{"id":17270,"date":"2016-06-30T15:03:21","date_gmt":"2016-06-30T19:03:21","guid":{"rendered":"http:\/\/www.constructionspecifier.com\/?p=17270"},"modified":"2017-01-20T12:21:46","modified_gmt":"2017-01-20T17:21:46","slug":"hiding-hvac-in-plain-sight","status":"publish","type":"post","link":"https:\/\/www.constructionspecifier.com\/hiding-hvac-in-plain-sight\/","title":{"rendered":"Hiding HVAC in plain sight"},"content":{"rendered":"
\"The<\/a>
The three large beige boxes in the middle of the \u2018K\u2019-shaped building\u2019s roof are plenums that also aesthetically cover the newly installed energy-recovery ventilation (ERV) units from street view.<\/span>
Photos courtesy SEMCO<\/em><\/figcaption><\/figure>\n

What do you do when there\u2019s no room to retrofit an HVAC exhaust air system inside a building? Take it outside and hide it behind architectural accoutrement.<\/p>\n

This was the solution implemented at Saint Thomas West Hospital in Nashville.<\/p>\n

Instead of space-consuming conventional indoor HVAC ductwork, the retrofit created return-air distribution to new rooftop energy-recovery ventilators (ERV) through ducts constructed of acoustical panels on the hospital\u2019s exterior. To hide the ductwork from the building\u2019s fa\u00e7ade, the design team came up with a support mount system.<\/p>\n

Built in 1973, the hospital\u2019s seven-story K Tower required an upgrade to its HVAC system that provided cost-cutting energy recovery, preheated increased outdoor air, and enhanced indoor air quality (IAQ).<\/p>\n

The HVAC project was part of a four-year, multi-phase $95-million renovation of the 195,096-m2<\/sup> (2.1 million-sf) campus. The retrofit also helps the building meet current American Society of Heating, Refrigerating, and Air-conditioning Engineers (ASHRAE) 170, Ventilation for Health Care Facilities<\/em>, enhancing IAQ for patients and employees.<\/p>\n

\"A<\/a>
A ground-level view of the side of the building. The middle track is aesthetic acoustic panels used as ductwork to collect air from each floor and transport it to the roof.<\/span><\/figcaption><\/figure>\n

Maintaining the building\u2019s aesthetics was a priority. The panels\u2019 custom factory powder-coated sandalwood color matches the building\u2019s exterior and blends into the fa\u00e7ade\u2019s exterior. The panels also have custom factory-designed 3.8-m (12.6-ft) lengths. When combined with a 152.4-mm (six-in.) wide metal support band, the panels match up with the building\u2019s precast concrete seams, which are spaced at 4-m (13-ft) increments. As a result, the panel and building seams match and appear continuous.<\/p>\n

Custom-designed to remain unseen, the riser suspension system also allows for seismic and wind loads using hidden wedge anchors drilled into the precast concrete. Unseen 127 x 127-mm (5 x 5-in.) tubular steel stubs incorporated into the building-side of the panels connect to the wedge anchors. The result is a riser with no visible support structure.<\/p>\n

Collecting the exhaust air from each wing riser is a 1.8 x 3.7 x 19-m (6 x 12 x 63-ft) plenum, also constructed of acoustical panels. The plenum aesthetically appears as a rooftop architectural fa\u00e7ade and hides the three packaged ERV units from street-level view.<\/p>\n","protected":false},"excerpt":{"rendered":"

What do you do when there\u2019s no room to retrofit an HVAC exhaust air system inside a building? Take it outside and hide it behind architectural accoutrement. That\u2019s the solution implemented at Saint Thomas West Hospital in Nashville.<\/p>\n","protected":false},"author":6,"featured_media":17272,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4,179,449,197,336,460,461,466],"tags":[3289,103,3266],"class_list":["post-17270","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-form-and-function","category-masterformat","category-uniformat","category-23-00-00-heating-ventilating-and-air-conditioning-hvac","category-23-30-00-hvac-air-distribution","category-b20exterior-vertical-enclosures","category-b30exterior-horizontal-enclosures","category-d30heating-ventilation-and-air-conditioning","tag-erv","tag-hvac","tag-tennessee","entry"],"acf":[],"yoast_head":"\nHiding HVAC in plain sight - The Construction Specifier<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.constructionspecifier.com\/hiding-hvac-in-plain-sight\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hiding HVAC in plain sight - The Construction Specifier\" \/>\n<meta property=\"og:description\" content=\"What do you do when there\u2019s no room to retrofit an HVAC exhaust air system inside a building? 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