[Bldg-sim] How much fan power included in EER / SEER ratings?

[RobertWichert]

Actually I wold expect the ARI testing to be done with 0.5" of static,
which is normally the "rated" static anyway.

I don't see any need to call this "significantly underestimating" the
energy use.  If you design to 0.5" of static, you're good to go.



-- 
Robert P. Wichert, P.Eng.
+1 916 966 9060
FAX +1 916 966 9068




================================================



Crockett, Jim wrote:

>My understanding (from very unofficial sources found while googling) is
>that when units are tested per ARI 210/240 (or 340/360), they are tested
>with a clean filter and minimal ductwork (total static of around 0.3").
>Thus, you would need to back this minimal amount of energy from the EER,
>and then add the actual fan energy.
>
>If you simply use the rated EER with no adjustment, and set your supply
>fan energy to zero, (as was recommended in the archives), then you will
>significantly underestimate your fan energy.
>
>So, is anyone familiar with the ARI 210/240 or 340/360 tests, and know
>how much fan energy is included in these tests?  Also, is the included
>fan energy different for packaged units vs. split systems?
>
>Thanks,
>
>
>
>Jim
>
>
>
>
>-----Original Message-----
>From: RobertWichert [mailto:robert at wichert.org] 
>Sent: Wednesday, November 04, 2009 8:54 AM
>To: Crockett, Jim; BLDG-SIM
>Subject: Re: [Bldg-sim] How much fan power included in EER / SEER
>ratings?
>
>Here is my favorite, from the archives.
>
>http://lists.onebuilding.org/htdig.cgi/bldg-sim-onebuilding.org/2007-Oct
>ober/005987.html
>
>
>
>
>Crockett, Jim wrote:
>
>  
>
>>How much fan power is included in the EER / SEER ratings for packaged 
>>systems, and split systems? I want to make sure I'm not 
>>double-counting fan energy.
>>
>>Thanks,
>>
>>Jim Crockett, P.E.
>>
>>Senior Project Engineer
>>
>>Energy & Carbon Management
>>
>>Nexant, Inc.
>>
>>4021 S. 700 E., Suite 250
>>
>>Salt Lake City, Utah 84107
>>
>>(801) 639-5603 - phone
>>
>>(801) 266-4786 - fax
>>
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