This is the second edition of CSA P.4.1, Testing method for measuring annual fireplace efficiency. It supersedes the previous edition, published in 2002.
The purpose of this Standard is to provide a method for measuring annual fireplace efficiency.
This Standard applies to vented gas fireplaces approved to ANSI Z21.50/CSA 2.22 and to vented gas fireplace heaters approved to ANSI Z21.88/CSA 2.33 that use natural gas or propane.
This Standard does not apply to decorative fireplaces certified to ANSI Z21.60/CSA 2.26.
This Standard includes
(a) a test method for cyclic and part-load performance;
(b) methods for interpolating and extrapolating test data; and
(c) calculation procedures for establishing seasonal performance.
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.
The values given in SI (metric) units are the standard. The values given in parentheses are for information only but are exact.