Mini Split Heating and Cooling Systems

Every home has its own needs. For some, a window air conditioner is the answer; for others it’s a central air unit. But for other people, neither is the answer. Perhaps the home has no ducting, or the cost of a ducted central air seems unnecessary. In steps the mini split (ductless) solution.

Introducing ductless, or mini-split air conditioners. Mini split systems rely on an outdoor unit and anywhere from one to eight indoor modules that are connected by hidden pipes. The system is both effective and energy-efficient.

Contact Delta Air Systems about mini split heating and cooling systems. We’ll apply the same disciplined right sizing approach to specifying your equipment needs.

Lennox Mini Splits

When only certain rooms need heating and cooling, Lennox® Ductless Mini-Split heat pumps and air conditioners provide a smart, flexible solution.

Daikin Mini Splits

If you are looking for a high performance, energy efficient and quiet heating and/or cooling system, consider a Daikin mini split system.

Mitsubishi Mini Splits

Easy to install and maintain, Mitsubishi mini-split ACs and heat pumps are available in single zone systems up to 5 zone systems.

Contact Delta Air Systems for a free quote!

We will provide you with a free estimate of your replacement equipment and provide recommendations and proven solutions based on your needs. Our experts will be pleased to answer any questions or concerns you may have in a friendly, productive, and professional manner.

Fill out the form below and one of our home comfort advisors will contact you shortly.

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Read our reviews and see why we’re Kitchener-Waterloo’s most trusted mini-split installation and service provider.

Delta Air Systems Ltd.
Based on 403 reviews
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!
12:46 24 Jul 23
Delta is our go to spot anytime we have issues with our AC or furnace. Our AC decided to break on us in the middle of a heat wave. The lady I spoke to on the phone with was very helpful and reassuring. The technician came out (I think his name was Liam?) and went above and beyond for us! He was friendly, professional and cleaned up really good after himself. Even our dog (who doesn’t care for people) absolutely loved him- so brownie points for that! Thank you Delta Air Systems Ltd!
Daniel M.
15:44 15 Jul 23
Great service from start to finish. Very responsive, quick to schedule work and answered all my questions. The installation was done beautifully and everything is working great. Would highly recommend!
Mark C.
13:45 09 Jul 23
We recently had an install of a tankless water heater, furnace, and heat pump from Delta. From a sales perspective, Jay was extremely responsive to all of our inquiries prior to purchasing. He is very kind, respectful, and knowledgeable. Having a background and experience in the trade certainly helped. Jay was able to thoroughly answer all of our questions and address our concerns. He provided us with comparisons of the units we were considering, his professional opinion, and a variety of options for us to consider. He educated us in the benefits of a heat pump. We were impressed that he was able to accommodate all of our last minute requests as well during and after install.During the install, Scott and Matt were timely, efficient, clean, and quiet. They were respectful of our home by using mats to walk on and always left things clean and tidy before leaving each day. They allowed for questioning throughout and provided detailed information regarding operating the equipment upon completion of the project.We would highly recommend Delta and had a pleasant experience working with each of the team members.Thank you 🙏
Rick D.
18:00 03 Jul 23
Being a established Contractor, I really appreciated Delta with there professional services snd honesty.
Sumudu L.
20:06 02 Jul 23
Used Delta to replace my old Aircon and installed my Nest Thermostat as well. Friendly, Professional and Neat service. Super chuffed with my new system.
Toronto Living T.
19:42 02 Jul 23
Delta has done an excellent job to install a brand new Daiken HVAC with new ducts. From sales to installation, the service has been outstanding. Team leader Steve was very professional and caring, as if he were installing it at his own house. I highly recommend Delta.
Andy B.
14:42 28 Jun 23
Due to some work completed by another service provider (sub-contracted), we were in a real pickle when we turned on the AC for the first time this year and it wasn't working. The "other guy" recommended full replacement of a 6 year old system. Delta diagnosed and determined parts were under warranty and replaced them in a timely fashion. From the first call with Annie, to our Technician Megan and communication with Jordan (apologies, the fellow who helped with the thermostat was great too), EVERYONE was super professional, helpful and went the extra mile(s) to make a really crumby situation less crumby. Our final bill was 1/3 of what we were told we were looking at for a full replacement. Thank you Delta Air!
Karl N.
18:22 23 Jun 23
I waned to take this opportunity to tell you how we enjoyed the experience of dealing with your company. Specifically, I want to give a shout out to Tanya our salesperson and to Scott our installer. 5 Stars! Highly recommend!
Tom C.
12:12 15 Jun 23
This is the most fantastic company you will find. I had a new furnace and heat pump installed. Jason 1 was amazing in describing the benefits of the system I bought and Jason 2 did an amazing install job with his crew correcting the wiring errors of the previous company. Jordan personally came out along with Zack and provided me with all the information I needed re: the new Ecobee thermostat. This is the best company you will find!!!!
Next Reviews

Benefits of a Ductless Mini-Split System 

Installing a ductless mini-split in your home comes with its own unique set of advantages. Homeowners who choose to either switch to ductless mini-splits or use them as supplemental cooling do so because they provide several benefits including: 

  • Easy and minimally invasive installation 
  • Energy efficiency and monthly savings 
  • Improved air quality 
  • Better comfort control with individualized room temperature 
  • Reduced carbon footprint

How a Ductless Mini-Split Air Conditioner Works 

What differentiates a ductless mini-split from a central air conditioner begins with how the system operates altogether. While a central air conditioner works to create cool air to disperse throughout your home, a ductless system simply removes the heat from the room. 

A ductless system consists of two units: an outdoor unit and an indoor unit. The indoor unit uses refrigerant coils to absorb the heat from the air in your home, while the outdoor unit disperses the absorbed heat into the air outside.

Ductless Vs. Central Air Conditioner: Which is Best for Your Home 

When it comes to choosing the right air conditioning system for your home, it isn’t a question of whether a ductless mini-split or a central air conditioner is objectively better across the board. Both come with their own unique set of advantages, and it’s about finding which features better fit your home and your lifestyle. 

If your home has pre existing ductwork that can be easily fitted with a new central air conditioner, that’s most likely the right choice for you. However, if you have a very old or a very new home that doesn’t have proper ductwork installed, or if you need supplemental cooling, a ductless mini-split may be the way to go.

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