Can a Funnel Improve Airflow in a Greenhouse Inflator Using PVC and a Vane?

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SUMMARY

The discussion centers on the effectiveness of using a funnel on the intake end of a greenhouse inflator made from 4" PVC and a vane. Participants argue that while theoretically a funnel should not enhance performance due to the principles of pressure, practical considerations suggest that airflow is crucial for maintaining inflation. The consensus leans towards skepticism about the funnel's benefits, indicating that it may not significantly improve the system's efficiency.

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  • Knowledge of PVC pipe applications
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RandallPink
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We are trying to make an inflator for the double roof on a greenhouse using 4" pvc and a vane on the back to keep it pointed into the wind. There is a lot of disagreement on whether a funnel on the intake end will make it work any better than just the 4" pipe facing into the wind.
 

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Theoretically, a funnel shouldn't help because pressure is pressure and you can't multiply it, but in reality the system isn't closed and you'll need airflow through it to keep the greenhouse inflated. I think it may be a losing battle, though.
 

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