What is BS EN 1749 about?
BS EN 1749 covers gas appliances. BS EN 1749 gives details for the classification of gas appliances according to the method of supplying combustion air. BS EN 1749 also details the evacuation of the combustion products (types). This classification refers to gas appliances that are intended to be installed within buildings and/or outside the building. BS EN 1749 classifies appliances as type A, B or C according to the basic principle for the evacuation of the combustion products and air inlet. BS EN 1749 is the reference for the harmonization of product standards, for the preparation of installation standards and for the common understanding of the types of gas appliances.
Note: BS EN 1749 is neither an installation standard nor a product standard.
Who is BS EN 1749 for?
BS EN 1749 on the classification of gas appliances is useful for:
- Refineries
- Gas suppliers
- Gas appliance manufacturers
- Builders
- Contractors
- Estate Managers
Why should you use BS EN 1749?
The classification of gas appliances helps you to understand the hazard and safety conditions of multiple gas appliances. BS EN 1749 gives you the details of a general scheme for the classification of such appliances according to the method of air supply and evacuating the combustion products.
BS EN 1749 concerns gas appliances that are intended to be installed within buildings or outside buildings. This appliance classification scheme could be utilized in other circumstances. For example, in the case of appliances capable of utilizing other fuels. Using BS EN 1749 you will be able to promote harmonization in the classification of appliance types. Classifying gas appliances makes for smooth operations for the user.
What’s changed since the last update?
BS EN 1749:2020 supersedes PD CEN/TR 1749:2014, which is withdrawn. BS EN 1749:2020 includes some technical changes with respect to PD CEN/TR 1749:2014. These include:
- Editorial changes, a reviewed wording and a reviewed structure compared to the TR version (CEN/TR 1749:2014)
- Some technical items generally described in the foreword of the former TR are now included in the scope or in other clauses of the standard
- A clause on normative references (Clause 2) and on terms and definitions (Clause 3) has been included
- A key for figures has been added and some figures have been modified, according to the key adopted (Annex A)
- Annex B has a wider application than Germany. Due to this change, the former Annex D has been deleted
