We have a home built in 2008 in west-central Minnesota. As a cost-saving (I perceive it as such, and may be mistaken) measure to fulfill air quality and venting code, the builder set up an upstairs bathroom's exhaust fan to run on a timer - something like 45mins of every hour. It's apparently designed to replace the entire house's air volume once each day.
The switch can also be flipped up to run the fan on demand, and turns the fan off when flipped down. I'm not sure if the timer has any relation to whether the switch is on or off, though.
I've been thinking of either adjusting the timer so it runs less frequently, or disabling it entirely (with an easy option to re-enable it).
Any thoughts? What should I look for? Is there a timer at the fan, or is this something a little more intricate at the switch? Would this be a two-way switch with one end controlled by the timer?