[Hap-users] Constant Air Flow

Brendan Arnold BrendanA at MKE-Inc.com
Tue Mar 16 09:57:55 PDT 2010

You can specify a constant volume system under your "general" tap. Make sure if you are using chilled water select "Chilled Water Air Handling Units" under Equipment Type. Then select CAV single zone or terminal reheat (dependant on your situation) in the Air System Type.   Under the "sizing data" tap you can select "user define", then specify your supply air and ventilation CFM's.

In order to determine cost for heating and cooling water you will need to construct a building to be simulated.  Thus you will need to create a chiller and boiler plant and specify all pump requirements.  Then implement these into your building.


From: hap-users-bounces at lists.onebuilding.org [mailto:hap-users-bounces at lists.onebuilding.org] On Behalf Of Kimball, Matthew
Sent: Tuesday, March 16, 2010 9:12 AM
To: hap-users at lists.onebuilding.org
Subject: [Hap-users] Constant Air Flow

Is there a way to force HAP to supply a constant air flow through a "system"  (this includes specifying return air and outside air requirements) and calculate the cost of providing the cooling and heating water to the "system" and "zone" reheats?  Any explanations would be helpful.


[cid:379144116 at 16032010-2CA3]

Matthew Kimball
**LEED Green Associate
Piping Designer II
Jacobs Engineering Raleigh
110 Corning Rd. Suite 2500
Cary, NC  27518
919-859-5019 office
574-265-3193 cell
919-859-5151 fax

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