Link Auditorium

Classic Grand Dame Gets Cool Makeover

The Challenge

Throughout its 115-year history, the Link Auditorium has continually faced a daunting challenge: dealing with the extreme climate swings of the St. Louis region. Due to its central location in the contiguous U.S., St. Louis sits at the confluence of America’s largest weather systems. This means the region experiences the maximum effects of all four seasons. While the spring and fall months are usually temperate, winters can bring extended periods of below-freezing temperatures, while summers often include long-lasting heat waves. Coupled with the area’s high humidity rates, the extreme winter and summer temperatures can be particularly brutal. Since central heating and air conditioning was not widespread at the time of the auditorium’s construction, there was no cooling system included and heat was provided through several hot water radiators located throughout the large performance space and remaining areas, all fed by a central basement boiler. During cold temperatures, the boiler would have to be fired up many hours before a scheduled performance to make the space comfortable for an audience. As there was no way to cool the building during the scorching summer heat, the auditorium simply shut its doors from June through August.

The Solution

As fate would have it, one of the auditorium’s new board members just happened to be the manufacturer of the Unico System, the small-duct central heating and air conditioning system favored by preservationists and the only HVAC product endorsed by the National Trust for Historic Preservation. Unico agreed to supply the equipment necessary to bring the turn-of-the-century property into 21st century comfort without detracting from its original, iconic design. Longtime Unico installer, Unique Heating & Cooling, outfitted the first-floor auditorium and lobby areas with four Unico System air handlers housed in the basement. The flexible supply tubing was snaked through under the stage and all runs terminate in the floor of the auditorium. One-hundred-and-four of the Unico System’s unobtrusive round outlets supply quiet, draft-free, even temperatures to the performance area.

The Results

States Brian Elsesser, president of the auditorium’s Board of Directors, "The Unico System is far and away the best climate control option for historical buildings like the Link Auditorium. The smaller Unico ductwork, compact mechanical units, and unobtrusive diffusers have allowed us to include an HVAC system that has no negative impact on the auditorium’s design aesthetics. In addition, it’s also a low decibel system that doesn’t intrude on performances – the system can be operating at full force during the quietest of performances without being noticed by the audience at all. Unico understands how critical historic preservation is to our mission and that’s why we chose them." Mr. Elsesser notes that the introduction of the new central HVAC system completes the first phase of a five-year improvement plan that includes roof repairs and an elevator to make the second floor accessible to the disabled.