HUSHCORE™ PATH CONTROL SYSTEMS
Modular HUSHCORE sound enclosure path barriers provide reductions of between 10 and 20 dBA depending on the chiller baseline frequency signature and the panel type used. With indoor chillers located in crowded mechanical equipment rooms, the critical trade-off is available space for the enclosure footprint while maintaining equipment clearances for serviceability and personnel access/egress. For that reason, flexible curtain enclosures (10-12 dBA reduction) are generally preferred over rigid heavier sheet metal acoustical panel designs (18-20 dBA reduction). Curtain enclosures can generally follow the equipment footprint with very minimal clearance as service is easily accomplished by sliding panels out of the way on overhead tracks. Metal panel enclosures require greater clearances and utilize lift out access panels that are limited in size because of their weight or hinged access doors where door swing clearances may be difficult to accommodate.
Enclosure path treatment selections are driven by cost, performance and footprint. Consideration must also be given for the ventilation requirements of the installation. Most indoor chillers have hermetically sealed liquid cooled compressor/motor assemblies. Heat rejection in such models is limited and does not warrant enclosure forced ventilation for heat dissipation. The location of refrigerant relief valves and possible need to ventilate for code compliance is an additional consideration.
HUSHCORE™ PREMIUM™ SYSTEM
The Premium™ System is a modular HUSH FLEX™ acoustical curtain enclosure consisting of a galvanized steel skeletal framework with sliding perimeter panels suspended from track rails with roller trolleys. Velcro removable roof panels and a track valance complete the full enclosure capable of producing reductions of 10 to 12 dBA. This option provides the lowest $ per dBA performance reduction.
HUSHCORE™ PREMIUMPLUS™ SYSTEM
The PremiumPlus™ System is a hybrid design combining the Standard™ System HUSH COVER™ source treatment for the compressor circuits with the Premium™ System HUSH FLEX™ acoustical curtain enclosure. This high performance hybrid system can achieve reductions of 12 to 15 dBA.
HUSHCORE™ ULTIMATE™ SYSTEM
The Ultimate™ System is a modular HUSH GUARD™ metal panel enclosure consisting of high STC double skin solid/perf. Galvanized steel perimeter and roof panels with strategically located access doors and removable panel sections for operational and service access. Reductions of 18 to 20 dBA are typical for this high performance design most commonly used for critically sensitive applications.