Outside air requirement
Outside air requirement
(OP)
I am designing the HVAC system of a storage/warehouse in laredo, Tx, which is supposed to be kept at 70 degrees F year round. I have been told by the building contractor that there are no people in this place. Am I still supposed to implement outside air into the design to confirm with ASHRAE requirements? The second part of my question is that I have ran the load calculation using Trane Trace and not sure if the system size is large enough. This storage is 1800 sq.ft. 20' ceiling, no load except lighting, which is about total of 400 Watts. R value of walls is 19, and ceiling is 30. Load calculation result is 2.1 tons, 1164 cfm. This is about 860 sq.ft./ton, which seems a bit too high of sq.ft./ton I am used to seeing.





RE: Outside air requirement
Dont have experrience with wharehouses, but I think the sqft/ton Rule of Thumb you are used to seeing is probably for office space etc (closer to 400?, just a hunch). So without windows and OA, the ROT may climb to close to what your seeing.
Now dont forget to ad the OA
knowledge is power
RE: Outside air requirement
http://www.ashrae.org/File%20Library/docLib/Public...
And
http://www.ashrae.org/File%20Library/docLib/Public...
RE: Outside air requirement
RE: Outside air requirement
The intent of 62 is safety. So if the material you store does not produce off gassing etc. And forklifts etc are not used in the space, then maybe. Again, I have never designed a wharehouse, (but have fought about the intent of 62 with LEED interpreters).
Builders want cheap, your job to design right. Send the builder an email, with the wording you describe and ask if that is what the building's intended use is, when he answers you by email, at least you have something to CYA.
knowledge is power
RE: Outside air requirement
RE: Outside air requirement
My energy code (2009 IECC) requires low leakage dampers, but allows gravity dampers for buildigns less than 3 stories.
Good Luck
knowledge is power
RE: Outside air requirement
RE: Outside air requirement