HUSHCORE™ SOURCE CONTROL SYSTEMS
Source control strategies for air cooled chillers can be combined to produce reductions of 4 dBA to about 10 dBA maximum. HUSH COVER™ removable sound blankets attenuate overall decibels and some tonal frequencies radiated by the compressors and connected piping and components.
Condenser fan discharge noise is attenuated by one of several Unitary™ System designs in the form of a plenum/stack positioned at the top chiller deck where the fans are mounted. Condenser air intake noise which radiates out through the coil intakes on the sides of the chiller may require treatment using direct bolted HUSH DUCT™ acoustical louvers.
Tolerance for source treatments and the back pressure they create will vary among chiller manufacturers and model/vintage configurations. Source treatments should be optimized for aerodynamic performance within the unit manufacturer’s recommended guidelines.
HUSHCORE™ LOUVER™ SYSTEM
The Louver™ System uses high performance type HDAL acoustical louvers up to 12” thick for direct bolting to the chiller cabinet/frame. Typical reductions of the condenser inlet noise are 3 to 5 dBA. Greater reductions can be achieved when combined with other source treatments.
HUSHCORE™ UNITARY™ “TM” TOP MOUNTED SYSTEM
The Unitary™ “TM” System is a top mounted, unit supported plenum style acoustically insulated stack constructed using HUSH GUARD™ sound panels. Condenser fan outlet noise can be reduced by 3 to 5 dBA with this treatment.
HUSHCORE™ UNITARY™ “IS” INDEPENDENTLY SUPPORTED SYSTEM
The Unitary™ “IS” System is an independently supported, wind load rated plenum style acoustically insulated stack constructed using HUSH GUARD™ sound panels. Condenser fan outlet noise can be reduced by 3 to 5 dBA with this treatment.
HUSHCORE™ UNITARYPLUS™ SYSTEM
UnitaryPlus™ Systems are available in both top mounted and independently supported constructions. This variation of the Unitary™ System design adds acoustical splitters or silencer modules to fit inside the HUSH GUARD™ plenum stack for increased performance and where noise sensitive receiver locations are elevated above the equipment. Baffle thickness, spacing and depth determine overall performance.