About ONAS
Some things are best left to the professionals.
Ontario Air Services has been keeping Ontario homes and businesses comfortable, safe and energy-efficient for over a decade. We're licensed, insured, and obsessive about quality — from the first quote to the final walk-through.
Why ONAS
Built on craftsmanship and trust.
Certified experts
TSSA & ESA licensed technicians on every job.
Quality workmanship
Done right the first time, guaranteed.
Honest pricing
Upfront quotes, no surprise charges.
Local team
Real people you can reach, day or night.