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NC-2009 IEQp1:Minimum IAQ Performance

warehouse and storage room difference - table 6-1

What is the difference between storage room and warehouse in table 6-1 of ASHRAE 62.1-2007? Storage rooms need twice the ventilation required for warehouses. Is it correct to say that the difference is mainly in area, storage rooms being smaller and warehouses being larger? Both spaces are marked with a "B" meaning that the ventilation may depend on the type of material stored ("rate may not be sufficient when stored materials include those having potentially harmful emissions."). Thanks in advance!

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Fri, 08/08/2014 - 12:43

The difference is area. Warehouses are meant to have a lot of operational space which decreases storage density.
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Rudolph Carneiro
HVAC consultant
Optimized Systems
LEEDuser Basic Member
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Fri, 08/08/2014 - 13:32

Another factor is that a warehouses' vertical height is much greater than for storage rooms and therefore air from chemical contents in storage rooms more quickly saturates the air with polutants. Read the section in ASHRAE 62.1 on time averaging. Andrew: do you know if GBCI has incorporated time averaging into the v5 IEQP1 template? Its obvious to me that they have not since there is no room height input.

Fri, 08/08/2014 - 14:20

I think you answered your own question correctly. They do not have inputs for room height or occupancy schedules. The time average is only useful for spaces with high intermittent occupant loads.

Mon, 08/18/2014 - 04:11

Thank you!
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Rudolph Carneiro
HVAC consultant
Optimized Systems
LEEDuser Basic Member
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Thu, 09/11/2014 - 05:45

Andrew: I think It's usefullness is directly related to how much an owner can save yearly when reducing OA rated by 10 to 20%. I am seldom involved in a project that does not have any intermittently occupied spaces. But even so, a space that isnt intermittently occupied should also be time averaged. Offices spaces for example can get close to 10% reduction in OA flow rates when time averaged.

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