Originally Posted by troidus
Move too much air in a tight house and you'll be pulling flue gasses into your living space, unless you go with a make-up air system.
It would have to be a very tight house to do that IMHO. If the house is that tight you are probably going to have moisture problems over the whole house (i.e. mold).
"I have approximate answers and possible beliefs and different degrees of certainty about different things, but I am not absolutely sure about anything." Richard Feynman, Scientist.