We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
  • BS 4856-5(1979) : 1979

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
    Add to Watchlist
    This Standard has been added successfully to your Watchlist.
    Please visit My Watchlist to see all standards that you are watching.
    Please log in or to add this standard to your Watchlist.
    We could not add this standard to your Watchlist.
    Please retry or contact support for assistance.
    You need to be logged in to add this standard to your Watchlist.
    Please log in now or create an account to add.
    You already added this Product in the Watchlist.

    METHODS FOR TESTING AND RATING FAN COIL UNITS UNIT HEATERS AND UNIT COOLERS - ACOUSTIC PERFORMANCE WITH DUCTING

    Available format(s):  Hardcopy, PDF

    Superseded date:  15-09-1997

    Language(s):  English

    Published date:  01-01-1979

    Publisher:  British Standards Institution

    Add to Watchlist

    Add To Cart

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

    Foreword
    Cooperating organizations
    Methods
    Section one. General
    1 Scope
    2 References
    3 Definitions
    4 Nomenclature
    5 Instrumentation
    6 Test procedure
    7 Reporting of test results
    8 Presentation of test results
    9 Rating
    10 Example of test results
    Section two. Test methods
    11 General
    12 Application
    13 Precision
    14 Instrumentation
    15 Installation
    16 Quantities to be measured
    17 Discrete frequency components
    18 Method of measurement
    19 Determination of sound power level
    20 Background noise
    Appendix
    A ISO standards and draft ISO standards
    Tables
    1 Range of accuracy in determining sound power levels
        of broad-band sources in reverberation rooms
    2 Bandwidths
    3 Differences for significant frequency components
    4 Number of microphone stations
    5 Standard deviations
    6 Requirements for traverse path
    7 Correction requirements for background noise
    Figures
    1 Arrangements of equipment for measurement of outlet
        noise on units with either free air inlet or ducted
        inlet
    2 Arrangements of equipment for measuring inlet and
        casing noise from units with either free air inlet
        or ducted inlet
    3 Casing radiation test, inlet and outlet ducted
    4 End reflection correction diagram
    5 Example of typical reference sound source

    Abstract - (Show below) - (Hide below)

    Describes methods of testing for sound power emission resulting from air moving parts of fan coil units, unit heaters and unit coolers when used with ducting. Covers definitions, nomenclature, instrumentation, test procedure, reporting of test results, presentation of test results, rating, example of test results, application, precision, installation, quantities to be measured, discrete frequency components, method of measurement, determination of sound power level and background noise. There are several tables and figures.

    General Product Information - (Show below) - (Hide below)

    Committee RHE/6
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS 7258-1(1990) : 1990 LABORATORY FUME CUPBOARDS - SPECIFICATION FOR SAFETY AND PERFORMANCE
    BS 7258-1(1994) : 1994 LABORATORY FUME CUPBOARDS - SPECIFICATION FOR SAFETY AND PERFORMANCE

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

    ISO 2204:1979 Acoustics Guide to International Standards on the measurement of airborne acoustical noise and evaluation of its effects on human beings
    BS 848-1(1980) : 1980 FANS FOR GENERAL PURPOSES - METHODS OF TESTING PERFORMANCE
    BS 4856-3(1975) : 1975 METHODS FOR TESTING AND RATING FAN COIL UNITS UNIT HEATERS AND UNIT COOLERS - THERMAL AND VOLUMETRIC PERFORMANCE FOR HEATING AND COOLING DUTIES WITH ADDITIONAL DUCTING
    BS 848-2(1985) : 1985 FANS FOR GENERAL PURPOSES - METHODS OF NOISE TESTING
    • Access your standards online with a subscription

      Features

      • Simple online access to standards, technical information and regulations
      • Critical updates of standards and customisable alerts and notifications
      • Multi - user online standards collection: secure, flexibile and cost effective