgeable and friendly. Dan and Cole did a fantastic job installing our new furnace and a/c. They took extra care to keep our place clean, answered ALL of my questions and were very thorough. We are very impressed.
Graham B.
21:18 08 Jul 24
Phoned early on a Monday morning as the AC system was not working properly. Pleasant and helpful phone call, asked good questions re what was wrong and then advised I would receive a service call Monday afternoon after 3pm. Shortly after 3pm Braedon arrived, pleasant, polite and started diagnostics straight away. Identified problem, explained solutions and sought approval, and then showed me what to check on in case problem came back ( the AC system was installed by Delta 27 years ago, this was first problem). So Braedon was helpful, worked quickly and was successful in fixing the problem. It is good to have knowledgeable and helpful people who both take the call and fix the problem. Delta are #1....thank you
Beth M.
08:10 04 Jul 24
We were looking for a company to install a heat pump to replace our aging gas furnace. We obtained three quotes and Delta provided the best price, in one case many thousand dollars less than another local competitor.However, it is the service that truly impressed us. Tanya was outstanding. She took the time to explain the mechanics, the cost inputs and the applicable rebates. The installation crew did a great job putting in the heat pump and a back up gas furnace. Tanya then came back to tweak the thermostat and review our venting system to maximize air flow to the most important rooms.We are very pleased with the heat pump system and highly recommend Delta Air Systems.
D F.
22:02 03 Jul 24
We received excellent service beginning with our initial phone call about our commercial unit, to the next day onsite visit from Braedon. We were extremely impressed by the prompt and professional response and the overall service. We will not hesitate to call Delta Air Systems again when needed.
Ian B.
14:07 03 Jul 24
Cody was friendly and efficient in his inspection of my Daikin gas furnace.
Oresti T.
22:22 29 Jun 24
Such a thoughtful and professional company, they've got our place cool in the summer, warm in the winter and the bills are better than before. Efficient, clean, HVAC! Jordan and Liam are a team made in climate-controlled heaven.
Gary W.
20:42 27 Jun 24
Arrived on time. The team of Scott & Brodie did an excellent installation, solved minor issues quickly, and tested the new equipment. Well done!
Brando C.
12:29 25 Jun 24
Customers have best scones, great sheet metal work, trustworthy coworkers
Razzle D.
14:52 21 Jun 24
Had them come in this morning to look at our AC that conked out. We thought it might be a different problem, she came in and had it fixed in 10 minutes and we didn’t have to order the part. Could not recommend more.
Samantha B.
20:09 18 Jun 24
Kyle, Fabio, and Jason were amazing. Prompt, professional, knowledgeable, and efficient.
Cam C.
16:05 08 Jun 24
Just had an excellent experience with Delta Air Systems - from Annie at dispatch through to Megan who did our installation, bothwere very professional, provided excellent client service - and are excellent representatives of Delta Air Systems!
Jithin G.
13:57 07 Jun 24
Delta Air systems were truly professional and prompt, right from Consultation to delivery, install & Service with clear & continuous communications throughout. Special shoutout to Mr. Matt Macdonald, Ms. Jordan, Technicians- Kyle & Richard for guiding us throughout with best advice and way forward on the repair & service. Comfort is successfully regained back in our home. I highly recommend them.
18:36 06 Jun 24
Required an air conditioner within a short-time frame. Matt responded very quickly with an excellent quote and service turn-around was fast. Thanks to Kyle and Richard for all their hard work!
Christopher Y.
12:17 06 Jun 24
We recently had a great experience with Delta Air Systems in repairing our air conditioner. From the initial call, to arrival confirmation and the work that the techs did, the entire process was smooth and left us with a working AC!I was impressed that even after the issue was fixed, the techs took the time to inspect the entire system.We have a Carrier system and I wouldn't hesitate to call Delta Air Systems again for help.
Mauricio V.
13:02 04 Jun 24
Delta Air Systems provided me with great service and answered all my enquiries quickly. Jason went over all the options with me and ensured to find a solid system for a great deal. They came next day and completed the work in a single day. Savannah made sure to cover all my floors in order to protect them, and the wiring for the unit is impeccable. Rick ensured the installation of the heat pump was exactly how I wanted it and Kyle ensured to go over the system and the thermostat to ensure I knew what to expect moving forward.I would highly recommend Delta Air Systems to anyone looking for a local reliable and professional HVAC company.
