<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-9">
</head>
<body text="#000000" bgcolor="#FFFFFF">
Dear All,<br>
<br>
For a LEED project we are modeling a research laboratory building
where in the proposed case most of the lab spaces are provided with
6 ACH during occupied and 2 ACH during unoccupied periods for health
and safety reasons.<br>
<br>
I am assuming that the corresponding HVAC system for these spaces
would be defined by G3.1.1 Exception d and that separate HVAC
systems shall be provided for each laboratory space with more than
5000 CFM exhaust.<br>
<br>
Assuming my approach is correct, the question is how to model this
in eQuest? We are inputting ACH values at zone level. Is there a way
of dynamically adjusting these ACH values on an hourly basis (ie.
schedule?). When G3.1.1 Exception d requires that exhaust and
make-up air volume be reduced to 50% of design values during
unoccupied periods, is the correct approach to provide 6 ACH
(=proposed flow rate) during occupied and 3 ACH during unoccupied
periods?<br>
<br>
Thank you for any responses,<br>
<br>
Omer Moltay, LEED AP BD+C, ASHRAE BEMP, ASHRAE CPMP, BREEAM Assessor<br>
Mimta EkoYapi<br>
Hekimsuyu Cad. 559. Sk. No:39<br>
34255 Kucukkoy Istanbul Turkey<br>
Tel: 90-212-617-2296<br>
Fax: 90-212-617-2297<br>
<a href="http://www.eko-yapi.net">www.eko-yapi.net</a><br>
<br>
</body>
</html>