Air Handling Units
Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
Showing changes from Rev 6
to Rev 7
in Air Handling Units.
---
title: Air Handling Units
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### Fan arrays (multiple smaller fans in parallel) provide redundancy and reduced sound levels compared to a single large fan. {note}
+### The supply fan configuration for each air handling unit shall be specified, weighing redundancy and sound level against a fan array where one is being considered.
+
```datasheet
label: Fan Configuration
…9 unchanged lines
default: "Plenum fan (plug fan) — direct drive"
```
+### Whether a return or relief fan is provided for each air handling unit, and its configuration, shall be specified.
+
```datasheet
label: Return/Relief Fan
…1236 unchanged lines
### Filter section doors shall include a filter installation date tag holder for recording the date of each filter change.