[Greenbuilding] Question on tight house, carbon monoxide

[Anne Judge]

On Feb 17, 2012, at 2:23 PM, Reuben Deumling wrote:

> I've never understood the purpose of those vent hood fans that have no provision to connect to the outside? What is the point? Mix it up a bit while using electricity?

As far as I can tell, they're supposed to suck in & filter out the flying grease from your frying pan.  They usually have a grease filter (metal screeny-thing) and charcoal or similar filter.

Anne