ISO 9972:2015
Thermal performance of buildings — Determination of air permeability of buildings — Fan pressurization method
ISO 9972:2015 is intended for the measurement of the air permeability of buildings or parts of buildings in the field. It specifies the use of mechanical pressurization or depressurization of a building or part of a building. It describes the measurement of the resulting air flow rates over a range of indoor-outdoor static pressure differences.
ISO 9972:2015 is intended for the measurement of the air leakage of building envelopes of single-zone buildings. For the purpose of this International Standard, many multi-zone buildings can be treated as single-zone buildings by opening interior doors or by inducing equal pressures in adjacent zones.
ISO 9972:2015 does not address evaluation of air permeability of individual components.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, and symbols
3.1 Terms and definitions
3.2 Symbols
4 Apparatus
4.1 General
4.2 Equipment
4.2.1 Air-moving equipment
4.2.2 Pressure-measuring device
4.2.3 Air flow rate measuring system
4.2.4 Temperature-measuring device
5 Measurement procedure
5.1 Measurement conditions
5.1.1 General
5.1.2 Measured extent
5.1.3 Time of measurement
5.2 Preparation
5.2.1 Building preparation methods
5.2.2 Heating, ventilation and air conditioning systems and other building equipment
5.2.3 Intentional openings in the envelope
5.2.4 Openings inside the measured extent
5.2.5 Air-moving equipment
5.2.6 Pressure measuring devices
5.3 Steps of the procedure
5.3.1 Preliminary check
5.3.2 Temperature and wind conditions
5.3.3 Zero-flow pressure difference
5.3.4 Pressure difference sequence
6 Expression of results
6.1 Reference values
6.1.1 Internal volume
6.1.2 Envelope area
6.1.3 Net floor area
6.2 Calculation of the air leakage rate
6.3 Derived quantities
6.3.1 General
6.3.2 Air change rate at reference pressure difference
6.3.3 Specific leakage rate (envelope)
6.3.4 Specific leakage rate (floor)
6.3.5 Effective leakage area
6.3.6 Specific effective leakage area (envelope)
6.3.7 Specific effective leakage area (floor)
7 Test report
8 Uncertainty
8.1 General
8.2 Reference value
8.3 Overall uncertainty
Annex A (informative) Description of equipment used to pressurize buildings
Annex B (informative) Dependence of air density on temperature, dew point,and barometric pressure
Annex C (informative) Recommended procedure for estimating uncertaintyin derived quantities
Annex D (informative) Beaufort scale of wind (extract)
Annex E (informative) Detection of the leakage location
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, and symbols
3.1 Terms and definitions
3.2 Symbols
4 Apparatus
4.1 General
4.2 Equipment
4.2.1 Air-moving equipment
4.2.2 Pressure-measuring device
4.2.3 Air flow rate measuring system
4.2.4 Temperature-measuring device
5 Measurement procedure
5.1 Measurement conditions
5.1.1 General
5.1.2 Measured extent
5.1.3 Time of measurement
5.2 Preparation
5.2.1 Building preparation methods
5.2.2 Heating, ventilation and air conditioning systems and other building equipment
5.2.3 Intentional openings in the envelope
5.2.4 Openings inside the measured extent
5.2.5 Air-moving equipment
5.2.6 Pressure measuring devices
5.3 Steps of the procedure
5.3.1 Preliminary check
5.3.2 Temperature and wind conditions
5.3.3 Zero-flow pressure difference
5.3.4 Pressure difference sequence
6 Expression of results
6.1 Reference values
6.1.1 Internal volume
6.1.2 Envelope area
6.1.3 Net floor area
6.2 Calculation of the air leakage rate
6.3 Derived quantities
6.3.1 General
6.3.2 Air change rate at reference pressure difference
6.3.3 Specific leakage rate (envelope)
6.3.4 Specific leakage rate (floor)
6.3.5 Effective leakage area
6.3.6 Specific effective leakage area (envelope)
6.3.7 Specific effective leakage area (floor)
7 Test report
8 Uncertainty
8.1 General
8.2 Reference value
8.3 Overall uncertainty
Annex A (informative) Description of equipment used to pressurize buildings
Annex B (informative) Dependence of air density on temperature, dew point,and barometric pressure
Annex C (informative) Recommended procedure for estimating uncertaintyin derived quantities
Annex D (informative) Beaufort scale of wind (extract)
Annex E (informative) Detection of the leakage location