About

30 Years in Business

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.