• Family-owned & operated
  • Proudly serving Durham Region for 30+ years
1-844-894-6832

Our story: third-generation home comfort specialists.

We established Twintech Heating & Cooling in 1994 to bring honest, high-quality heating and air conditioning services to our local communities. As twin brothers and third-generation tradesmen, we combine decades of hands-on family experience with modern technical expertise to protect your year-round comfort.

How we built our family business:

1949

The foundation is forged

Our family’s history in the industry started in 1949 when our grandfather began his career in the sheet metal trade. He focused on baseline craftsmanship and precise fabrication, establishing the technical standards that our family has maintained ever since.

1949

1970s

Passing the torch

Our father followed directly in our grandfather’s footsteps, expanding the family trade into residential heating and cooling systems. We grew up learning the mechanical trade from a young age under his guidance, gaining practical, hands-on technical skills before we ever entered the field full-time.

1970s

1994

Twintech is born

After working in the industry and mastering our skills, we officially launched Twintech Heating & Cooling in 1994. Today, we bring over 30 years of hands-on field experience to every single job, serving homeowners across Pickering, Ajax, Whitby, Oshawa, Bowmanville, Scarborough, and Markham.

1994

Meet our core team

Professional portrait of Greg Dainty standing with arms crossed.

Grant Dainty

Owner Operator
  • 30+ years HVAC Installation & Service experience
  • Certified Gas Technician G2
  • Red Seal Certified Sheet Metal Worker 308A
  • Certified Residential Air Conditioning Systems Mechanic 313D
  • Manufacturer trained technician

Greg Dainty

Owner Operator
  • 30+ years HVAC Installation & Service experience
  • Certified Gas Technician G2
  • Certified Residential Air Conditioning Systems Mechanic 313D
  • Manufacturer trained technician
Professional portrait of a friendly Twintech HVAC technician wearing a branded blue sweater and glasses.

Bob Graham

HVAC Sales & Install Coordinator
  • 30+ years HVAC Sales experience
  • HRAI trained: Duct Design & Sizing Heating & Cooling Equipment
  • Rebates & Financing Specialist
Professional Twintech HVAC technician in branded beanie and hoodie smiling outdoors.

Mitchell Haley

Lead Service Technician
  • 10+ years HVAC Service & Installation experience
  • Certified Gas Technician G2
  • Residential Air Conditioning Systems Mechanic 313D (registered Apprentice)
  • Manufacturer trained technician

Trade certifications you can depend on.

We protect your household investment by maintaining strict safety and regulatory standings across Ontario:

TSSA registration

Our full registration with the Technical Standards and Safety Authority confirms that our gas and heating work follows strict provincial safety codes.

HRAI membership

Our active standing with the Heating, Refrigeration and Air Conditioning Institute of Canada ensures our environmental and technical practices meet top national guidelines.

BBB excellence

We maintain a consistent A+ rating with the Better Business Bureau for transparent business practices and honest communication.

HomeStars awards

We have been recognized by our local customers with the HomeStars "Best of Award" consecutively from 2018 through 2026.

Experience the difference that real trade expertise makes.

Whether your legacy heating system is making strange noises, your air conditioner needs a precision leak check, or you want a transparent, no-obligation estimate on an eco-friendly heat pump upgrade, our family team is ready to respond. Skip the corporate runarounds and get clear, down-to-earth help today.

Contact us