ENV 308 : 1991

0 Introduction
1 Object and field application
2 Normative references
3 Symbols and subscripts
4 Definitions
4.1 Heat recovery device
4.2 Mass flows
4.3 Ratios
4.4 External leakage
4.5 Internal leakage
4.6 Internal exhaust air leakage
4.7 Carry over
4.8 Reference conditions
4.9 Pressures
5 General requirements
5.1 Equipment installation
5.2 External leakage
5.3 Internal exhaust air leakage
5.4 Carry-over
5.5 Temperature and humidity ratios
5.6 Pressure drop
6 Test procedures
6.1 External leakage test
6.2 Internal leakage test
6.3 Carry-over test
6.4 Ratio tests
6.5 Pressure drop tests
6.6 Heat balance
7 Test report
7.1 Heat recovery device
7.2 External leakage
7.3 Internal leakage
7.4 Carry-over
7.5 Temperature and humidity ratios
7.6 Pressure drop
7.7 Other indications

Gives procedures 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, to obtain rating data. It gives test requirements and procedures for performing tests and specifies input criteria required for tests to verify performance data given by the manufacturer.