[Equest-users] G.3.1.2.8 Design Air Flow

[Robby Oylear]

The delta T G.3.1.2.8 is referring to a 20 degree delta between room
cooling setpoint and supply air temperature.  For example:



Room Cooling Setpoint =        75 °F

20 °F delta from G.3.1.2.8  = -20 °F

Supply Air Temperature =      55 °F



A 20 degree fan delta T would be a MONSTER of a fan..



Robby Oylear, LEED® AP

Mechanical Engineer

direct: 206.788.4571

cell: 206.354.2721

www. <http://www.rushingco.com/> rushingco.com



From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Chan,
Walter
Sent: Thursday, September 17, 2009 2:50 PM
To: Equest-users at lists.onebuilding.org
Subject: [Equest-users] G.3.1.2.8 Design Air Flow



When I use delta T 20F for supply fan, the CFM stays the same and the
cooling load is up 60% and heating load is slightly lower.  Any clue?



Is there a correct way to put in the Delta T 20F (after I set default and
not using fan static pressure) and eQuest will calculate the correct CFM?



Thanks for the help.




Walter W. Chan, P.E., LEED AP



CAS Group

1341 North Delaware Ave., Suite 500 | Philadelphia, PA 19125

T: 215.427.8711 |  F: 215.427.8710



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