If you are installing or upgrading an HVAC system in a commercial building, work with a heating and cooling professional who is certified to work in commercial settings. Both types of building have unique needs. Call Naughton Mechanical at 219-365-7055 in Indiana. Call 708-841-0637 in Illinois Heating and cooling a commercial space is quite different from heating and cooling a home. In a commercial space, you typically have a much larger space that needs a larger HVAC system.