[EN 13141-7:2021, 3.16]:difference of vapour mixing ratio between inlet and outlet of one of the air flows divided by the difference of vapour mixing ratio between the inlets of both air flows.Note: vapour mixing ratio is the absolute humidity.

[EN 12792:2003, 24]:   relative airin humid air, the ratio expressed as a percentage of the water vapour’s actual pressure to the saturated vapour pressure at the same dry bulb temperature. [ISO 16814:2008, 3.34]:mass of water vapour in the air by … Continue reading →

(See ventilation, hybrid)