ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
*****************************************************************************

ok, so i've added an additional heater and things are working pretty good,
but still not up to my standards.
 
one of the variables is a tradeoff between temp and cfm.  the original
blowers were 750 deg. units with about 45 cfm.  the new blowers are 1000
deg. at 20 cfm. 
 
here's the question:  the heating elements in the old units are about 7
years old.  does the efficiency of these heating elements (meaning sustained
temp) stay steady or would it decline significantly over time.
 
the reason for the question:  it may be worthwhile to go back to the orginal
blowers but with new elements.
 
thanks for all those who have responded so far... 
 
 
 
Jeff Courtman
Exhibits & Special Projects Coordinator
251.208.6851
Exploreum Science Center
www.exploreum.net <http://www.exploreum.net/> 
 

***********************************************************************
More information about the Informal Science Education Network and the
Association of Science-Technology Centers may be found at http://www.astc.org.
To remove your e-mail address from the ISEN-ASTC-L list, send the
message  SIGNOFF ISEN-ASTC-L in the BODY of a message to
[log in to unmask]