SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Demonstrate knowledge of air filtration systems as used in air-conditioning and ventilation systems 
SAQA US ID UNIT STANDARD TITLE
13479  Demonstrate knowledge of air filtration systems as used in air-conditioning and ventilation systems 
ORIGINATOR
SGB Air-conditioning Refrigeration and Ventilation 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Engineering and Related Design 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 5  Level TBA: Pre-2009 was L5  6 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Registered" 		 2001-06-13  2004-06-13  SAQA 0836/01 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2005-06-13   2008-06-13  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
Demonstrate knowledge of air filtration systems as used in air-conditioning and ventilation systems. 

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
  • ABET level 4 mathematics.
  • Interpret air-conditioning and ventilation plant layout drawings.
  • Writing reports. 
    		•

    UNIT STANDARD RANGE 
    Air filtration for domestic, commercial and industrial air-conditioning applications. 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Explain capabilities of filters to capture particulate in terms of arrestance, efficiency and count. 
    OUTCOME NOTES 
    Explain the capabilities of filters to capture particulate in terms of arrestance, efficiency and count. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The difference between arrestance and efficiency is explained. 

    ASSESSMENT CRITERION 2 
    2. The size and general mass of particulate caught by filters graded in terms of arrestance is correctly given. 

    ASSESSMENT CRITERION 3 
    3. The size and general mass of particulate caught by filters graded in terms of efficiency is correctly given. 

    ASSESSMENT CRITERION 4 
    4. The size and general mass of particulate caught by filters graded in terms of count is correctly given. 

    ASSESSMENT CRITERION 5 
    5. Demonstrate, with the aid of a diagram and mathematical model, how filter material of a particular design may be graded in terms of arrestance, efficiency and count. 

    ASSESSMENT CRITERION 6 
    6. The effect of dust holding capacity on filter life is explained. 

    SPECIFIC OUTCOME 2 
    Describe features of filters designed for primary, secondary a and tertiary filtration use. 
    OUTCOME NOTES 
    Describe the distinguishing features or characteristics of filters designed for primary, secondary and tertiary filtration use, and recommend typical applications for each. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The distinguishing features or characteristics given for each type of filter is in agreement with that published by ASHRAE. 

    ASSESSMENT CRITERION 2 
    2. Typical applications recommended for each type of filter is in agreement with common practice and with the filter's ability to remove sufficient particulate from the air stream, and still allow the air conditioner to operate normally. 

    SPECIFIC OUTCOME 3 
    Determine cost of filters projected over 2-year period, operating in identical conditions. 
    OUTCOME NOTES 
    Determine the cost of filters projected over a 2-year period, operating in identical conditions and designed for the same duty, from at least two, but no more than three, different manufacturers. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The price, specifications and test data of each manufacturer's product is brought to a common unit of measure, if different. 

    ASSESSMENT CRITERION 2 
    2. The calculated projected cost of filters (operated up to the lower of: their recommended pressure drop or the system's maximum allowable pressure drop) from each manufacturer for the 2-year period is used as the basis to compare costs. 

    SPECIFIC OUTCOME 4 
    Examine & assess condition of bank of filters, in terms of suitability of filters to produce results 
    OUTCOME NOTES 
    Examine and assess the condition of a bank of filters, in terms of the suitability of the filters to produce the required results and the amount of useful lifespan remaining. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The assessment report takes into account the type of air conditioner in use, the normally expected duty of the filters for that air conditioner and the ability of each element to remove sufficient particulate to enable the air conditioner and the filter bank as a whole to function economically. 

    ASSESSMENT CRITERION 2 
    2. The amount of useful lifespan remaining is provable using data and relevant measurements. 

    SPECIFIC OUTCOME 5 
    Determine the type and number of filters required in a filter bank from information given. 
    OUTCOME NOTES 
    Determine the type and number of filters required in a filter bank from information given about the air quantity and quality entering and required to leave the filters and the required lifespan. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The rated face velocity for the filters is not exceeded. 

    ASSESSMENT CRITERION 2 
    2. The lifespan calculated from the available data matches the requirements and is provable. 

    ASSESSMENT CRITERION 3 
    3. The quality and quantity of air delivered matches the requirements for the life of the filters. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
    Any person wishing to be assessed against this unit standard may apply to an assessment agency, assessor or provider institution accredited by the relevant ETQA, who may appoint a moderator to be present at the assessment.

    The assessor must have knowledge and experience of air-conditioning or refrigeration. 

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
  • The mechanics of air filtration; how filters are tested and rated; the effects on the air quality and on the air-conditioning system of inappropriate, faulty or poorly maintained air filters.
  • The importance of air filtration for the protection of human beings and equipment. 
    		•


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems
  • Determine filtration requirements
  • Selecting the correct filters 
    		•

    UNIT STANDARD CCFO ORGANISING 
    Organize and manage myself and my activities
  • Using correct selection and calculation procedures 
    		•

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information
  • Reading and interpreting manufacturers information 
    		•

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively
  • Writing a report 
    		•

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically
  • Interpreting manufacturer`s information and using it correctly 
    		•

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems
  • Understanding the effect of dust in the air on health 
    		•

    UNIT STANDARD NOTES 
    Catalogues from various filter manufacturers shall be available during assessment. 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Elective  20722   National Diploma: Air Conditioning, Refrigeration and Ventilation  Level 5  Level TBA: Pre-2009 was L5  Passed the End Date -
    Status was "Registered"     		 2004-06-13  MERSETA 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.