Pierre,
Many times I've seen the vent hose pointed towards a vent in the attic, but not actually breaking through to the outside. I was actually surprised to see the requirement there.
IMO; in NY the existence of Building codes is still a new idea to most in the Electrical field. Until the recent adoption of the International Codes I had never seen a NY Building Code and still have no idea where the old ones were sold.
We sell the codes in our 'Store' here so I have access to all of them, but I have a copy of the Residential at my desk that I've tried to look into from time to time. I also have a copy of the New 2003 International Existing Building Code that I'd like to delve into when I get a chance just to see what might be coming.
Do you know if the numbering system in the NY codes follow the International codes? I keep forgetting to get the books side by side to compare them.
Bill