This document serves to formally identify and authorize specific models of fireplaces that are exempt from the smoke control regulations established under the Clean Air Act. The Ministry of Housing and Local Government issued this order to provide legal clarity for homeowners and manufacturers regarding which combustion appliances comply with air quality standards in designated smoke control areas. By codifying these exemptions, the government sought to balance the necessity of reducing urban air pollution with the practical requirements of residential heating.

Legal professionals and historians of environmental policy view this document as a technical administrative record rather than a narrative text. It is primarily utilized by researchers tracking the evolution of British air quality legislation and the regulatory history of domestic heating appliances.