Baffle Type Silencers

Conventional baffle type silencers are used in a wide variety of applications:  fan silencing in an HVAC fan-coil unit; for the intake or exhaust of a cooling tower; for blower intakes or exhausts.

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	Intake Silencers for a Diesel-Generator Enclosure  The neighbors across the street from a group of (5) Emergency Diesel-Generator units for a computer, data storage/recovery company, were complaining about the excessive noise.  The originally installed lined intake and exhaust elbows did not provide enough noise reduction.  They were all replaced with these silencers which brought the levels down below the Property Line Limits as specified by the local code.
	Intake Silencer   This picture shows the shaped inlet end of the baffles and the perforated/absorbing section, following it.  For indoor HVAC applications, the outer shell is typically 24-ga. galvanized steel with 26-ga. perforated, galvanized steel baffles.  For outdoor or industrial applications, the gauges are increased for longer life characteristics or in consideration of more rigorous environments.
	Acoustical Louver  In some applications, space is so limited, there is no room for a conventional silencer.  In such cases, an acoustical louver may provide sufficient Insertion Loss and serves the dual purpose of minimizing the intrusion of rain into the room or enclosure.  This cooling air intake for an Emergency Diesel-Generator enclosure provided an acceptable noise reduction and was also aesthetically pleasing.  Note the fiberglass brick fascade which is actually attached to our 4" thick modular steel panel enclosure with a standing seam roof.
	Intake Silencers for a large HVAC Chiller    These 12" deep silencer modules were used to act as a "silencer/barrier" around the three open sides of a large tonnage chiller unit.  They provided the required 10 dbA reduction without affecting the air flow.  They also acted as a "sight-barrier" to the compressors and piping below the coils.  One of this major HVAC equipment manufacturer's design criteria, was to provide a more "elegant solution" compared to the previous sheet metal enclosures around the compressors.