<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7638.1">
<TITLE>FW: [Equest-users] ASHRAE 90.1 - Few Questions</TITLE>
</HEAD>
<BODY>
<!-- Converted from text/plain format -->
<BR>
<BR>
<P><FONT SIZE=2>Dear all,<BR>
<BR>
<BR>
<BR>
I have a few questions regarding ASHRAE 90.1 compliance and I really<BR>
hope someone can answer me :-)<BR>
<BR>
My project is a school, and I'm using system 7 (VAV with reheat)<BR>
<BR>
<BR>
<BR>
1. "G3.1.2.4 Fan System Operation. Supply and return fans shall<BR>
operate continuously whenever spaces are occupied and shall be cycled to<BR>
meet heating and cooling loads during unoccupied hours."<BR>
<BR>
I understand that I should turn on the "Night Cycle" feature of the<BR>
fans. Is this enough?<BR>
<BR>
<BR>
<BR>
2. "G3.1.2.8 Design Air Flow Rates. System design supply air flow<BR>
rates for the baseline bldg design shall be used on a supply<BR>
air-to-room-air temperature difference of 20F"<BR>
<BR>
My interpretation is that if I have the set point temperature for a zone<BR>
to be 70F, I input the "Zone entering minimum supply temp" to 50F. Is<BR>
this correct? Does this mean that I should leave eQUEST to determine the<BR>
supply flow rates, and only enter the design supply flow rates in the<BR>
proposed scenario?<BR>
<BR>
<BR>
<BR>
3. "G3.1.3.11 Heat Rejection. "...The tower shall be controlled to<BR>
maintain a 70F leaving water temp where weather permits, floating up to<BR>
leaving water temperature at design conditions."<BR>
<BR>
Someone mentioned to me to go to the condenser water loop, controls tab,<BR>
and select Load Reset, with the Setpoint Temp 70F. Is this correct?<BR>
<BR>
<BR>
<BR>
4. "G3.1.3.12 Supply Air Temp. Reset. Supply air temp shall be<BR>
reset based on zone demand from the design temp difference to a 10F temp<BR>
difference under minimum load conditions.<BR>
<BR>
Can someone please explain how can I accomplish this?<BR>
<BR>
<BR>
<BR>
5. "VAV Minimum Flow Setpoints. Minimum volume setpoints for VAV<BR>
reheat boxes shall be 0.4cfm/ft2 of floor area served<BR>
<BR>
What do they mean by this? Where can I enter it?<BR>
<BR>
<BR>
<BR>
Thank you all for your continuous support! Without you I wouldn't have<BR>
reached this final stage of my project!<BR>
<BR>
<BR>
<BR>
Many thanks,<BR>
<BR>
Omar<BR>
<BR>
___________________________<BR>
<BR>
Omar Katanani<BR>
Sustainable Design Engineer<BR>
<BR>
Email: omar@ecoconsulting.net<BR>
<BR>
<BR>
<BR>
EcoConsulting (Lebanon)<BR>
<BR>
Nahas Building, 4th floor<BR>
<BR>
4 St-Maron Street / Georges Haddad Avenue<BR>
<BR>
Postal Code: 2028 5806 SAIFI<BR>
<BR>
Beirut, Lebanon<BR>
<BR>
Tel: +961 (0) 1 971 255<BR>
Mobile: +961 (0) 3 045 045<BR>
<BR>
<BR>
<BR>
EcoConsulting (UK) Ltd<BR>
28 Marshalsea Road<BR>
London, SE1 1HF<BR>
Tel: +44 (0) 207 939 0989<BR>
Fax: +44 (0) 207 939 0981<BR>
<BR>
Website: www.ecoconsulting.net <<A HREF="http://www.ecoconsulting.net/">http://www.ecoconsulting.net/</A>><BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
</FONT>
</P>
</BODY>
</HTML>