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!

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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.

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HEATING
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COOLING
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INDOOR AIR QUALITY
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COMFORT

Over 50 Years of Exceptional Value and Service

Associations

Why Choose A1

What Our Customers Are Saying

Google Ranking

4.9 438 Reviews

Always a Great Experience dealing with this company and their people. Twice a year we have our heating and air conditioning inspected and freshened up so that we get efficient performance throughout the year. Today, was no exception. Our A1 technician […]

— John Schunk

Homestars Ranking

 93%  302 Reviews

We have been using A1 for many many years for both our air conditioners and furnaces. We have purchased all equipment from A1over the years for 2 homes. Salesmen are knowledgeable and a pleasure to work with. Maintenance service is always completed […]

— Debbie Chisolm

Facebook Ranking

41 Reviews

Our experience today with A1 A/C & Heating was excellent — as it has been for over 14+ years. Each year we renew Maintenance Contracts for our Furnace & A/C for equipment A1 installed over 12+ years ago — and enjoy year-round care-free climate control in our home […]

— Rod Saunders

A1 Service Areas

Service Areas Map
  • Oakville
  • Burlington
  • Hamilton
  • Milton
  • Mississauga
  • Toronto
  • North York

What's New at A1?

How Can I Control the Moisture in My Home?

We all know that during the winter, the air in our homes can be very dry – we can suffer from dry skin, itchy eyes, irritated nasal passages. We feel static electricity in our hair and clothing. We have all…

Why Are Furnace Filters Important?

We all talk a lot about the basic heating and cooling of our space within our homes- but let’s talk about going beyond that and why it is critical to provide clean indoor air. We all love the smell of…

FAST
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.

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