Contractors like the Altus Corporation often use heavy machinery to hoist HVAC units to the roofs of commercial buildings. A helicopter may be a bit overboard, but there’s nothing wrong with it as long as it gets the job done. Cranes are the common choice for the job, their arms reaching up to almost 30 stories high.
Why can’t good commercial air conditioners be like their lighter residential siblings? The answer lies in their purpose.
As commercial HVAC systems need to heat or cool a wider area (supermarkets, workshops, and offices), they require more (and bigger) parts to provide satisfactory performance. The fan in a window-type air conditioner is anything unlike the one used in rooftop HVAC systems, with respect to size and performance.