[Bldg-sim] Warehouse ventilations to comply with ASHRAE 62.1

Sasa Pantic usrobotics011 at yahoo.com
Wed Jan 26 11:29:57 PST 2011


Hello Ashraf,
 


If you are reffering to a storage rooms,chemical Minimum exhaust rate is 1.5 cfm/ft2 as per ASHRAE 62.1-2007, Table 6-4.

Hope this helps.
Cheers,Sasa
 From: Ashraf Khan [mailto:ashraf at mecsd.com] 
Sent: Wednesday, January 26, 2011 9:25 AM
To: 'James V Dirkes II, PE'; bldg-sim at lists.onebuilding.org
Subject: RE: [Bldg-sim] Warehouse ventilations to comply with ASHRAE 62.1  James,  If we introduce 0.06 cfm.sqft, of outdoor air, if it complies with ASHRAE requirements, then we can do that.  Normally all warehouses here will be having ventilators to exhaust air which is assumed that air intake by infiltration.  Also project is located in DUBAI, UAE. Climate here is very hot and humid; if I introduce outdoor air it will affect the storage materials in the warehouse.   Did you know where can I find the exhaust rates, such as Toilets, Generator Room, pump room in ASHRAE?  Thanks & Regards,Ashraf  From: James V Dirkes II, PE [mailto:jvd2pe at tds.net] 
Sent: Wednesday, January 26, 2011 5:26 PM
To: 'Ashraf Khan'; bldg-sim at lists.onebuilding.org
Subject: RE: [Bldg-sim] Warehouse ventilations to comply with ASHRAE 62.1  Ashraf,  It seems that all you need to do is demonstrate that your ventilation system complies with Table 6-1.  Are you introducing at least .06 cfm/sq.ft of outdoor air with the mechanical ventilation system?  If so, just document it!  If not, you’re in trouble and will need to provide a ventilation system.        The Building Performance Team
James V. Dirkes II, P.E., LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653  From: Ashraf Khan [mailto:ashraf at mecsd.com] 
Sent: Wednesday, January 26, 2011 8:15 AM
To: 'James V Dirkes II, PE'; bldg-sim at lists.onebuilding.org
Subject: RE: [Bldg-sim] Warehouse ventilations to comply with ASHRAE 62.1  Hello James,  I accept that ASHRAE 62.1 is concerned with people, the same we explained to LEED Reviewer team, this is the comment we received,   However, since the project uses ventilator fans it is considered a mechanically ventilated space. Additionally, the LEED-NC v2.2 IEQp1 CIR ruling dated 10/8/2008 states that unless the mechanically ventilated warehouse has no human occupancy except for maintenance and repairs it must meet the requirements of ASHRAE Standard 62.1-2004. The narrative states that the warehouse will be occupied for the loading and unloading of goods; therefore, the warehouse is regularly occupied. Provide calculations for the warehouse space demonstrating that the space complies with the minimum requirements of ASHRAE Standard 62.1-2004.  I am not having any idea how to convince the team.  Thanks & Regards,AshrafFrom: James V Dirkes II, PE
 [mailto:jvd2pe at tds.net] 
Sent: Wednesday, January 26, 2011 3:46 PM
To: 'Ashraf Khan'; bldg-sim at lists.onebuilding.org
Subject: RE: [Bldg-sim] Warehouse ventilations to comply with ASHRAE 62.1  Ashraf,  ASHRAE 62.1 is concerned with people, who need ventilation (supply / intake).  For typical buildings, you may not need separate exhaust fans, because that amount can probably exfiltrate through cracks.  Supply and exhaust fans can be used in tandem if the building is fairly tight (no leaks).  Your MEP team’s  5-8 air changes per hour is for cooling, not ventilation.  Any building with which has that much infiltration is closer to a tent than a building! (It’s not closed up.)  The Building Performance Team
James V. Dirkes II, P.E., LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653  From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Ashraf Khan
Sent: Tuesday, January 25, 2011 11:55 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Warehouse ventilations to comply with ASHRAE 62.1  We received a LEED review comment regarding Warehouse ventilation to comply with ASHRAE 62.1-2004.  Generally depending on the warehouse storage, MEP team recommends 5-8 Air Changes per Hour by thumb rule for exhaust and air intake is assumed by infiltration by windows, open doors etc.. But this number I haven’t find in ASHRAE, please give me reference.  ASHRAE 62.1-2004, Table 6-1 for warehouse category says to have 0.06 cfm/ft2, is this number defines to intake or Exhaust? If it is exhaust, it is too small as volume of warehouse will be high.  Please share your ideas to comply with the requirements.  Thanks & Regards,Ashraf
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