Cold Air coming in through bathroom exhaust fan
I just moved into a fairly new house (3 years old) and now that the weather has turned more winter-like, I'm noticing that cold air is pouring into the bathroom via the exhaust fan.
Strangely enough, there is no vent to the outside so this is clearly dumping the exhaust into the attic and while I did go up there, there is no visible fan anywhere to be found. It is in an odd spot in a corner of the roof so very little clearance in that spot.
My question.....is there some type of "flap" or something that is suppose to open when the fan is on and then close when the fan is off (much like a dryer vent)? Anyone have any ideas on how to resolve this problem?