CSA C750:25

Preface This is the first edition of CSA C750, Airflow and static pressure measurements in residential ductwork systems . CSA Group acknowledges that the development of this Standard was made possible, in part, by the financial support of Natural Resources Canada, BC Hydro, and the British Columbia Ministry of Energy and Climate Solutions. This Standard was prepared by the Subcommittee on Duct Airflow Measurement, under the jurisdiction of the Technical Committee on Heating, Ventilation, Air Conditioning and Refrigeration and the Strategic Steering Committee on Performance, Energy Efficiency and Renewables, and has been formally approved by the Technical Committee. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. Scope 1.1 General This Standard provides procedural requirements for airflow and static pressure measurements in residential ductwork systems. It also includes calculations for extrapolating static pressure for different airflows based on measured data. Note: For residential ventilation ductwork systems, refer to CSA F326. 1.2 Inclusions This Standard applies to ductwork systems installed in housing and small buildings. Note: In this Standard, housing and small buildings are as defined in Part 9 of the National Building Code of Canada. 1.3 Exclusions This Standard does not provide calculations for specifying the maximum airflow capacity of a ductwork system. It is the sole responsibility of a system designer to interpret the results of the calculations in this Standard. This Standard does not encompass equipment commissioning beyond the technical procedures for the measurement of airflow and static pressure. This Standard does not provide detailed device-specific instructions for different brands of equipment. 1.4 Terminology In this Standard, "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; and "may" is used to express an option or that which is permissible within the limits of the Standard. 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. 1.5 Units of measurement The values given in metric units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.