Delta Air Systems Ltd.
HVAC contractor in Waterloo, ON.
In the words of Delta Air Systems Ltd.
Delta Air Systems is the highest rated HVAC company in the Kitchener/Waterloo area for a reason! We have worked very hard to keep the families of KW comfortable for more than 50 years. By reviewing us on Google, Facebook or Homestars, you’ll help keep it that way! Our approach has always been to listen first –fully understanding your needs makes it simple to develop practical and cost effective 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. Established manufacturers with products that are certified, tested and approved!
- Trade
- HVAC contractor
- Business address
- 595 Colby Dr #2, Waterloo, ON N2V 1A1, Canada
- Telephone
- (226) 640-5110
- Website
- deltaairsystems.com
- Hours
-
- MondayOpen 24 Hours
- TuesdayOpen 24 Hours
- WednesdayOpen 24 Hours
- ThursdayOpen 24 Hours
- FridayOpen 24 Hours
- SaturdayOpen 24 Hours
- SundayOpen 24 Hours
From the business's Google listing, checked Oct 2026
- Register
- ON register
Recorded as supplied and as found in public sources. This register makes no credential or quality claim about any business; check license status with the provincial licensing body.
Google Reviews
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We had Braedon at our home for repair and service to our furnace. He explained what he was doing and why it was necessary. He was very personable and answered all of our questions. Going forward, we will use Delta Aire Systems for any issues that arise and annual service checks. Very pleased!!
Philip S.
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Annual checkup was the usual Delta professional service. Braedon was on time, friendly and gave me a summary of his report, which was appreciated,
Gary W.
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Installation of a new boiler replacing very old unit Very professional, organized and tidy installation. Would definitely recommend to anyone.
Philip O.
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I had booked a maintenance service call for my 24 year old furnace and 3 year old AC unit. Megan did a thorough and professional job testing both only to find that the furnace needed a new flame sensor and the AC unit's fan was making an abnormal vibration. The fan motor was still under warranty which DELTA will replace despite them not being the HVAC business that installed the unit 3 years ago. Megan took the time to answer my many questions which made me feel at ease despite her being on a work schedule. I will certainly be contacting Delta when the time comes to replace my furnace...just need one more year out of it! Big cheers to Megan and the service department at Delta Air Systems! A year has passed and I am very pleased with my new HE furnace just installed today. It is much quieter than my 25 year old unit which was also a Lennox installed by Delta in 2001. Both Eric and Liam did a great job on installation with the furnace looking professionally done...neat and clean. I would like to extend my gratitude to Matt MacDonald and Tammy Fountain for their efforts in making my decision to use DELTA AIR Systems a best choice. Thank-you all, Eric, Liam, Matt and Tammy. David Holtz
David H.
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I had an excellent experience with Delta Air when I recently replaced my furnace and air conditioner. The service was professional from start to finish, starting with Tanya Hindle, who quickly determined the best solution and gave me a reasonable quote, and ending with the two technicians, Fabio and Isaiah, who were very skilled and hardworking, who completed the installation professionally and on time. An additional note is that they were careful not to cause any damage to the property and cleaned up the area before leaving. I highly recommend Delta Air, by far the best HVAC company in Waterloo Region (and beyond). I know exactly what I'm talking about (I had quotes from 8 other companies)
Constantin M.
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Wonderful company to work with. Technicians (Tyler and Tyler) were very respectful of our house and even brought carpets to protect the floors. When finished they cleaned up and even offered to move a piece of furniture back into place. Tyler and Tyler were very friendly and explained everything to us including the remote control operation. I would highly recommend Delta to anyone considering a HVAC system.
Greg B.
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Very professional and on time installation of our 1 ton mini split
J R.
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Great experience starting with service call (Courtney, Celeste and Savanah), then sales (Tanya) and finally installers (Eric and Mitch).
Dennis M.
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We are happy with our AC replaced by Delta Air Systems. Tanya provided the quotes promptly and Liam and Drew installed on the day it was scheduled. The job was well done, clean and professional!
Marrieta T.
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In mid-June our old AC started leaking, and we reached out to Delta Air Systems based on their reviews online — spoiler: they didn't disappoint. After the initial technician visit concluded that a new AC and furnace were needed, Tanya came by to take measurements, patiently answered all of our questions and concerns, and walked us through a few quote options. She was friendly and professional throughout, and that was a big part of why we decided to move forward with Delta. The installation was scheduled quickly, and the following week Tyler and Ryan (day one) and Mitch (day two) came out to install both units. All three were experienced, professional, and easy to talk to. Tyler answered my questions and helped me configure the thermostat, and they kept the work area tidy and cleaned up thoroughly when they were done. It's been about a month now, and we couldn't be happier to have a cool home again. We've said more than once how lucky we were to get this done before the summer heat wave and the wildfire smoke arrived. Thank you to Delta and everyone we worked with — great service, and genuinely good people.
Ren W.
About Delta Air Systems Ltd.
Ductless mini-split heat pumps from Delta Air Systems
Delta Air Systems Ltd. names ductless mini-split heat pumps among its Waterloo HVAC work. The company also offers heat pumps, air conditioning, maintenance and tune-ups, indoor-air-quality filters, and residential heating and cooling.
The company offers both residential and commercial HVAC work. It says it provides options around efficiency and performance, and names Lennox, Amana and Napoleon among the brands it discusses. The company says it services the equipment it sells and has more than 50 years of experience.
Waterloo heating and cooling work
Delta Air Systems says it handles emergency calls and inquiries 24 hours a day, seven days a week. Its posted business hours also run 24 hours each day of the week.
Waterloo’s 1981-2010 Environment Canada normals show a mean temperature of 7.3 degrees Celsius, an average high of 12.1 degrees Celsius and an average low of 2.5 degrees Celsius. Delta Air Systems describes its work as including both heating equipment and air conditioning.
The company also names financing, maintenance and tune-ups among its offerings. Its service list includes indoor-air-quality filters as well as ductless mini-split systems.
Delta Air Systems reviews and rating
Reviewers most often mention furnace and air-conditioner maintenance, repairs and replacements, along with boiler and mini-split installation.
They also frequently describe technicians explaining their work, arriving on time, keeping work areas orderly and answering questions. Several reviews discuss annual checks, replacement planning and installations completed as scheduled.
Delta Air Systems Ltd. holds Electrical Contractor ECRA/ESA Licence #7008954.
The company says it has remained in Waterloo while growing its 24-hour emergency service work.
Services, brands and warranty details come from the company's own website. Ratings, hours and reviews come from Google. Town figures come from Statistics Canada and Environment Canada.
More HVAC contractors in Waterloo
About Waterloo
| Population | 121,436 (2021) |
|---|---|
| Average yearly snowfall | 134.4 centimetres |
Sources: Statistics Canada, 2021 Census. Environment and Climate Change Canada, Canadian Climate Normals 1981-2010.