Adjustable Diff. Tempstat Fan Speed Controller

[IntenseSense]

http://www.bghydro.com/BGH/itemdesc.asp?ic=AACGZTEMP1V

Anybody have experience with these. I'm trying to figure out if the fan always stays on, or if it shuts off once it reaches the set temp. I need to maintain negative pressure @ all times. I am hoping that the fan just slows way down once it hits the set temp.


thanks

 

[sanjuan]

I think you want the TV2 model:
http://www.grozonecontrol.com/TV2_en.html

 

[IntenseSense]

thanks, that looks like exactly what I need.