This European Standard specifies methods to be used for laboratory testing of air-to-air heat
recovery devices or those recovering heat from flue gases of heating appliances in buildings
(except process-process applications) to obtain rating data . It gives test requirements and
procedures for performing such tests and specifies input criteria required for tests to verify
performance data given by the manufacturer.
For the purposes of this standard, the tenn exhaust air may also be taken to mean the
products of combustion.
This European Standard is intended to be used as a basis for testing heat recovery devices
for HVAC-systems, which as specified in prEN 247 consist of the heat exchanger itself
installed in a casing having the necessary air duct connecting elements and in some cases the
fans and Pumps, but without any additional components of the HVAC-system.
This European Standard is applicable to the following categories of heat exchangers:
Category I Recuperators
Category I1 With intermediary heat transfer medium
Category IIa - without phase-change
Category IIb - with phase-change (heat pipe,. .)
Category 111 Regenerators (containing accumulating mass)
Category I1 la - non hygroscopic
Category IIlb - hygroscopic
Heat recovery devices with exchangers and intermediary heat transfer medium without phasechange
(category IIa) are to be tested as one unit including pump and pipe system between
the coils.
Für Wärmeaustauscher sind für die Leistungskriterien von Wärmerückgewinnungseinrichtungen die Prüfbedingungen beschrieben. Jene Daten, die in einem Prüfbericht enthalten sein müssen, sind angeführt. In Bildern ist die Prüfanordnung dargestellt. Diese ENV 308 ist Teil einer Reihe von europäischen Vornormen auf dem Gebiet der Wärmeaustauscher, z. B. ENV 247, ENV 305, ENV 306, ENV 307 und ENV 327, die bereits erschienen sind.