Inspected an 80 year old recently remodeled home today. There was a small brick chimney from the crawlspace up through the roof that I suspect used to exhaust whatever system originally heated the home. It was no longer used for any kind of furnace. A typical attic installed forced air funace was present in the attic with its vent through the roof as is typical.
The remodeler had run the dryer vent through a transition box in the new laundry room up aluminum flex duct then into the small chimney.
Then above in the attic they had installed a new natural gas water heater (new to the attic I suspect) and run the exhaust vent for the water heater into this same small chimney.
I do not see this type of stuff around here much. Several questions.
Is this permissible in general? Using the old chimney in this manner at all? If so, is it okay to use it for these two appliances together?
The small chimney had no cap of any kind. I have some concerns that water could enter the vents of the two appliances. Also that wind could cause the appliances to either not vent well or even back draft on themselves, or back draft the water heater vent into the dryer.
I did not like the setup. But not sure how to call it out or if I should.