Each of those are good thoughts? Your history taking skillz are very adept
![Smilie](images/smilies/smile.gif)
But ventilation is good.... furnace is realatively new(5 years) and just had its yearly cleaning and check up... great ventilation... no exhaust... I am stumped
![Frown](images/smilies/frown.gif)
but it seems fine for now LOL I just hate not knowing