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McMillan Refrigeration is a Canadian-owned HVAC company serving Lakefield with reliable, high-quality heating and cooling services. With decades of experience, we provide honest recommendations, efficient solutions, and dependable workmanship tailored to Ontario’s changing seasons. Our focus is simple — long-term comfort, performance, and customer satisfaction.
We prioritize your comfort and satisfaction, ensuring every job is completed to the highest standard.
We use modern HVAC technologies and smart solutions to improve efficiency and long-term performance.
Our experienced technicians deliver dependable, high-quality workmanship on every installation, repair, and maintenance service.
We provide clear, upfront pricing with honest recommendations — no hidden fees or surprises.
Keep your system operating at peak performance with routine maintenance. Our inspections and tune-ups improve efficiency, reduce breakdowns, and extend the lifespan of your heating and cooling equipment.
When your system fails unexpectedly, our team is ready to respond. We provide prompt emergency HVAC services to restore comfort and minimize disruption when it matters most.
McMillan Refrigeration has been proudly serving communities like Lakefield for decades. As a Canadian-owned company, we are committed to delivering reliable HVAC services backed by experience, professionalism, and a strong focus on customer satisfaction.
With a long-standing reputation for dependable service, we’ve earned the trust of homeowners and businesses by consistently delivering honest advice and quality workmanship.
We design and service HVAC systems to perform efficiently in Ontario’s climate, helping you stay comfortable while keeping energy costs under control.


We provide complete HVAC services, including installation, repairs, maintenance, and indoor air quality solutions. Our team works with both residential and commercial systems to ensure reliable year-round comfort.
We recommend servicing your HVAC system twice per year — once in the spring for cooling and once in the fall for heating. Regular maintenance helps prevent breakdowns and improves efficiency.
If your system is over 10–15 years old, requires frequent repairs, or is no longer performing efficiently, it may be time to consider replacement. A professional assessment can help determine the best option.
Yes, we install modern, energy-efficient heating and cooling systems designed to reduce energy consumption and improve comfort. We help you choose the right system for your needs and budget.
Whether you need installation, repair, or maintenance, our team is ready to help. Contact McMillan Refrigeration today to schedule service and experience reliable HVAC solutions built for comfort and efficiency.

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Monday - Friday
9 AM - 5:30 PM