Centura Avista Adventist Hospital When Centura Avista Adventist Hospital in Louisville, Colorado was planning an expansion to its surgery wing, project architect Cator Ruma & Associates considered the key issues of performance, maintenance and appearance when designing the roof-top duct work required for the expansion. Traditional duct wrap materials, such as berglass duct board jacketed with aluminum or elastomeric insulation with a UV protective coating, would not withstand the harsh weather conditions experienced in the Colorado Rockies, especially considering the need for low maintenance and attractive appearance. Fiberglass duct board can absorb moisture if the aluminum jacket is damaged. Seam failure can be common as the caulking fails, allowing moisture to penetrate into the ins

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