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About Dunn Heating and Air Conditioning

Reliable Heating, Cooling & Plumbing Services Since 1973

At Dunn Heating and Air Conditioning, we’ve been delivering dependable HVAC and plumbing solutions across Waterloo and the surrounding region for over five decades. Since the beginning, our goal has been quick response times, effective problem-solving, and quality workmanship that keeps your household systems operating smoothly.

Whether you’re facing a heating issue, cooling breakdown, or a plumbing concern, our team is available day or night to step in. We offer same-day service, work on all brands, and focus on delivering fast, efficient service with minimal disruption.

Peel service van parked by a brick home highlighting trusted plumbing, heating & electrical expertise since 1973.

Modern Solutions Backed by Decades of Experience

From the days of coal and oil to today’s high-efficiency and smart home systems, Dunn Heating and Air Conditioning has grown alongside the industry. Our certified HVAC specialists and plumbers stay up to date with the latest technologies so we can provide up-to-date advice that works for both your comfort and your budget.

Whether you’re installing a heat pump, repairing a furnace, or clearing a clogged drain, you’ll get a team that comes prepared, experienced, and ready to get things running again.

Smiling Dunn technician standing confidently in front of their green service van, wearing their white issued uniform.

Locally Based. Professionally Driven.

We’re not just another home service provider—we’re part of the community. With our headquarters in Waterloo and service extended throughout the region, including Kitchener, Cambridge, and beyond, our skilled team takes pride in delivering reliable service from the first call to the final result.

With Dunn Heating and Air Conditioning, you’re working with experienced pros who value your time, care about your home, and take pride in every job they do.

What Sets Dunn Heating and Air Conditioning Apart

Same-day repairs and next-day installations

24/7 emergency service available

Licensed, experienced technicians and plumbers

Clear communication and upfront pricing

Personalized solutions based on your home and comfort goals

Complete services in heating, cooling, plumbing & more

Serving Waterloo Region with dedication since 1973

What Homeowners Are Saying

See what customers across the Waterloo Region have to say about working with Dunn Heating and Air Conditioning. From urgent furnace issues to routine AC maintenance and plumbing help, we’re proud to deliver fast, knowledgeable service that gets things back to normal with ease.

Michael Vella
13:26 18 May 25
We had no power to our furnace and a/c. Called Dunn around 1:00pm and they sent a service tech by 3:30pm - same day. Dave B was respectful of our home, knew exactly how to troubleshoot the problem and solve our issue. Very impressive service on a holiday long weekend. Thanks to Dave B and the Dunn team.
Caroline Z
15:36 06 May 25
Erica, Excellent technician! Thorough heating and cooling maintenance
Susan Johnson
14:03 06 May 25
We scheduled our regular annual air conditioner inspection and Randy came by to do the job. Randy has been taking care of our furnace and air conditioner for years and he is always knowledgeable, professional and courteous. Randy and Dunn provide a service we can trust.
Louie Facey
15:23 28 Apr 25
Sean was very knowledgable and friendly!
steve asanin
14:26 28 Apr 25
Great service and staff. AlexD was very personable and knowledgeable. Would highly recommend both Dunn and AlexD!!
They replaced my hot water heater this morning. The most polite, professional and courteous people I’ve encountered in a long time. I would highly recommend this company. Easy to deal with from top to bottom. 😁😁😁😁😁😁
Richard Fuller
16:26 23 Apr 25
The same friendly, competent and timely service I’ve come to expect from Dunn Heating and Air Conditioning. Great job, Sean!
Ken Bast
14:55 23 Apr 25
Sean was very polite and professional. Explained everything he had done and what to watch for in the future.
Andrew Prokopowycz
19:23 08 Apr 25
We have relied on Dave to service our old furnace for about 10 years and could always trust him to do a thorough job. His role is now in sales. He is very knowledgeable and conscientious so we felt confident with his advice on which furnace and a/c to purchase to best suit our home! Also the installers, Alex and Gagan, were a real pleasure to have here as they did a very professional job while being very courteous and thoughtful! These employees are valuable assets to Dunn heating! Thank you!
Jim Hamilton
18:56 08 Apr 25
I recently had a problem with my furnace and am absolutely thrilled with how I was serviced by both Mike and Dave in having it resolved. Dave’s technical expertise and attention to detail were reassuring in knowing that the problem would be reliably addressed. I’m also pleased with the extra care taken to inspect the entire HVAC system for other possible issues. I’m looking forward to years of reliable service from both my furnace and Dunns!
Kim Mallett
21:53 01 Mar 25
Emergency appointment, called a technician arrived quickly to assess. Needed a new furnace. Installers arrived on time on a Saturday, respectful of our home and kitties. Efficient, cleaned up after, made sure we knew how to connect the app and made sure everything was running correctly. Appreciated the install on a Saturday as it is to get cold overnight.
Dunn technician standing by our famous green trucks in a residential neighbourhood.

Areas We Serve

Dunn Heating and Air Conditioning offers heating, cooling, plumbing, and air quality services throughout the Waterloo Region, with responsive support in:

  • Baden
  • Elora
  • Fergus
  • Guelph
  • Waterloo
  • Cambridge
  • Conestogo
  • Kitchener
  • Elmira
  • St. Jacobs
  • Linwood
  • New Hamburg
  • Heidelberg
  • Rosendale
  • Wallenstein
  • Bloomingdale
  • St. Clements
  • Winterbourne
  • West Monrose

Let’s Get Your Home Back on Track

When your home’s systems need quick, reliable attention, Dunn Heating and Air Conditioning is here. We’re available 24/7, offering flexible appointments and fast, effective solutions—because your comfort matters.

Call us at (226) 887-3052 or book your service online today.

Two Dunn technicians smiling in front of their green service van, wearing issued jackets during an on-site consultation.