Hello! I have a bathroom ventilation question:
Short Question: How do I know if a seemingly not functioning bathroom vent is because of the vent fan itself or due to some other flawed aspect of the design? Also, do vent fans generally have standardized cutout sizes?
Longer background to question: I have a very old 210-ish year old home (gutted and renovated in 1887) whose two small full bathrooms had no ventilation prior to us purchasing the house. Thus, the bathrooms had peeling wallpaper and paint and tons of condensation and water streaking everywhere after even the fastest hot shower when we moved in.
One of the first things we did when we bought the home was to have ventilation ducts installed communicating with the outside and we purchased Air King systems (#1 in Consumer Reports) for 80 square foot bathrooms. The larger of the two bathrooms is 6 by 10.
Basically, since doing so last year, it's as if we never did it. Mirrors fog immediately, water streaks on the walls and it's starting to stain our ceiling that was painted only one year ago. Nothing clears condensation-wise until the bathroom door is open. The shower is almost directly under the vent too to add insult to injury... And again, we're talking under 5 minute showers.
What's the problem here? How do I even find out the problem? Who do I call? Do I have a different vent fan installed? Was it a flaw in the venting outside itself? I've heard some people claim that only Panasonics work well.
Any help would be appreciated.