Packaged rooftop units are the workhorses of the industry. Subjected to the extreme temperatures found on the roofs of malls, retail spaces, offices, and the like, these pieces of equipment just keep chugging along, season after season — at least for a while.
The day eventually comes when the owner actually remembers what’s keeping his space warm and/or cool: that box on the top of the roof that now is not working. Panic ensues, followed by a desperate call to a local contractor.