Draft Details

Review start date:Apr 28, 2022
Review end date:Jun 27, 2022
Contact email:kelly.yaremko(at)csagroup.org
Draft Scope/Description:


This Standard describes the methods for determining the level of depressurization and solutions to mitigate risk arising from depressurization.


This Standard applies to all existing single-family dwelling units contained in detached, semi-detached, and row houses equipped with an exhaust device, which have

a) a combustion device within the house; or

b) an attached garage.


This Standard does not provide depressurization level assessment methods or solutions for

a) the infiltration of soil gas such as radon;

b) the presence of volatile organic compound (VOC) emissions from building materials or contents;

c) the presence of mold in houses; or

d) the presence of pollutants from other sources, such as stored chemical products.


The requirements of this Standard are expressed in SI (metric) units.


In CSA Standards, shall is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; should is used to express a recommendation or that which is advised but not required; may is used to express an option or that which is permissible within the limits of the standard; and can is used to express possibility or capability.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

You may comment on any section of this document by clicking the “Submit Comment” link at the bottom of the relevant section.