There is a dimensional drawing – its a bit rich to call it plans, but hey, its free!

Commercially available blast gatesĀ suck. They leak air, they’re a poor fit if you use PVC for your ducting, they jam up because of the design, and they fall apart because they’re held together with hot glue.

The blast gates I made solve all these problems.

You can also find the project template up on Inventables website, if you use Easel and want to hit ‘carve’.

Parts used:

Additionally you’ll need

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