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Step 9Making the Vent Cap
Since this is a confined space and you are a Human who must breath oxygen to survive it is important to allow for adequate ventilation to allow for this. The Vent Capt at the top of the dome allows for stale air to flow out of the dome and fresh air that is pumped in from the ventilation system to flow in. There will always be a positive air flow coming out of the top vents when the door is placed on the front, and the air pump is turned on, this makes for a very cool and pleasant environment.
Start by selecting any one of the Pentagon pieces, weather you have painted it or not is not important. Turn over the Pentagon and find the center of the pentagon, measure outward with a compass and start marking the 5" mark all the way around. This will make a 10" circle.
Next measure inward from the edge of the triangle sides to find the center point, this should be at about 3" from the edge. Mark that point on each triangle.
Use a 3" hole saw on a drill motor to cleanly cut out each of the 5 holes you will need, then you will need to buy 5ea 3" attic vents from a Home improvement store, these will need to me cut down to about 1/4" from the edge of the face to allow them to be almost flush with the inside of the cardboard when inserted.
After you cut all 5 vents down to size, put a small amount of caulking around the inner edge and insert them into the Pentagon. BE SURE TO NOTICE WHICH WAY THE VENT SLOTS ARE GOING, THEY SHOULD ALL BE THE SAME.
Then paint the outside to match the rest of the dome and you are done with this step.
Start by selecting any one of the Pentagon pieces, weather you have painted it or not is not important. Turn over the Pentagon and find the center of the pentagon, measure outward with a compass and start marking the 5" mark all the way around. This will make a 10" circle.
Next measure inward from the edge of the triangle sides to find the center point, this should be at about 3" from the edge. Mark that point on each triangle.
Use a 3" hole saw on a drill motor to cleanly cut out each of the 5 holes you will need, then you will need to buy 5ea 3" attic vents from a Home improvement store, these will need to me cut down to about 1/4" from the edge of the face to allow them to be almost flush with the inside of the cardboard when inserted.
After you cut all 5 vents down to size, put a small amount of caulking around the inner edge and insert them into the Pentagon. BE SURE TO NOTICE WHICH WAY THE VENT SLOTS ARE GOING, THEY SHOULD ALL BE THE SAME.
Then paint the outside to match the rest of the dome and you are done with this step.
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