{"id":262509,"date":"2024-10-19T17:25:11","date_gmt":"2024-10-19T17:25:11","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-7977-12009a12013\/"},"modified":"2024-10-25T13:15:37","modified_gmt":"2024-10-25T13:15:37","slug":"bs-7977-12009a12013","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-7977-12009a12013\/","title":{"rendered":"BS 7977-1:2009+A1:2013"},"content":{"rendered":"

This standard specifies the requirements and methods of test for the construction, safety, rational use of energy, classification and marking of 2nd and 3rd family gas-fired domestic radiant convector heating appliances not exceeding a nominal heat input of 15kW based on the net calorific value and which incorporate a natural draught burner.<\/p>\n

This standard applies to open-flued independent radiant\/convector gas fires not connected directly or by means of an adapter to an open flue. The appliance and flue are separated by a void which can be in one or more of the following forms:<\/p>\n