Rounded Corners

Exhaust Systems

A variety of different applications in many industries, each with its own set of restrictions and requirements, utilize exhaust systems. Whether the system is moving large volumes of air, requiring high velocities, needing high static capabilities from the fan or a combination of all three, a noise and vibration analysis is necessary to arrive at the best possible noise control solution.

Garage Ventilation

Problem Solution

Garage Ventilation

Environmental noise if the garage exhaust fan is close to the property line. Garage noise, which makes it difficult for people to hear 911 distress calls. For both  noise problems, maintaining low pressure drop is imperative.

This process always needs to start with a systems analysis that includes transmission loss calculations, aerodynamic analysis and a survey of the project-specific requirements (space, IAQ, pressure drop, and cost). A project-specific solution can then be selected and applied. 

Intake and discharge silencers will likely be required. 

Case Study: Golden Gate Underground Parking Garage, San Francisco

Laboratory Exhaust

Problem Solution

Laboratory Exhaust

Environmental noise is a common concern due to the high sound levels of lab exhaust fans. Choosing silencers that are aesthetically pleasing (architects concern) and self-supporting (no guide wires), while also being durable to the elements and preventing leakage, poses the major challenge.

Laboratory Exhaust Stack Silencers - Different materials including stainless steel might be required as well as different sealing techniques to prevent leakage. Silencers should be self-supporting for wind/seismic loading to avoid guide wires and should include an architectural finish depending on the need. 

Kitchen Exhaust

Problem Solution

Kitchen Exhaust

Meeting property-line noise levels while also dealing with grease buildup and NFPA code compliance.

No-Media silencers with full access to all chambers for cleaning. A silencer can be designed to meet NFPA code (16 ga, continuously welded, drain, access doors, etc). However, they are not listed and final approval is the responsibility of the local code official.

Isolation Room Exhaust

Problem Solution

Isolation Room Exhaust

Environmental and occupied space noise. Other problems include contamination of acoustic media and leakage.

General Exhaust

Problem Solution

General Exhaust

Environmental and occupied space noise from the exhaust fan while maintaining low pressure drop. Structure-borne noise is also an issue.

This process always needs to start with a systems analysis that includes transmission loss calculations, aerodynamic analysis and a survey of the project-specific requirements (space, IAQ, pressure drop, and cost). A project-specific solution can then be selected and applied.
Intake and discharge silencers
will likely be required.
Steel base with springs might be needed

Projects: Manchester Cogeneration Plant, William Davis Computer Center

Dust Collectors

Problem Solution

Dust Collectors

Environmental and occupied space noise while preventing particulate build-up in the silencer.

No-Media silencers with full access to all chambers for cleaning.
No Plug silencers with a unique internal design that prevents the buildup of particulate.
Enclosures installed around the dust collectors with access doors are another good solution.

Project: Armstrong Manufacturing Plant