Heating & Cooling Specialists in the GTA

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 30,000 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.

Heating & Cooling Specialists in the GTA

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.

Read More

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

4.9 438 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

Current Promotions

Buy any Furnace for a chance to WIN a SuperSmart Home Bundle

Huge Savings on GENIUS Furnaces and ACs. This special discount of up to 15% is for a limited time only.

Get your furnace winter ready. Save $30 on a furnace tune-up.

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?

8 Tips to Getting Your Home Vacation Ready

You’ve packed your bag, said your goodbyes and you’re about to embark on your well-deserved holiday.  You feel prepared for your trip, but is your home? Maybe you’re headed to an icy destination or you’re a snowbird flying somewhere hot. …

Getting Your Furnace Ready for Winter

The days are shorter, the nights are cooler and the leaves are turning colour; all signs that winter is on its way. These are also cues that it is time to begin preparing for the cold. Aside from acquiring a…

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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