Washington state has some of the best energy codes in the nation. This 2003 Field Guide is helpful even in places where energy codes do not exist.
As an example, see Chapter 9 "wood stoves and fireplaces" for help on providing outside air to combustion appliances.
http://www.energy.wsu.edu/code/code_support.cfm
Thanks. Got the ventilation stuff loading now.
(I hate .pdf files--but then this computer is trying to die on me, so that may be why)