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221001 Mailbox stop draft ! double seal valve — image 1
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221001 Mailbox stop draft ! double seal valve

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In our beautiful house the construction company failed to finish all details including an open mailbox. So when windy…

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Other Ideas
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In our beautiful house the construction company failed to finish

all details including an open mailbox. So when windy we loose a lot

heat through this hole. I decided to make a 2 stage seal by means

of a hatch system. unfortunately the box opening was 340 mm so I had

to cut in 2. The joint are made with 2.5 mm x 55 mm nails (1/10 inch) head cut of.

Works fine, draft is gone.

Printed in PETG, 25% infill.

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Category: DIY

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