37 Commercial HVAC Contractors in Chicago, IL

Commercial HVAC in Chicago means managing both extremes: summer humidity pushing cooling loads on rooftop units and loop systems, and winter cold requiring reliable heat for warehouses, offices, and multi-tenant buildings. The city's 37 commercial-focused contractors average 4.9 stars across more than 8,400 reviews, with 18 offering 24/7 service — strong coverage for a market where system downtime directly affects operations and tenant comfort.

Annual maintenance per rooftop unit runs $550–$2,200. Small-business contracts under 5,000 sq ft range from $1,100–$5,500, while mid-size facilities at 5,000–25,000 sq ft typically cost $3,780–$10,800 per year. Illinois has no statewide HVAC license — local licensing applies — so commercial clients should verify that contractors hold appropriate city or county credentials for the project scope.

Air Flows Chicago - Belmont's reviewer base highlights same-day availability and pricing transparency as standout qualities, with three of eight sampled reviews pointing to rapid response as the primary differentiator. Oasis Plumbing, Heating & Cooling earns marks for honest assessments and professional technician conduct, with reviewers noting fair pricing upfront. Air Flows Chicago (the parent location) draws consistent praise for technician professionalism and long-term client retention, with repeat-customer reviews among the most common patterns in their feedback pool.