BS EN 13384-1:2015+A1:2019

What is BS EN 13384-1 - thermal and fluid dynamic calculations for chimneys about?  

BS EN 13384-1 is the first part of the EN 13384 multi-series that discusses thermal and fluid dynamic calculation methods for chimneys. 

BS EN 13384-1 specifies methods for the calculation of the thermal and fluid dynamic characteristics of chimneys serving one combustion appliance. The methods in BS EN 13384-1 are applicable to negative or positive pressure chimneys with wet or dry operating conditions. It is valid for chimneys with combustion appliances for fuels subject to the knowledge of the flue gas characteristics which are needed for the calculation. 

The methods in BS EN 13384-1 are applicable to chimneys with one inlet connected with one appliance. 

Who is BS EN 13384-1- thermal and fluid dynamic calculations for chimneys for? 

BS EN 13384-1 on thermal and fluid dynamic calculations for chimneys is useful for: 

• Kitchen appliance manufacturers 
• Architects 
• Chimney installers and maintenance personnel 
• Testing laboratories 

Why should you use BS EN 13384-1- thermal and fluid dynamic calculations for chimneys?  

Negative air pressure in chimneys occurs when the air pressure inside the house is less than the air pressure outdoors. In such cases when you light up the fireplace or gas stove beneath the chimney it may push the smoke back inside the building. These negative and positive pressure also affect the performance of the combustion source. 

BS EN 13384-1 guides you through the process of calculating thermal and fluid dynamics in chimneys serving a single appliance. BS EN 13384-1 helps you understand the concept of airflow and its importance in chimney performance. 

The calculation formulas and guidance given in BS EN 13384-1 enable you to install or build chimneys that are more resilient to airflow and air pressure and thereby enhance their build quality.  

What’s changed since the last update? 

BS EN 13384-1:2015+A1:2019 supersedes EN 13384-1:2015. The main changes in BS EN 13384-1:2015+A1:2019 compared to EN 13384-1:2015 are as follows: 

• Mistakes in formulas have been corrected 
• For wood the rise of the dew point to take into account the acid condensation has been deleted 
• Table for material characteristics in Table B.5 has been adapted to EN 15287-1 and supplemented by radiation coefficients 
• In Calculation of thermal resistance according to Annex A are linked to the method of EN 15287-1 for taking into account the temperature dependence has been added; 
• For non-concentric ducts the calculation of the mean temperature of the air supply has been amended