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

Crockett, Jim Jcrockett at nexant.com
Thu Nov 5 06:59:58 PST 2009


This is perfect, thanks!  I also downloaded the 210-240 standard.




-----Original Message-----
From: James V. Dirkes II, PE [mailto:jvd2pe at tds.net] 
Sent: Wednesday, November 04, 2009 6:52 PM
To: 'RobertWichert'; Crockett, Jim
Cc: 'BLDG-SIM'
Subject: RE: [Bldg-sim] How much fan power included in EER / SEER
ratings?

The Standard is available on the AHRI Web site at
http://ari.org/Content/FindaStandard_218.aspx?Listing_PK=143

All fan energy must be included and that is calculated using a minimum
external static pressure that varies with capacity (See Table 5)


The Building Performance Team
James V. Dirkes II, P.E., LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653
 

-----Original Message-----
From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of
RobertWichert
Sent: Wednesday, November 04, 2009 8:14 PM
To: Crockett, Jim
Cc: BLDG-SIM
Subject: Re: [Bldg-sim] How much fan power included in EER / SEER
ratings?

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-Oc
t
>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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>



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