[Greenbuilding] fresh air in a library

[Nick Pine]

> A $500 CO2 monitor might let the librarians know when more fresh air 
> is needed, so they can open the dampers. Or let the monitor open 
> motorized dampers.

They are a little cheaper now. Googling produced GE's 8002 for $272, 
with free shipping, here:

http://www.instrumart.com/Product.aspx?ProductID=18180

And an 8" motorized damper for $98.52, here:

http://www.cleanairsystemsinc.net/product-270.html

Nick