ERV means energy recovery
ventilator which is a new generation system that built in Enthalpy exchanger(normally made by paper),
ERV system has same like function of HRV and at the same time it can recover latent heat(humidity) from stale air as well.
Since we can add these equations up to get C2H5OH + 3O2 → 2CO2 + 3H2O,
the reaction we're trying to find the Enthalpy for, we can simply add up the enthalpies of the formation
reactions above to find the Enthalpy of this reaction as follows:.