exhaust ventilation Articles

  • A new exhaust ventilation system design software

    By industries development, the amount of air contaminants that are released in workplace has grown increasingly. To reduce these contaminants, there are several methods that, one of which is control at source. Industrial ventilation is perhaps the most powerful tool available for environmental professionals to control workplace pollution. Exhaust ventilation can capture contaminants at source, ...


    By University of Tehran

  • Gas Monitoring for Ventilation Control and Energy Management

    The growing demand for underground and enclosed parking and maintenance garages (resulting from limitations on land availability) has increased the awareness and need for proper ventilation and control systems. In addition, increased health and safety programs have only added to the concerns of toxic and combustible gases in confined or enclosed spaces. Historically, ventilation and make-up air ...


    By Arjay Engineering Ltd.

  • Cost Effective Corrosive Fume Exhaust System

    Background:Independent Sheet Metal, a northern New Jersey firm engaged in the fabrication and installation of sheet metal ductwork for heating, ventilation and air conditioning (HVAC) systems had a customer give them a tough assignment. A large pharmaceutical manufacturer requested a recommendation for a cost-effective corrosive fume exhaust system for their multiple scale organic building ...


    By FAB-TECH Incorporated

  • Indoor Cats Improve Quality of Exhaust Emissions

    For over two decades, the automotive industry has struggled to keep up with emission standards by installing emission control systems that are increasingly more sophisticated and expensive.  In the meantime, emission control for materials handling equipment has not been a major concern. Without having to meet stringent ...


    By DCL International Inc.

  • Two approaches to effective ventilation system design for the biomedical device and pharmaceutical industries

    This paper provides two alternative solutions to the difficult task of providing adequate ventilation to operations found in the biomedical device and pharmaceutical manufacturing industries. The first approach involves a two-tier strategy that includes an isolation chamber and an appropriately designed local exhaust hood. The second approach involves the design of modular, walk-in hood. ...


    By Inderscience Publishers

  • Experimental study of a novel thermoelectric domestic-ventilator with heat recovery

    A novel prototype thermoelectric domestic-ventilator with air-conditioning heat recovery of exhaust had been made and tested in this paper. A thermoelectric heat exchanger is integrated with a flat-fin cross-flow heat exchanger in this ventilator. This ventilator is investigated and its cooling (or heating) performance evaluated in terms of the Coefficient of Performance (COP), cooling and ...


    By Inderscience Publishers

  • Effects of trees on the dilution of vehicle exhaust emissions in urban street canyons

    In order to investigate the natural ventilation and air quality of urban street canyons with trees, boundary layer wind tunnel studies at a small-scale model have been performed. Concentrations in street canyons with a tracer gas emitting line source at the ground level and one row of trees arranged along the canyon centre have been measured for several equidistant tree spacings. In the case of ...


    By Inderscience Publishers

  • Case study - Odor treatment in a ventilation shaft of a sewage tunnel

    Bioconservacion’s distributor for municipal biogas and odor applications in Turkey, Biotek Ltd, has recently won a tender for Izmir’s municipal authority IZSU to supply equipment and media for odor abatement coming from a ventilation shaft of a sewage tunnel. These shafts, also known as airshafts or vent shafts, are passages used in different applications such as mines ...


    By Bioconservacion SA

  • Vapor intrusion mitigated through solar-powered exhaust systems

    EPA Region 6 undertook a Superfund removal action earlier this year at the Delfasco Forge site in Grand Prairie, TX, to address trichloroethene (TCE) vapor migrating from a groundwater plume. Region 6 and the State had determined after extensive site investigations that technologies such as soil vapor extraction or natural attenuation would require several years to remove or reduce the plume ...

  • Catalytic Exhaust Emission Control of Small Internal Combustion Engines

    ABSTRACT Gaseous emissions present in the engine exhaust of on-road motor vehicles are subject to stringent exhaust emission 2ontrol standards for carbon monoxide (CO), hydrocarbons, and ...


