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Add exhaust fan for AirLoopHVAC:DedicatedOutdoorAirSystem #11395

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Merged
mitchute merged 8 commits into from
Jan 24, 2026
Merged

Add exhaust fan for AirLoopHVAC:DedicatedOutdoorAirSystem #11395

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2bc5803
Add exhaust fan for AirLoopHVAC:DedicatedOutdoorAirSystem
rraustad Jan 14, 2026
fcd755b
Merge branch 'develop' of https://github.com/NREL/EnergyPlus into 102…
rraustad Jan 14, 2026
cae2be0
Clang format
rraustad Jan 14, 2026
296c3fb
Merge branch 'develop' into 10280-DOAS-Return-Fan
mitchute Jan 15, 2026
1e18a76
Add new example file with DOAS exhaust fan
rraustad Jan 15, 2026
eb4fc88
Merge branch 'develop' of https://github.com/NREL/EnergyPlus into 102…
rraustad Jan 15, 2026
1d2f13d
Merge branch '10280-DOAS-Return-Fan' of github.com:NREL/EnergyPlus in…
mitchute Jan 23, 2026
3a5878b
Merge branch 'develop' into 10280-DOAS-Return-Fan
mitchute Jan 23, 2026
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2 changes: 1 addition & 1 deletion doc/input-output-reference/src/overview/group-air-path.tex
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Expand Up @@ -408,7 +408,7 @@ \subsubsection{Inputs}

\subsection{AirLoopHVAC:DedicatedOutdoorAirSystem}\label{airloophvacdedicatedoutdoorairsystem}

The AirLoopHVAC:DedicatedOutdoorAirSystem is a central dedicated outdoor air system (DOAS) and delivers outdoor air to multiple \hyperref[airloophvac]{AirLoopHVAC} systems. The amount of delivered outdoor air is based on a sum of outdoor air flow rates from outdoor air stream nodes defined in the \hyperref[outdoorairmixer]{OutdoorAir:Mixer}. These OutdoorAir:Mixer objects are a component of served multiple AirLoopHVAC systems. The central DOAS system also pretreats outdoor air before outdoor air distribution into multiple AirLoopHVAC, with given precool and preheat air conditions.
The AirLoopHVAC:DedicatedOutdoorAirSystem is a central dedicated outdoor air system (DOAS) and delivers outdoor air to multiple \hyperref[airloophvac]{AirLoopHVAC} systems. The amount of delivered outdoor air is based on a sum of outdoor air flow rates from outdoor air stream nodes defined in the \hyperref[outdoorairmixer]{OutdoorAir:Mixer}. These OutdoorAir:Mixer objects are a component of the multiple AirLoopHVAC systems connected to the central DOAS. The central DOAS system also pretreats outdoor air before outdoor air distribution into multiple AirLoopHVAC, with given precool and preheat air conditions. The DOAS system may have a draw thorugh or blow through fan (i.e., before or after the non-fan components) and could include an exhaust fan as the last object in the DOAS system's AirLoopHVAC:OutdoorAirSystem equipment list object (ref. AirLoopHVAC:OutdoorAirSystem:EquipmentList). The exhaust fan inlet node name will be the same node name as the DOAS system's AirLoopHVAC:Mixer's outlet node name.

After the object name, the object has four fields to provide the name of AirLoopHVAC:OutdoorAirSystem, system availability, and names of AirLoopHVAC:Mixer and AirLoopHVAC:Splitter. The AirLoopHVAC:OutdoorAirSystem lists a controller to perform controls, and coils and fans to pretreat outdoor air before delivery to served AirLoopHVAC. The Availability Schedule determines times when a system is operational or shutdown. The AirLoopHVAC:Mixer and AirLoopHVAC:Splitter provide connection into distribution and relief nodes, respectively.

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