Two 12.5-ton and one 10-ton York Predator convertible, single-package air conditioning and heat-pump units and three 15-ton York Sunline Ultra single-package units provided comfort and humidity control throughout the three tentlike structures that comprised the 20,000-square-foot pavilion.
The First Flight Centennial Foundation erected the semipermanent structure to accommodate the 4 million people expected to visit the site during the next five years.
Both the Predator and Sunline Ultra lines of convertible, single package air-conditioning and gas/electric-heating units offer higher efficiency ratings, say York officials.
According to Joe Simpson, president of installation contractor All Seasons Heating and Air Conditioning in Harbinger, N.C., the HVAC system's ability to maintain balance is regularly challenged.
"The 8,000-square-foot exhibit hall features a 60-foot-wide airplane hangar door at one end to allow aircraft to be brought into the hall for display," Simpson said. "When that door is open, even for a short period of time, the temperature and humidity levels throughout the building are impacted, often for as long as 24 hours."
"Outside temperatures also present a challenge," Simpson added. "Although we need substantial amounts of outside air to maintain positive pressure inside the building, this area sees temperatures in the summer that reach 97 degrees and humidity levels of 80 percent. Because the exhibit houses humidity-sensitive articles, it is extremely important that the heating and cooling system adjust to combat the influence of outside air conditions."