About Us

Your Residential & Commercial HVAC Specialists!

Cullen Heating and Air Conditioning Inc. has been providing quality service for homes and businesses since 1970.
As your Durham Region heating and air conditioning specialists, we offer a number of services to keep you and your family comfortable year-round. Whether it be heating, cooling, or taking care of the air you breathe – we can do it all!

We Specialize In:

Cullen Heating & Air Conditioning, hvac contractor, furnace repair, air conditioner repair, air conditioner installation, furnace installation, water heater rentals, free estimates, conversion from oil or electric, gas meter, heat pumps, humidifiers, ductless heat pump, air cleaners, ductwork, HVAC Oshawa, Heating and Air Conditioning, Oshawa, Durham Region, Oshawa, Whitby, Clarington, Courtice, Bowmanville, Newcastle, Port Perry, Ajax and Pickering
  • Furnaces
  • Air Conditioners
  • Duct Work Conversions
  • Humidifiers
  • Rentals
  • Air Cleaners
  • Hot Water Tanks
  • Programmable Thermostats
  • Fireplaces
  • And More!

Award Winning Service

Our customers have nominated and voted for us as their Heating & Air Conditioning Company for several years in the Oshawa Whitby Readers Choice Contest.

We’re also part of the Better Business Bureau. We have maintained an A+ rating and have been accredited since September 2010.


Financing available to qualified customers through Vista Credit. Contact us for details.