[Equest-users] System multiplier
Haddad, Kamel
Kamel.Haddad at NRCan-RNCan.gc.ca
Fri Feb 26 07:07:56 PST 2010
Vikram,
When you use a sizing ratio of 2, you're oversizing the system by 100%
while the loads stay at 1/2 of what they should be. This is not what you
want.
Depending on the system type, using a single unit with 52,000 cfm can
affect the results because of the different load diversity.
Kamel Haddad
________________________________
From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Vikram
Sami
Sent: February 24, 2010 17:22
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] System multiplier
I'm modeling a building with multiple zones per floor. Each floor is
supplied by two identical air handlers supplying 26,000 cfm each. I
would like to model it as a single system. Should I:
1. Model a single AHU with 26,000 cfm and assign it a multiplier
of 2 (system sizing ratio)
2. Model a single AHU with 52,000 cfm without the sizing ratio
(sizing ratio 1).
3. Model both air handlers (would prefer not to).
Vikram Sami, LEED AP
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