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Air vents are placed based on the required cfm load calculation per room not necessarily set at specific square feet apart. But you need to make sure that supply and return air are not close to each other. Supply air vents should be placed close to outside walls and return air close to interior central walls.
It has two vents with candycanes and chocolate
a lot
Hydrothermal vents can get very tall. Many of them are as tall as a three story house.
2 million and 666 vents and it will erupt on new years 2012
11
Yes Mount Fuji has vents.
Mount Etna one of the most active volcanoes in the world is made up of two central craters. The volcanoes sides have many vents each of which can erupt independently of each other.
Yes, Mt. Erebus does have secondary vents. There are many of them, and they are located close to its inner crater.
It has 5 I think
Delta Airlines will do this trip for 25,000 Frequent Flier miles.
Insufficient capital needed to achieve economy of scale.