Open Monday-Friday: 8am-5pm
16700 Sideroad 17A, Sunderland, ON L0C 1H0
FAMILY OWNED SINCE 1982
Elevating Comfort Across Sunderland and Surrounding Areas
Welcome to Harold Heating & Cooling — where innovation meets tradition in the heart of your home and business. For over 40 years, our family-owned company has been at the forefront of heating and cooling solutions, serving residential and commercial clients with unparalleled dedication.
WORKING WITH INDUSTRY LEADERS
Whether you're looking to install a new furnace in your home, a geothermal system for your business, or require emergency repairs, we're here to provide you with the best options. As a proud Carrier dealer and Smart Power supplier, we offer the most innovative and advanced products, ensuring you receive top-of-the-line technology and efficiency.
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Our Services
WE OFFER RESIDENCIAL & COMMERCIAL SERVICES
ADVANCED FURNACE SYSTEMS
Experience unparalleled warmth and efficiency in your home.
HEAT PUMP & MINI-SPLIT
Versatile heating and cooling for year-round comfort.
AIR CONDITIONING EXCELLENCE
Stay cool with our energy-efficient air conditioning solutions.
WATER BOILERS & TANKS
Hot water solutions that promise reliability and performance.
INDOOR AIR QUALITY
Enhance your home's air quality with our cutting-edge systems.
GEOTHERMAL SOLUTIONS
Tap into sustainable comfort with our eco-friendly geothermal systems.
DON'T PAY UNTIL 2027
Save Money On All Qualifying Systems
Our commitment to excellence, innovation, and reliability drives us to offer custom-tailored solutions that meet the unique needs of each client. From the moment you reach out to us, you'll experience the highest standards of customer service and professional expertise.
40+ Years of Service
4.5 Star Rating
24/7 Emergency Support
100% Eco-Friendly Options
REAL STORIES, REAL SATISFACTION
Hear What Our Customers Think
The service I received was exceptional. The individuals that installed my air conditioner were clean and courteous. I would highly recommend Harold's Heating.
- Bev Primrose
Excellent service and quick response. They installed a new furnace and hot water tank for me as well as perform my service. Would recommend.
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!
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!