Welcome to A1 Air Conditioning & Heating, the GTA’s finest residential and commercial heating and cooling contractor. With a proud history dating back to 1967, our third generation family-owned company serves more than 10,000 customers.

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 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?

We repair and service all makes and models 24/7 and offer the GTA’s best emergency service.

Welcome to A1 Air Conditioning & Heating, the GTA’s finest residential and commercial heating and cooling contractor. With a proud history dating back to 1967, our third generation family-owned company serves more than 10,000 customers.

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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 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?

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

Get Emergency
Service Fast!

Over 50 Years of Exceptional Value and Service

Associations

Why Choose A1

What Our Customers Are Saying

Google Ranking

4.8 271 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

 95%  300 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

13 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

Current Promotions

Get Over $1,820 in Smart Home Comfort Savings and Rebates when you purchase or finance a new Daikin FIT and compatible Daikin Furnace from A1. Offer ends July 31, 2019.

Call us for the GTA’s best A/C emergency service. Our helpful technicians will work to solve your issue as soon as possible. We promise to always treat you with respect and the care you deserve.

GreenON

GreenON Rebates have cancelled as of June 19, 2018 but that doesn’t mean your savings did! There are still available rebate programs. Contact A1 today to find the right one for you and your needs!

Whether you’re urgently replacing equipment or upgrading to a more energy efficient system, it’s good to know that the solution that’s best for your home can be yours through affordable financing.

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What's New at A1?

5 Easy Spring AC Tips

Spring is here, and it’s time to get your central air conditioning system ready for the hot days of summer. By giving your AC a spring tune-up, you can save on energy and electricity. Getting it done now is less…

Ontario’s Heating and Cooling Rebates Cancelled

On March 21st, 2019, the Ontario government announced that the Conservation First Framework, including the Heating and Cooling Incentive Program, will be discontinued. In an effort to reduce costs, Ontario’s Minister of Energy, Northern Development and Mines says that the…

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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