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A Professional Engineering Company

In 1969 Dave Langford, armed with his engineering degree from Queens University and his MBA from York University, founded Design Air with a vision to incorporate engineered values and principals in a residential focused HVAC business. Over the years Design Air has been a leader in developing and implementing many firsts in the industry.

  • A 21 point engineered efficiency start-up procedure
  • An engineered survey sheet to evaluate the home, and home owner's HVAC requirements
  • An industry specific HVAC computer program

In 1971 Dave's brother Wayne joined Design Air after attending the University of Waterloo in engineering. Wayne continued in his education attending Carrier programs in Syracuse NY, Los Angels CA, and here in Toronto, and along the way received his refrigeration and gas licenses. In 1987 Wayne invented a dehumidification system for which he received both a Canadian and USA Patent.

Currently Wayne is the president of Design Air and continues to stay the course set by his brother by offering superior levels of installations and services with our own hourly paid mechanics.

Wayne is proud to have teamed up with National Comfort Institute a USA training and business company to offer Design Air Customers a "Performance based HVAC installation", that can only be offered by the very best contractors in North America.

Our Affiliations:

I invite you to allow Design Air to install your next system and add you to our list of satisfied customer's.

What to look for when you’re buying a furnace

What to look for when you’re buying a furnace

ENERGY STAR® qualified furnaces will save you money on your heating bills — and they're better for the environment.

Door-to-door sales agents can leave you out in the cold

Door-to-door sales agents can leave you out in the cold

There are many door-to-door sales agents promising great savings on furnaces. These savings may seem hard to believe. Don’t be fooled.

Air quality and safety in the home

Air quality and safety in the home

You can reduce the risk of dust particles, bacterial growth, radon, carbon monoxide poisoning, gas leaks and fires by keeping the condition of your furnace clean and efficient.