Own Your Air

Get closer to having that perfect temperature. Humidity just right. Air that is clean and filtered to help you stay healthy and happy.
A1 can help you manage the air in your home. That is our promise.

A1 Furnace Tune-up and Cleaning

Save 30%

Clean things run better. Your furnace will thank you.
Save big on a 32-point furnace inspection, tune-up and cleaning. Only until Feb 28th, 2021.

A1 Indoor Air Quality

Save $150

We want the air in your home to be perfect.
Add moisture back into your home and save $150 on a Genius steam humidifier.
Only until March 15, 2021.

A1 Referral Program

Receive $100

We love it when you tell your friends about us.
Refer a friend to A1 to install a new furnace or A/C and we’ll send you a $100 as a thank-you.

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The best heating and cooling specialists in the GTA

With a proud history guided by three generations of the Messenger family, A1 Air Conditioning & Heating is dedicated to serving our customers with the best HVAC products and services for your home and your business.

Established in 1967, we’ve been a trusted partner for more than 60,000 customers with thousands of installations and repairs over the past 50+ years. Our years of experience and expertise is evident in the quality of our work and our many happy customers.

Quality. Experience. Pride. You can count on A1.

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Our Products



Indoor Air Quality


Water Heaters

  • Furnaces and air conditioners
  • Installations and repairs
  • Indoor air quality
  • Home comfort products
  • Protection Plans

Get a no-obligation quote from A1

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Customers Served


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A1 Service Areas

  • Hamilton
  • Ancaster
  • Dundas
  • Burlington
  • Oakville
  • Milton
  • Mississauga
  • Brampton
  • Georgetown
  • Toronto
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Why Choose A1

Over 50 years of delivering effortless home comfort solutions to our customers!

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