Paul M.
00:22 01 Jun 24
Excellent service. AC installed and setup, working great. All questions answered very well by Braedon. Great Job.
John M.
01:22 31 May 24
Couldn't have asked for a better experience from start to finish! Tanya was very helpful and responsive during the entire quoting process, and even helped resolve a last minute install change I wanted to make. After chatting with the install crew and her, within 5 minutes, they had confirmed the change and it was underway with no Hassel whatsoever.Scott, Savanah, and Jay were all extremely professional while installing our new heat pump and air handler. They were respectful of our house and the entire system looks great. Very clean lines and ductwork.Overall, I would highly recommend working with Delta. It's rare to find such a great team like this!
22:15 28 May 24
I recently had an issue with my thermostat and couldn’t switch it over as I had a Lennox AC/furnace so it wouldn’t take a regular thermostat. I called delta and the lady on the phone who helped me several times figuring it out was excellent. She was very informative and was not monotone, was a very pleasant conversation. She booked me in for the next opening. Braedon was the gentleman who serviced my furnace and thermostat. He was fantastic, friendly and did the servicing very quickly. Fantastic company I would totally recommend them.
21:52 24 May 24
Peter did an excellent job and was very calm clear and concise. Very good and appreciate his explanation and made me feel much more confident about what was going on
Karin T.
20:53 17 May 24
Kyle and Richard installed my new airconditioner the other day - terrific job, guys! Everything left clean and tidy, and the two toads you rescued from my window well thank you too 😁!
Bruce R.
20:55 16 May 24
Wow! The technician, Peter, was so professional and courteous. Explained everything and managed to keep our old AC running. I’ll be back for a furnace check with them!
Robert G.
21:00 08 May 24
A/C turn up. Technician was prompt, professional, removed his shoes. Did a thorough check. Very nice. Please with job.
M. B.
23:30 21 Apr 24
I had an A/C and furnace installed for me by delta air systems. The installer Liam was knowledgable and very professional during the whole process! I would recommend this HVAC company to any family or friend looking for a reliable system.
Brit H.
22:43 21 Apr 24
what an amazing experience from start to finish, first off the tech that came to our home (liam) was very knowledgeable and gave us great advise. next dealing with jordan in the office was an absolute treat. would recommend delta over and over again
dylan D.
22:39 21 Apr 24
Liam and Jordan were exceptional!
Brian E.
12:33 17 Mar 24
Top quality products especially the Lennox line: multi-stage furnace and AC. 💯🙏
Alex C.
22:44 10 Mar 24
Delta has done it again!2024:We reached out to Jordan again, this time for installation of an ERV (energy recovery ventilator). The ERV continuously exchanges air between outdoors and indoors, while recovering heat and moisture. In essence, it's a very efficient way of providing continuous fresh air for improved indoor air quality. We also had the exhaust fan upgraded in the basement bathroom, and had the central vac exhaust vented directly outdoors. The work is nice and tidy, much like our furnace/AC replacement in 2019. The new bathroom fan is much quieter and more powerful than the old one. The motion and humidity sensor is a nice touch. We also really appreciate the improved indoor air quality from the ERV unit. One little extra is that they were also able to fix our central vac canister in the garage (just needed one new part to get it running). Very pleased once again!2019:We reached out to Delta Air Systems to replace our very old and inefficient furnace and AC. The salesperson, Jordan, is clearly very passionate and knowledgeable. She met with us in our home for a free estimate, and carefully walked us through the world of furnaces, air conditioners, heat pumps, HRVs, air purification systems, and more. She was very patient in answering all our questions – and encouraged us to keep asking! She also included an extra reusable air filter (for which she was happy to shop around for us) in the quoted price!Jordan returned the morning of the installation to check in on things and answer any further questions we had. Scott and Liam worked very efficiently to complete the job in one day – but certainly not at the expense of workmanship. These guys are true professionals. Perhaps the best word to describe it is meticulous. In fact, our utility room has never looked better!The new system is extremely quiet – a HUGE improvement from what it replaced. We look forward to many years of quiet and efficient comfort!For all your heating, cooling, and air filtration needs in Waterloo Region, look no further than Delta Air Systems!
Yuri S
01:22 29 Feb 24
Good techs, great company!
A C.
