calculate passive intakes

[sMACkaddict]

ok, well thats good and reinforces what we all thought/knew...


sMACk

 

[sMACkaddict]

I would be interested to see what people with hvac backgrounds have to say. The area the calculator spits out is pretty large. Considering the area of a 6" duct is about 28", getting up to over 100 sq in would be difficult.

I was planning on usong 90 pvc elbows but using 4" pvc i would need almost 10 intakes. And 4" pvc elbows arent cheap!

Pretty interesting though.

Thanks for all the input!

the surface area for the opening of a 6in duct is like 113 sqin, so that is almost dead on track with what Hemp Goddess was suggesting.

sMACk

 

[old timer 4311]

Isnt area = pie*r squared?

So r=3 area = 28"

 

[sMACkaddict]

ha... that is correct, my bad, forgot that 6" isnt the radius! whoops!

ok so where does that leave us...

sMACk

 

[tastyness]

Oh all you math geeks are having a blast I see.
Resume calculating.

 

[dman1234]

I would cut a hole the size i think is right and then just enlarge it if needed during a test run i would do with no plants. jmo