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  • ASHRAE 120 : 2017

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    METHOD OF TESTING TO DETERMINE FLOW RESISTANCE OF HVAC DUCTS AND FITTINGS

    Available format(s):  Hardcopy, PDF

    Superseded date:  01-04-2022

    Language(s):  English

    Published date:  01-01-2017

    Publisher:  American Society of Heating, Refrigerating & Air Conditioning Engineers

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    Table of Contents - (Show below) - (Hide below)

    Foreword
    1 Purpose
    2 Scope
    3 Definitions, Symbols, and Subscripts
    4 Compliance Requirements
    5 Applicability
    6 Instrumentation
    7 Flow Measuring Systems and Test Setups
    8 Observations and Conduct of Test
    9 Calculations
    10 Test Results and Report
    11 References
    Informative Annex A - Time-Weighted Average
    Informative Annex B - Leakage Measurement
    Informative Annex C - Flexible Duct Test Setup Guide
    Informative Annex D - Example Test Systems

    Abstract - (Show below) - (Hide below)

    Provides uniform methods of laboratory testing of HVAC ducts and fittings to determine their resistance to airflow.

    Scope - (Show below) - (Hide below)

    .1 This standard may be used to determine the change in total pressure resulting from airflow in HVAC ducts and fittings. 2.2 The test results can be used to determine duct flow losses in pressure loss per unit length. Fitting losses are reported as local loss coefficients.2.3 This standard does not cover interpretation of test data.

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    Committee TC 5.2
    Document Type Standard
    Publisher American Society of Heating, Refrigerating & Air Conditioning Engineers
    Status Superseded
    Superseded By
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    ASHRAE 41.1 : 2013 STANDARD METHOD FOR TEMPERATURE MEASUREMENT
    ASHRAE 41.6 : 2014 METHOD FOR HUMIDITY MEASUREMENT
    AMCA 210 : 2016 LABORATORY METHODS OF TESTING FANS FOR CERTIFIED AERODYNAMIC PERFORMANCE RATING
    ASHRAE 41.3 : 2014 METHODS FOR PRESSURE MEASUREMENT
    ISO 5167-1:2003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General principles and requirements
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