21:46 22 Feb 24
Amazing service! Knowledgeable staff & great customer service! Had a maintenance check for HVAC system recently; had a minor service call a couple of years ago for an overflowing a/c drain pipe due to extended hot days; had an installation to replace our old combi heating/cooling unit 4 years ago. Everyone there is always professional, helpful, polite & provides great advice. Technicians show up on time, respectful, answer questions & give valuable recommendations. Thank you for everyone's great work!
Don V.
18:41 06 Feb 24
Young man was here to do an inspection on my furnace and air conditioner.He did an excellent job and I would be pleased to have him come back at anytime to do any work that is required!
18:33 14 Jan 24
Just like babies aren’t born during the day, when it’s convenient, our furnace waited until it was -11C to give out … and on a Sunday.  Nothing like a worried senior couple.I called the emergency line and Megan listened to me babble and was able to come within a ridiculously short period of time.This is a very experienced HVAC tech – she diagnosed the problem, swapped in a part and had the thing fixed in 10 minutes.  And used the spare time to inspect our coils.This is our second service call.  Braeden came to fix our first issue and he too was professional and competent (and polite).This is the best service experience we’ve had.  Having just moved here from Toronto we now depend on Delta Air Systems for our HVAC support. We highly recommend them.
Rebecca L.
18:09 31 Dec 23
We received fantastic service from the young lady who fixed our furnace. She was knowledgeable and professional, explained the issue to us and was luckily able to resolve the problem on the spot. She gave us some tips to extend the life of our furnace and the price for the service was very reasonable. We did not feel like there was any intent to upsell and believe the technician was working in our best interest to keep our 23 year old unit running as it is in good condition. I would highly recommend Delta as I felt the service provided was top notch.
Neil T.
17:04 03 Dec 23
I waited to review to see difference in utilities over past year. They installed 3 heat pumps in 110 year old house which was complicated due to renovations - getting heat/AC to each room. Jason; Scott; Tyler; Jordan; Zack were extremely helpful in placement of units for most efficient service installation in most unobtrusive place outside conduit and inside units. We have whole house AC now and radiators are augmented by heat pumps so more comfortable heat in an old house. Gas and hydro bills all reduced. As well, admin staff were very helpful. Excellent work and follow-up!! Thank you
Haneen F
15:38 15 Nov 23
Tanya was pleasant to work with. She is knowledgeable and gave us exactly what we needed. Megan H, the technician, was very professional and quick. Overall they are honest company and we trusted them to do the work.
02:49 11 Nov 23
This company is great. Amazing quick service. Super polite and helpful knowledgeable staff. Prices are fair and transparent. On time service. Can’t say enough good things. When stressed cuz you can’t heat your home this service felt like a lifeline!
Kezhen G.
04:10 25 Sep 23
My Lennox AC failed over the summer. Called around, decided to have Delta perform the service. Very friendly on the phone, I described the issue I was having. The technician was dispatched with the part available on the first visit. This saved time and money. Definitely calling them again for my future needs.
J & J plumbing & Custom C.
16:00 08 Aug 23
We had the blower motor go for our ac/furnace on a Sunday morning. Braedon was awesome! Friendly professional and knew his trade. Had the motor out and new one I'm within an hour. Would highly recommend. Thanks again Braedon
Stepan N.
00:31 02 Aug 23
We inherited the HVAC system from a previous homeowner. One day, the A/C unit stopped working, and we made the mistake of calling the A*** O** company (the edits are mine). The company ran a diagnostic and told us that the motor, which pumps air, had failed and needed replacement. They quoted us $1600 for the replacement and also suggested that we might want to consider replacing the whole unit with one that would be covered by warranty. We spoke with their salesperson who tried hard to upsell us on a new air pump system, costing around $12k.Our second call was to Delta. The salesperson, Tanya, was very knowledgeable and explained that we didn't need any replacement as the unit was relatively new and was most likely still under warranty. They were able to verify this the next day and sent us a technician to replace the motor for free, charging us only for the labor.Amazing job, and thank you for keeping the customer's interests a priority!
Dan G.
00:39 01 Aug 23
From the initial call, a technician was at my house in a couple of hours; by the 3rd working day I had a new AC & furnace installed.
Robert S.
12:30 31 Jul 23
I found myself in need of A/C work and spoke with Tanya. She explained all options and always answered in a timely matter. I would highly recommend you to ask for her as she did a terrific job. Thanks Delta team for a great job!
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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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