to keep people healthy and continuous flow of fresh air.
Mainly to prevent mould from contaminating the grain.
If using it for its intended purpose then ensure the room is well ventilated. Otherwise leave the top on.
The verb for ventilation is ventilate.Other verbs are ventilates, ventilating and ventilated, depending on the tense you need to use.Some examples are:"I will ventilate the room"."He ventilates the room"."The firefighters are ventilating the smoke out the house"."The offices are well ventilated".
convection
no
Because the vapours and fumes from many glues are dangerous ! No kidding, this is serious.
Wear gloves and keep the room ventilated!
Keep the boat well ventilated
The EarthWatts can overheat, but under normal circumastances in a well-ventilated room, should be fine.
When you are a hairdresser, you have to deal with the chemicals and smell of hair dye and perms. This can be dangerous over time, so wear a mask when you can and try to have a well ventilated room.
They can be dangerous to breath in if you are using them very often , if you are uaing a dark room to develop them yourself make sure that it is well ventilated.
(This is assuming you have not turned off the gas supply and that you are indoors in a not very well ventilated room). The gas would leak out and the next time you lit a flame in the room it would explode.