Topp Portable Air is celebrating 20 years of business in August 2011. Topp is a leading source for rental and sales of portable air conditioners, temporary heaters and large-area dehumidification equipment. Based in Aston, Pa., Topp has 15 additional locations in the United States, more than 100 employees, and has been featured on the RER 100 and Inc. 500.

“What started out 20 years ago, with just three employees, has steadily grown into a business far exceeding anyone’s expectations,” said Daniel Topp, president and founder of Topp Portable Air. “Our quick response, 24/7 service and same-day delivery is what earns us lifetime customers.”