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50+ Years
experience
Emergency
services
Your Trusted HVAC Partner in Thornhill, ON
Founded in 1969 by Dave Langford, Design Air ClimateCare was established with a vision to integrate engineered principles into residential HVAC solutions. Over five decades, we've pioneered industry innovations like our 21-point efficiency startup procedure and proprietary HVAC computer programs. Under President Wayne Langford's leadership since 1987, we've maintained our commitment to excellence through certified technicians and partnerships with organizations like the National Comfort Institute. Our patented dehumidification system and performance-based installation methodology set industry standards. We serve the Greater Toronto Area with comprehensive heating, cooling, and air quality solutions, prioritizing engineered precision and customer satisfaction.

Our team combines technical expertise with practical experience to deliver reliable, energy-efficient systems. We maintain transparency through detailed home evaluations and customized HVAC recommendations. As an Ontario-based company, we adhere to strict licensing and technical training standards. Our reputation for quality installations and maintenance spans generations of homeowners. Today, we continue to uphold our founders' engineering legacy while embracing technological advancements in climate control.
Services
Heating Cooling Air Quality Geothermal Water Heaters Fireplaces Maintenance Installations
Details
  • Year established: 1969
Highlights and features
  • 50+ years of residential HVAC engineering experience
  • Patented dehumidification system technology
  • 24/7 emergency service availability
  • Performance-based installation methodology from National Comfort Institute
  • Certified technicians for all major HVAC brands
Services
Heating
Our heating solutions combine engineered precision with energy efficiency. We install and service high-performance furnaces and boilers for residential properties. Our technicians use diagnostic tools to ensure optimal system performance.
Cooling
We provide advanced cooling systems that maintain comfort during heat waves. Our installations include central air conditioners and ductless mini-split systems. Regular maintenance ensures peak efficiency and longevity.
Air Quality
Our air quality solutions include humidifiers, filtration systems, and ventilation upgrades. We address specific concerns like allergens and humidity control. Aprilaire products ensure cleaner, healthier indoor air.
Geothermal
We specialize in geothermal heat pump installations for sustainable climate control. Our systems use ground-source technology for year-round efficiency. Nordic Geothermal systems provide reliable heating and cooling with lower operating costs.
Maintenance
Our WeCare maintenance plans prevent breakdowns and extend equipment life. Technicians perform comprehensive inspections and tune-ups. Regular service maintains manufacturer warranties and system efficiency.
People
Dave Langford
Founder
Engineering graduate from Queens University with York MBA who established Design Air in 1969. Pioneered residential HVAC engineering principles and developed industry-first diagnostic tools.
Wayne Langford
President
Joined Design Air in 1987 after engineering education at Waterloo. Holds refrigeration/gas licenses and invented patented dehumidification system. Partners with National Comfort Institute for performance standards.
Questions
What HVAC services do you offer?
We provide complete heating, cooling, air quality, geothermal, water heater, and fireplace solutions including installations, repairs, and maintenance.
Do you offer emergency HVAC service?
Yes, we provide 24/7 emergency service with immediate response for urgent heating and cooling issues.
Which areas do you service?
We serve Thornhill, Toronto, Richmond Hill, and surrounding Greater Toronto Area communities.
Are your technicians certified?
All our technicians are licensed professionals with specialized training in major HVAC brand systems.
What makes your company different?
Our engineering background, patented technology, and partnership with National Comfort Institute ensure superior performance-based installations.
Do you service all HVAC brands?
We work with all major brands including Carrier, Trane, Lennox, Rheem, Mitsubishi, and over 25 others.