Hi all,
we have a doubt about the system type to use for our project.
The mechanical ventilation is the following:
- outdoor air passes through two heat recovery systems;
- from heat recovery 1 the preheated air is addressed through two fan coils/cassette. Each fan coil mixes outdoor air and return air and serves one single space. Should these fan coils be considered as Single zone units or the Heat recovery system should be considered as Multiple zone unit?
- from heat recovery 2 the preheated air is addressed through two fan coils/cassette. One fan coil mixes outdoor air and return air and serves only one space. The second fan coil mixes outdoor air and return air and serves two different spaces (corridor and toilets). Should the fan coil that serves corridor and restrooms considered as Multiple zone unit?
Thanks!
Scott Adams
PrincipalSustainable Integration LLC
15 thumbs up
July 17, 2014 - 9:37 pm
Heat recovery units only transfer heat, they do not mix air streams. As the outdoor and recirculated air are mixed at the fan coil units then all but the last would be single zone. That is assuming that each space only contains a single ventilation zone. It is not that uncommon for a single space to have both multiple ventilation and thermal zones.