bought a -53VDC NMB blower for $20 as the air source (
http://www.surpluscenter.com/item.as...tname=electric ),
when I recognized that I could easily 'control' the air temp with parts on hand, the best kind
from a Lytron surplus MCS cooling unit I salvaged a ES0707 rad with a Comair Tarzan fan (yea, you can hear the scream)
fan
http://www.comairrotron.com/ac_family.asp?FamilyID=66
ES7070 rad
http://www.lytron.com/reg/files/Lytr...alog_hx_AL.pdf - nice to have rad specs, eh ?
the first (center) graph indicates, among other things, that an air flow rate of ~220CFM can be expected using this fan/rad combo
- I believe this is sufficient, with a Variac I can push it a bit
also added a link to an 8" blast gate I bought
would like a 5x5" opening, this means a 24" tube or a 20" sq duct
- am thinking that insulated duct may be the cheapest ?? (lg plastic pipe is pricey, got a source Ben ?)
EDIT
all these fans are far too small