Indoor Air Quality (IAQ) 室內空氣質素設備, 室內空氣質素測試 - Control Method

Methods for controlling contaminants fall into four categories: (1) elimination at the source, (2) ventilation, (3) design, and (4) operations and maintenance procedures. Control of pollutants at the source is the most effective strategy for maintaining clean indoor air. Control or mitigation of all sources, however, is not always possible or practical. Ventilation, either natural or mechanical, is the second most effective approach to providing acceptable indoor air. 

Practical measures for IAQ control are listed below

(a)      Elimination at the source

elimination -- complete removal of biological agent, toxic substance, hazardous condition

and/or contamination source

substitution -- the deliberate use of less hazardous materials wherever possible

isolation -- such as by encapsulation, shielding, sealing, and the use of distance

housekeeping and dust suppression --keep surfaces clean of contaminants, prevent their redispersion, and/or eliminate personal contact

(a)     Ventilation

ventilation -- increase outside air or exhaust for dilution 

 filtering and purification -- filtering system and its proper maintenance

air duct cleaning – suggested at least ones per year

(a)     Design

 new construction -- design steps to prevent problems from occurring; procedures to commission a new building (such as air purging)

renovation design – avoid changes that restrict original air flow and that increase contaminant load beyond HVAC capabilities

 Air Treatment device – provide supplementary help to maintain good IAQ

product or process change – change in process control and component design

(a)     Operation and maintenance

 * maintenance and work practices -- specification for the proper work procedures to reduce or control contaminant releases

* replacement -- insulation, carpeting, wall coverings, etc., which when wet can serve as breeding grounds for micro-organisms, need to be checked regularly and replaced when damaged

 * education, training, labelling and warning procedures

* sanitary procedures and personal protective devices

* coating with anti-microbial material to prevent cross-contamination

*  install air purifier for supplementary help

* storage and disposal of some contaminants -- care and good control practices

提供專業意見, 協助改善室內空氣質素及辨理申請於政府部門註冊証書.

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