Seems the homeowner had added (2) more power ventilators since my original inspection.
So basically, all that power trying to suck the hot air out pulled air down the w/h flue? That's some powerful stuff. Was the draft hood still in place on the w/H?
I'll bet they did not all any soffit vents to balance out the exhaust. Seems like I remember reading that somewhere... Oh yeah, the manufacturer's instructions!
Rick were you just being a good guy or were they trying to throw this back on you?