Ontario Heating and Air Conditioning Limited (OHAC Ltd.) began as a family-run HVACR company.  With its humble beginnings, OHAC Ltd. is now a trusted resource for new construction and retrofit, offering full-scope solutions in sheet metal, design build, as well as installation systems and products.  

OHAC Ltd. continues to operate under the same guiding principles; unparalleled quality, safety and customer service.   

Skilled Mechanics & Safety

Service is always met with technicians who continually train and certify their trade and safety skills.  Our long-term customers hold in high regard the rapport and trust built with our carefully-selected technicians.   OHAC Ltd. journeymen are members of United Association Local 787.

The health and safety of OHAC Ltd. employees is integral to our company culture and productivity. OHAC Ltd. is an active member of ISNetworld. We have centralized our compliance data within the program and streamlined our reporting process, making it easier for clients to prequalify our company.