[Bldg-sim] OT fresh air

[David Eldridge]

You should check with the design team to see what the governing codes are from the local authorities. In terms of ASHRAE references, 2011 Handbook of Applications Chapter 8 or Standard 170 will take precedence over ASHRAE 62.1, since the criteria in this case is for infection control purposes which goes beyond the comfort requirements in 62.1. There are a number of other references that the design team might be using. These might include the client’s own design standards which may be even higher than the regulatory requirements.

Regarding your prior post about the reheat – it will be a significant quantity, this is typical. However for reheat to be higher than the cooling end-use during a peak summer month should be reviewed. Assuming your location has economizer hours in the winter, the reheat could easily be higher than the cooling on an annual basis unless the design is including measures to reduce the need for reheat.

David



David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, BEAP, HBDP
Grumman/Butkus Associates



From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Sambhav Tiwari
Sent: Monday, March 04, 2013 3:52 AM
To: bldg-sim
Subject: [Bldg-sim] OT fresh air

Hi All,
         Is there any ACPH  recommende value for operation theatre given in ASHRAE 62  standards It is 100% fresh air AHU . but the cfm sized  is very high 6cfm/sqft as per design and if i reduce it to 3cfm/sqft i am still not getting any discomfort hour.

Thanks
Sambhav.
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