Rake overhangs are not as critical to vent as are the rafter spaces above the living areas, but for the sake of appearance, the entire ridge is usually covered with venting.
To seal the ridge from weather. If a ridge vent is used it is just that, a vent for the roof.
There are screws in between the slats of the vent cover.
ridge vent and powered
A shingled roof requires ventilation. That can be done several ways. Gable vents, turbine vents, air hawks or ridge vent. It is also important that your soffits are vented to get proper airflow.
Vent covers are manufactured in many different sizes to be able to fit all vents. The purpose of a vent cover is to protect a vent from allowing rain to enter, while still allowing air to circulate.
It wont hurt anything to leave it open even with the furniture over it, but if you want, you can take a towel and plug up the airflow from the vent. This will only make the other vents in the house blow a little more air than normal. just take the vent cover and put it back into place over the towel.
Vent covers are manufactured in many different sizes to be able to fit all vents. The purpose of a vent cover is to protect a vent from allowing rain to enter, while still allowing air to circulate.
Because it will over-heat - causing the thermal fuse to trigger, shutting the computer down.
I had the same problem with my 2000 Passat. According to my mechanic (an excellent independent), the vent cover over the bulbs is not removable without breaking it out. So you may need to buy a new bulb and a new vent cover ($100+).
WHICH VENT If you're talking plumbing roof vents or soffit or ridge attic air vents; absolutely not!! I can't thing of a single vent that would be opened and closed at will.
jesus
To seal the ridge from weather. If a ridge vent is used it is just that, a vent for the roof.