
The Best Heating & Cooling Specialists in the GTA
With a proud history dating back to 1967, our third generation family-owned company serves more than 30,000 respected customers. We’ve built our business by treating our customers in the best possible way…how we would like to be treated. Try us, you’ll see!
With over 50 years of experience designing, installing, and servicing heating and cooling systems, we can help you choose the most cost-effective and efficient system for your home or business.
- Looking to have a new furnace or AC installed quickly and expertly?
- Need your furnace or AC repaired by a caring, knowledgeable, reliable technician?
- Need to improve the air quality in your home? We have the newest solutions for you.
We are committed to offering you safe, contact-free service. Your comfort is essential to us.
Enjoy the safety of your own home. No-obligation sales quotes can be done upfront through any virtual video platform of your choice. We don’t have to come into your home to answer your equipment needs.
We are “PPE covered.” Our expert installers wear professional-grade masks, gloves, and foot covers. We promise to completely disinfect any surface we touch. You won’t even know we were there.
Ease of payment. You can prepay for your service or installation. No need to touch a card handheld unit.
Heating & Cooling Specialists in the GTA
Welcome to A1 Air Conditioning & Heating, the GTA’s best residential and commercial heating and cooling contractor.
With a proud history dating back to 1967, our third generation family-owned company serves more than 30,000 respected customers. We’ve built our business by treating our customers in the best possible way…how we would like to be treated. Try us, you’ll see!
We’ve built our business by treating our customers in the best possible way…like we would like to be treated.
With over 50 years of experience designing, installing, and servicing heating and cooling systems, we can help you choose the most cost-effective and efficient system for your home or business.
Looking to have a new efficient furnace or AC installed quickly and expertly?
Need your furnace or AC repaired by a caring, knowledgeable, reliable technician?
Need to improve the air quality in your home? We have the newest solutions for you.
We repair and service all makes and models 24/7 and offer the GTA’s best emergency service.
Over 50 Years of Exceptional Value and Service

Why Choose A1
What Our Customers Are Saying
A1 Service Areas

- Oakville
- Burlington
- Hamilton
- Milton
- Mississauga
- Toronto
- North York
What's New at A1?
FACTS
A1 Air Conditioning & Heating has been owned by the Messenger family for three generations.
A1 has a cute, little mascot named Celcius!
A1 Air Conditioning & Heating employs a full-time Quality Assurance Inspector to make sure that your system operates at peak levels.