Standards Development

Scope

This part of EN 13384 specifies methods for calculation of the thermal and fluid dynamic characteristics of chimneys serving more than one !combustion" appliance.

This part of EN 13384 covers both the cases, either

a) where the chimney is connected with more than one connecting flue pipe from individual or several appliances in a multiinlet arrangement; or

b) where the chimney is connected with an individual connecting flue pipe connecting more than one appliance in a cascade arrangement.

The case of multiple inlet cascade arrangement is covered by the case a).

This part of EN 13384 deals with chimneys operating under negative pressure conditions (there can be positive pressure condition in the connecting flue pipe) and with chimneys operating under positive pressure conditions and is valid for chimneys serving !combustion" appliances for liquid, gaseous and solid fuels.

This part of EN 13384 does not apply to:

— chimneys with different thermal resistance or different cross-section in the various chimney segments. This part does not apply to calculate energy gain;

— chimneys with open fire places, e.g. open fire chimneys or chimney inlets which are normally intended to operate open to the room;

— chimneys which serve different kinds of !combustion" appliances regarding natural draught, fan assisted, forced draught or combustion engine. Fan assisted appliances with draught diverter between the fan and the chimney are considered as natural draught appliances;

— chimneys with multiple inlets from more than 5 storeys. (This does not apply to balanced flue chimney.);

— chimneys serving !combustion" appliances with open air supply through ventilation openings or air ducts, which are not installed in the same air supply pressure region (e.g. same side of building). For positive pressure chimneys this part only applies if any !combustion" appliance which is out of action can be positively isolated to prevent flue gas back flow. 

Purpose

The members of NA 005-11-39 AA „Mirror committee to CEN/TC 166, CEN/TC 166/WG 1 and WG 2“request the revision of the standard series EN 13384 with the following justification:

_ Incorporation of the results/insights from testing done by CEN/TC 109 Ad-hoc Group (comparison of testing vs. calculation for improvement of EN 13384);

_ consideration of DIN 18160-1, Annex N;

_ Revision of the temperature conditions.