All burns should be treated with either cold running water or an ice pack. Water is preferable.
You do not ever want to block or restrict air flow to a return air grille.
Yes
Nearest to the thermostat.
After running the students are (cold) sandwiches. Sandwiches should be underlined.
Obviously you have a cold if you are constantly blowing or you have something spicy or you are crying
in the refrigerator
is your fan running in the correct direction? are any of your ducts blocked?
That you should put on a sweater and you don't have night blindness.
Open, that`s where the cold air is.
No. Getting out in the sun may help get rid of a cold, but running or any physical exercise is contraindicated (not good) when you have a cold. Your body needs rest to do the work to get rid of your cold, so you should avoid strenuous exercise like running if you want to get rid of a cold faster.
A supply duct connected to the return duct somewhere? Fan running backwards?