"The portable heating and air conditioning market has been around but was never seen as a viable option until a few companies started marketing the concept, and it has taken off in the past 10 to 15 years," said Russ Hiroto, president of Atlas Sales and Rentals (www.atlassales.com).
"Now it is used for both temporary and permanent installations in many applications including computer rooms, manufacturing, hospitals, planned maintenance shutdowns, and more. It is a niche market in the sense that portable systems cannot replace rooftop and/or central systems, but the numerous uses have expanded the markets."