Air Movement and Control Association

Ventilating and industrial fens are classified by the Air Movement and Control Association, Inc. (AMCA) as shown in Table 12-11 and Tables 12-12Aand 12-12B with more detail. 

Fans are classified according to the discharge pressure. Reprinted per written permission from the Air Movement and Control Association International, Inc., the AMCA Standard 99-1401-66 from Standards Handbook 99-56 1986, the total static pressure classification for operating limits for central station units is as follows ... 

Figure 12-119A, Page 2 of 2. AMCA standard drive arrangements for centrifugal fans. (Reprinted from AMCA Publication 99-86 Standards Handbook, 1986, Standard AMCA No. 99-2404-78, with written permission from Air Movement and Control Association International, Inc., 1986. All rights reserved.)...

Used by permission Heating Ventilating Air Conditioning Guide, V. 27, 1949. Reprinted from AMCA publication with written permission from Air Movement and Control Association, Inc. 

Determine whether the 6,060 cfm at 400°Fand against 1 V2 -in. static pressure can be used to select a fan from the manufacturers tables. The manufacturers tables are prepared in accordance with the industry standard set up by the Air Movement and Control Association. These tables are based on standard air. 

The Air Movement and Control Association International, Inc., at www.amca.org has publications available concerning exhaust fan safety. 

Air Movement and Control Association, Publication 99-86, Standards Handbook, AMCA, Arlington Heights, IL, 1986. 

Reprinted from AMCA Bui B. 110, 1952. National Association of Fan Manufacturers, with written permission from Air Movement and Control Assoc., Inc. 

Carbon dioxide measurements require specialist test equipment and were not carried out in the context of this quick evaluation. The office survey did not detect any subjective phenomena to suggest a problem with CO2 concentrations. The results of the subjective evaluations are presented in Table 13.9 and Table 13.10. Table 13.9 shows that respondents reported that the control room was both too cold and too hot, in addition to too little air movement and the air being too dry. Measurement of temperature (sampled range was between 20.1 and 22°C with a mean of 21°C) and relative humidity (sampled range was between 30.6 and 35.7% with a mean of 33.8%) showed that they were within acceptable limits. Table 13.10 shows the reports of symptoms experienced by people in the control room that may be associated with the environmental conditions. Over half of the respondents reported sore throats and congested noses, and approximately half reported sore eyes, mental fatigue, headache, and tiredness. 

While some aspects of weather can be explained in terms of air mass movements, other synoptic-scale features of weather systems are associated with cyclones and anticyclones. Cyclones and anticyclones are large eddies (hundreds of kilometers across) in the atmosphere. Within their boundaries they influence and often control the direction and speed of wind and dominate the weather on a regional scale. They also influence the advective transport of air pollutants and subsequent air quality. On a global scale, cyclones and anticyclones contribute to tropospheric mixing. 

A diffusive/passive sampler is a device which is capable of taking samples of gas or vapour pollutants from the atmosphere at a rate controlled by a physical process such as diffusion through a static air layer or permeation through a membrane, but which does not involve the active movement of air through the sampler (Brown, 1993 Moore, 1987). Compared with methods requiring pumps for active air movement, diffusive samplers are more convenient and have lower associated costs. 

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