For those who would like to know more about the Micro vents,
please visit: jamestowndistributors website
and perform a search on Micro vents. There is information at the site.
I was advised to install the vent above the head. Traffic on the front of the deck, and the near location to the anchor may be in an area prone to accidents. Moreover, sleeping under a fan -- if installed above the front berth - - may be distracting. Good advice from an experienced sailor.