we have closed the vents in our master bedroom / master bath / and guest bath to try to get more heat into the girls bedrooms ( across the house).
there rooms are always cold...
When we close our bedroom vent to much - it starts to rattle - not fun to sleep under that.
Was goiing to throw more insulation above there rooms and see if we can keep the heat in there - but fans like this might be the way to go...
Steve AKA Doofus