{"id":522832,"date":"2024-11-05T15:09:55","date_gmt":"2024-11-05T15:09:55","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/csa-ansi-z21-9120\/"},"modified":"2024-11-05T15:09:55","modified_gmt":"2024-11-05T15:09:55","slug":"csa-ansi-z21-9120","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/csa\/csa-ansi-z21-9120\/","title":{"rendered":"CSA\/ANSI Z21.91:20"},"content":{"rendered":"

Preface<\/strong><\/p>\n

<\/p>\n

This is the fourth edition of CSA\/ANSI Z21.91, Ventless firebox enclosures for gas-fired unvented gas log type room heaters. It supersedes the previous editions published in 2017, 2007, and 2001.<\/p>\n

<\/p>\n

Scope<\/strong><\/p>\n

<\/p>\n

1.1<\/p>\n

This Standard applies to newly produced ventless firebox enclosures (see Clause 3, Definitions), herein after referred to as fireboxes, for unvented gas log type room heaters.<\/p>\n

<\/p>\n

1.2<\/p>\n

Fireboxes covered by this Standard are intended for use with unvented room heaters that comply with ANSI Z21.11.2 for installation in solid fuel-burning fireplaces.<\/p>\n

<\/p>\n

1.3<\/p>\n

If a value for measurement as given in this Standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification.<\/p>\n

<\/p>\n

1.4<\/p>\n

All references to psi throughout this Standard are to be considered gauge pressures, unless otherwise specified.<\/p>\n

<\/p>\n

1.5<\/p>\n

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.<\/p>\n

<\/p>\n

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.<\/p>\n

<\/p>\n

Notes to tables and figures are considered part of the table or figure and may be written as requirements.<\/p>\n

<\/p>\n

Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application.<\/p>\n","protected":false},"excerpt":{"rendered":"

Ventless firebox enclosures for gas-fired unvented gas log type room heaters<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
CSA<\/b><\/a><\/td>\n2020-02-01<\/td>\n58<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":522838,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2674],"product_tag":[],"class_list":{"0":"post-522832","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-csa","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/522832","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/522838"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=522832"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=522832"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=522832"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}