I can shed some light on this.  There are differences in room 
temperature guidelines because "room temperature" means different things 
to different people. 

It was the "other" pump company who revised its room temperature 
guidelines downward, and part of my job is to write the guidelines for 
my company.  I was interested in why this change occurred, so I called 
the IBCLC who made the change.  We discovered that the changed 
guidelines were based on a room temperature range of 72 to 79 degrees F 
(22-26 degrees C), while my company's guidelines were based on a room 
temperature range of 66 to 72 degrees F (19-22 degrees C).  The other LC 
said to me, "Nancy, here in Texas our room temperature never gets as low 
as 66 to 72 degrees."  I replied, "Barbara, here in Chicago our room 
temperature is 66 to 72  most of the year."  LOL!

To eliminate this confusion for moms, I decided to include *both* room 
temperature ranges on our materials.  To further set their minds at 
ease, I also wrote the article at the attached link to explain some 
other reasons differences in milk storage guidelines exist:

http://www.ameda.com/milkstorage/differ.aspx

Life is confusing enough!

Warmly,
Nancy Mohrbacher, IBCLC, FILCA
Lactation Consultant, Ameda Breastfeeding Products
In Chicago where it was -38 degrees F today with the wind chill

Michelle writes:

>About 5 years ago the duration of storage guidelines produced by a major pump manufacturer were revised, and fresh milk at room temperature recommendations were reduced by quite a few hours. The research supporting the revised guidelines is cited in their literature and on handouts they provide to clients that are available on their website. 
>  
>

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