Introduction
1 Scope
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 air flow
4.8 Reference conditions
4.9 Pressure
5 General requirements
5.1 Heat recovery device
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 and accuracy requirements
6.1 External leakage test
6.2 Internal exhaust leakage test (categories 1 and IIa)
6.3 Carry-over test (category III)
6.4 Ratio tests (see figure 3)
6.5 Pressure drop tests (see figure 3)
6.6 Heat balance
7 Test report
7.1 Heat recovery device
7.2 External leakage
7.3 Internal exhaust air leakage
7.4 Carry-over
7.5 Temperature and humidity ratios
7.6 Pressure drop: for standard air
7.7 Other indications