About Us

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Over 30 Year Experience – 5 Star Rated

At Williams Kool Heat Inc, we believe our success can be contributed to our highly trained and industry certified team of HVAC technicians. Our technicians have experience in emergency service and preventive maintenance of your furnace and air conditioning.

We are dedicated to ensuring our technicians are kept informed to new regulations, industry code compliance and committed to providing ongoing training in new equipment and procedures.

Our reputation and good name has been built on referrals from our satisfied customers. We back all our work with 100% satisfaction guarantee and are dedicated to offering our customers exemplary HVAC service and installations.

With over 30 years of experience, Williams Kool Heat Inc is your best choice for furnace, boiler, air conditioning, water heater and air purification repairs and installations.

  • Furnace Repairs

  • Central Air Conditioning Repairs

  • Water & Pool Heater Repairs

  • 24/7 Emergency Repair Service to All Makes and Models

  • Annual Preventative Maintenance

Dave Williams
Dave Willliams – Owner, Williams Kool Heat

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American Standard Authorized Dealer

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VIESSMANN Authorized Dealer

Contact Niagara’s 5-Star Rated Heating & Cooling Company

Serving all of the Niagara Region:
Welland, Niagara Falls, Port Colborne, St. Catharines, Fort Erie, Thorold, Lincoln, Pelham and more!

Awards & Associations

See 5-star Reviews From Customers Like You

I wanted to pass along a thank you note for the fine job you did this past week. You were very professional and patient with me and took the time to explain to me the problem. The work site was very clean after the work was done. I’m very satisfied and would highly recommend this outstanding company to friends and family.


Excellent service and very thorough. I was very thankful Dave was able to fix my AC on a Friday night of Canada Day weekend. I highly recommend and will call again for any future issues.


Very satisfied with my service. My call was returned right away, and I had the option of him coming to fix it in the dark. I opted for early morning, and he fixed it quickly as well as telling me valuable info about my unit. Professional, efficient and friendly.


Excellent company. Dave is a fantastic guy to deal with and super friendly. And they’re response time for me has always been great. I won’t be going to anyone else that’s for sure!


Fast efficient service. Very knowledgeable and honest as well as reasonable. Thank you for fixing my AC in 30 minutes especially when it’s 90 out there. THANK YOU FOR COMING WITHIN 20 minutes of my call. Best business I’ve dealt with. Very friendly and you didn’t try to steer me the wrong way with price THANK YOU THANK YOU AGAIN Dave Williams.


Excellent service! Thanks Dave for your prompt and courteous service. The AC was up and running in less than 20 minutes. We would highly recommend Williams Kool Heat for anyone looking for quality service at a fair price.


My experience with Williams Kool Heat is what everyone should get. They came in assessed my air conditioning problem and fixed what was wrong no upselling. Would recommend them to anyone, plain and simple honest people.


Very happy with my experience with Williams Kool Heat. Dave and his team are very knowledgeable and friendly. They were also very efficient and true to their word. I would highly recommend Williams Kool Heat to anyone.


Professional. Honest. Responsive. Helpful. Great service. Absolutely the best! I found my new furnace and air repair/service company!


Amazing service. They came out within a few hours of me calling which is just outstanding. The technician that helped me out was excellent, figured out the issue and resolved it in no time. Very educational and showed me how the furnace works, what to look for, and how to avoid a repeat of the issues. Highly recommend! Could not be happier with the service.

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