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Open Monday-Friday: 8am-5pm

16700 Sideroad 17A, Sunderland, ON L0C 1H0

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Client Testimonials

At Harold’s Heating and Cooling, our reputation is built on a foundation of technical integrity and consistent reliability.

The following testimonials reflect our commitment to professional excellence, from precision system installations to rapid emergency repairs. We invite you to read the experiences of your neighbors and see why Harold’s remains a trusted name in home comfort.

Had Carly out today! She did a very thorough cleaning and check for furnace and fireplace. Very good at explaining and communicating what she was doing, Great job! Thanks all!

Debbie Auchterlonie

Extremely happy with the service we just received. The guys were very friendly, worked fast and we’re super clean. Will most definitely recommend Harold’s Heating.

Leah Whalen

Thank you to Harold’s Heating for prompt and efficient service. We really appreciated JP’s attention to detail. His customer service and diagnostic skills are exemplary!

Christine Dukelow

Excellent Service. I had the full furnace and AC installed last year and last week and i called for some work and it was immediately resolved by sending two guys on the same day with no charge. Great after sales service. Highly recommended.

Amjad Ali

We got our furnace and AC unit from Harold's Heating full install plus hook up our new kitchen stove...they were excellent to deal with and the staff were very knowledgeable and did a great job...we are very happy with the service we received and highly recommend this company :)

Laurie Berry

I've been inspecting homes for over 23 years, I don't know "Harold's Heating" but I sure know their work! I inspected a home recently where a furnace - A/C upgrade had been completed, and a complete conversion from electric baseboard to forced air gas, fabulous job, well done!

Steve Love

My furnace quit this morning at 5 am . Called harolds  heating and received great service , up and running same day . $200.00 below estimate . Thanks ron akers

Richard Akers

Services: Heating system repair, Heating system installation, Heating system maintenance

Positive: Professionalism, Punctuality, Quality, Responsiveness, Value

Ruth Smith

Positive: Professionalism, Punctuality, Quality, Responsiveness, Value

Great response, always on time, excellent product. Highly recommended.

Services: HVAC duct & vent installation, Install AC

Oleg Belogolovski

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