    By DCL International Inc.

  • Six Ways to Improve Indoor Air Quality Now

    Air quality is an important issue to anyone’s health, and many people don’t realize that their health issues and illnesses could be significantly diminished if their air quality was improved. There is much scientific evidence to suggest that the indoor air can be more polluted than the air outdoors, even in industrialized areas. When people spend eight or more hours a day in the same building, ...

  • Extraction of many emission sources in extensive factory premises - Case Study

    Example: Packaging Similar tasks: Coating, Automobile industry, paint production Different production processes lead to decentralised ventilation of emission sources. These decentralised ventilations are consolidated within a central air pollution control system. A producer of plastic, cardboard and composite material packages uses a range of printing units, laminating machines ...

  • Monitoring Multiple Gas Hazards in Ice Arenas

    The equipment used in an arena such as an ice re-surfacer, ice edger, floor sweepers, lift trucks and other special equipment are more often powered by fuel than electricity. The exhaust produced by the gas, propane or diesel fuel powered machines emits, into the air, carbon monoxide (CO), nitrogen dioxide (NO2) and particulates. Ammonia (NH3) is commonly used in the ice chiller mechanical room ...

  • Ammonia Scrubbing Semiconductor Manufacturing 101

    Semiconductor chip manufacturing utilizes a variety of inorganic acids and ammonia solutions. Mixing of acid gases and ammonia in a ventilation system can result in a as phase reaction producing very fine particulate that is ifficult and expensive to remove. For this reason a large emiconductor foundry on the west coast decided topre-treat the exhaust from the ammonia sources prior o mixing with ...

  • Gas Detection in Recreation Facilities: Can the same detector work for pools and arenas?

    It is not uncommon for the same recreational facility to offer both skating and swimming amenities, two very different environments with different potential gas hazards. Given the fact that there is a possibility of 6 different types of gas to monitor and the large area between the two types of facilities, a single detector will not provide the monitoring requirements for both areas. It is ...

  • Case study of odor and indoor air quality assessment in the dewatering building at the Stickney Water Reclamation Plant

    Indoor air quality (IAQ) and odors were determined using sampling/monitoring, measurement, and modeling methods in a large dewatering building at a very large water reclamation plant. The ultimate goal was to determine control strategies to reduce the sensory impacts on the workforce and achieve odor reduction within the building. Study approaches included: (1) investigation of air mixing by ...


    By IWA Publishing

  • Don’t Let the Welding Fume Plume Make You Sick

    What’s at Stake? Welding poses a unique combination of both safety and health risks to more than 500,000 workers in a wide variety of industries. The risk from fatal injuries alone is more than four deaths per thousand workers over a working lifetime. What’s the Danger? The fume plume is the clearly visible column of fume that rises directly ...


    By SafetySmart

  • What is a Breathing or Respiratory Zone?

    In the past, vehicle exhaust gas detectors have been installed on or near the ceiling. In contrary, Critical Environment Technologies Canada Inc. (CETCI) has always recommended that they be installed in the breathing zone. Recently, Quebec’s regulation has reinforced CETCI’s recommendations. It states that “dusts, gases, fumes, vapours and mists found in the workplace ...

  • Plumbers & Pipe Fitters 853 case study

    Sprinkler & Fire Protection Training Facility The Problem Local Union 853- Sprinkler Fitters of Ontario called on DiversiTech to provide ventilation for their new Sprinkler and Fire Protection Trade Centre and Training Facility. The Solution Two guidelines were presented for consideration before unit selection was made. The school did not want to ...


    By DiversiTech Inc

  • Modelling and simulation of containment retention factor for can-type containment

    Severe accidents cause the failure of fission product barriers and allow the fission products to escape into the environment. The containment is the last barrier for fission products. Thus, containment spray system, heat removal system, recirculation filtration system, Containment Filtered Venting System (CFVS) and containment exhaust filtration system are installed in the containment to ...


    By Inderscience Publishers

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