scope:

This Standard specifies the test method for the performance of airtightness of a building mainly used as a residence and part of a building by inducing an indoor-outdoor pressure difference using a fan.

NOTE 1 In this Standard, a residence refers to a single-family house, apartment house, row house, etc.

NOTE 2 An inside-outside building pressure difference can be induced by pressurizing or depressurizing inside the building, which are called the pressurization method and the depressurization method, respectively.

NOTE 3 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 9972 : 2015 Thermal performance of buildings-Determination of air permeability of buildings-Fan pressurization method (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.