[Equest-users] Interlock combustion air fan with boiler schedule

Shawn Maurer maurer.shawn at gmail.com
Fri Jan 10 05:58:33 PST 2014

Hello eQuest community

I’ve been using eQuest on a basic to moderate level for a while, and am
starting to get into more detailed modeling.

What I have now is a building with boilers in a basement that get fresh air
from a 100% OA supply fan.  The fan is interlocked with the boilers so that
it only supplies air when the boilers are burning fuel.  The fan also has a
hot water coil to keep the air at a minimum temperature to prevent thermal
shock of the boilers.

I’m pretty sure I’ve got the heating figured out, but how do I link the fan
schedule to the boiler operation schedule?

An answer to this will definitely help in figuring out interlocking other
equipment in eQuest

Thank you all for your help!


Shawn Maurer, EIT
Building Energy Specialist
University of Illinois - Urbana Champaign
Smart Energy Design Assistance Center
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