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Attenuated Low Noise Fan Packages

SysTech Lo-Noise™ Attenuated Fan Assemblies are designed to meet demanding noise specifications, Code, and client requirements that will attenuate noise while removing heated air from buildings. These custom designed low noise fan units, labeled as Lo-Noise™, that reduce noise exiting from buildings that house engines, compressors, fans, and other rotating equipment that might have an impact on the surrounding environment. These packages or assemblies will come complete with exhaust or supply fan, an automatic or manual damper, intake or discharge hood, roof curb where required, and silencer designed for a specific noise level.  Typical control options include Variable Frequency Drives, temperature sensors, or opacity meter.  They are constructed for easy “drop-in” installation with easy access to internal components if maintenance is required.

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Ventilation Equipment Integration Attenuated Supply Fan Packages Attenuated Exhaust Fan Packages Attenuated Rapid Purge Fan Packages Compressor Cooler Silencers Acoustically Treated Air Handlers

Attenuated Supply Fan Packages

General Specifications

Drop-in attenuated supply fan module

SysTech Lo-Noise™ Supply Fan Modules

  • Low-velocity intake hoods with Integral bird-screen
  • Air filter assembly – Side access V-bank with MERV 8 replaceable filters
  • Module discharge
  • Manual or gravity backdraft dampers
  • Two and four-way diffusers
  • Custom paint to match

Lo-Noise™ Section

  • Custom silencer
  • Designed to meet site-specific Permissible Noise Level (PNL)
  • Standard size ranging from 24″ to 60″ length
  • Silencers designed with integral perforated acoustical baffles
  • Up to 8 lbs/ft³ of acoustical media
  • An internal layer of fiberglass cloth to prevent media erosion
  • Acoustic liners on intake hood

Powered Section

  • Fan sizes ranging from 24″ to 60″ diameter standard
  • Motors up to 20 HP standard
  • Motors including Hazardous Rated for Class 1, Division 1, Group D environments
  • The non-sparking fan assembly is standard
  • Adjustable pitch propellers are standard

Attenuated Exhaust Fan Packages

General Specifications

Rooftop attenuated exhaust fan assembly

SysTech Lo-Noise™ Exhaust Fan Modules

  • Weather hood with an internal bird-screen
  • Custom roof curb
  • Integral damper shelf
  • Designed for application-specific roof-slope
  • Gravity or manual backdraft damper available
  • Custom paint to match

Lo-Noise™ Section

  • Silencer – designed to meet site-specific PNL
  • Standard size ranging from 24″ to 72″
  • Silencers designed with integral perforated acoustical baffles
  • Up to 8 lbs/ft³ of acoustical media
  • An internal layer of fiberglass cloth to prevent media erosion
  • Acoustical lining in the hood
  • Acoustical liner in roof curb

Powered Section

  • Fan sizes ranging from 24″ to 60″ diameter
  • Motors up to 20 HP
  • Motor including Hazardous Rated for Class 1, Division 1, Group environments
  • Adjustable pitch propellers are standard
  • The non-sparking fan assembly is standard

Attenuated Rapid Purge Fan Packages

General Specifications

Supply fan assembly with "Gooseneck" intake hood for hazardous gas purge.

SysTech Rapid Purge™ Fan Module

  • Vapor removal and dilution – modules to “sweep” or purge detected hazardous gases
  • Floor level supply and exhaust unit designs
  • High entry/exhaust “Goose Neck” design option
  • Gas LEL and oxygen deficiency sensor control suite available
  • Custom paint to match

Lo-Noise™ Section

  • Custom Silencer
  • Designed to meet site-specific Permissible Noise Levels (PNL)
  • Standard size ranging from 24″ to 60″ length

Powered Section

  • Fan sizes up to 84″ diameter
  • Motors up to 20 HP
  • Motors including Hazardous Rated for Class1, Division1, Group D environments
  • Adjustable pitch propellers are standard
  • The non-sparking fan assembly is standard

Compressor Cooler Silencers

General Specifications

Attenuated compressor cooler

SysTech Lo-Noise™ Compressor Cooler Silencer

  • Airflow rates up to 1,000,000 CFM
  • Sizes from 96″ x 96″ to 360″ x 360″ cross-sections
  • Drop-in modular or one-piece construction, including skid-mount assemblies
  • Construction materials – carbon steel, galvanized steel, stainless steel or aluminum
  • Decibel level reductions to 20 dBA with standard designs
  • Custom paint to match

Acoustically Treated Air Handlers

General Specifications

Custom air handler with 4-inch thick insulated walls for noise attenuation.

SysTech Lo-Noise™ Air Handling Unit

  • Lo-Noise™ designs – up to 4-inch double-wall construction
  • Attenuated sound levels to customer’s specification
  • Explosion Proof rated units available
  • Class 1, Division 1, Group D
  • Class 1, Division 2, Group D
  • Heating capacities up to 1,000,000 BTUH
  • Custom control packages available
  • Side access V-bank filter housing with MERV 8 replaceable filters
  • Heating and cooling designs available

Attenuated Lo-Noise™ Series II Fans

General Specifications

Attenuated exhaust fan modules

SysTech Lo-Noise™ Series II Fan Module

  • Hooded exhaust or louvered intake
  • Manual or gravity backdraft dampers
  • Custom paint to match
  • Unit shipped as one piece

Lo-Noise™ Section

  • Custom Silencer
  • Designed to meet site-specific Permissible Noise Level (PNL)
  • Standard sizes ranging from 24″ to 48″ length

Powered Section

  • Fan sizes ranging from 24″ to 48″ diameter
  • Motors up to 10 HP standard
  • Motors including Hazardous Rated for Class1, Division1, Group D environments
  • Adjustable pitch propellers are standard
  • The non-sparking fan assembly is standard

Contact SysTech today. Send us an email or call us at 800-456-9460.

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