Use the force! The wind keeps it shut.

The Ecoflap is a patented design that ensures which ever way the wind is blowing, it blows itself shut and not open.

The force always pushes harder to close the Ecoflap rather open it. This is because pivoting in the middle, viewed from the front, the top of the flap has the larger surface area and viewed from the rear the lower part is largest, so the Ecoflap is always presenting its largest area to the draught, which blows it shut, not open.

It is so effective it withstands 100mph winds yet the subtle difference in balanced forces means it can open with a single sheet of paper.

Not only that but the flap will move completely up and out of the way when something is posted so the largest of items pass through without being trapped or wedging the flap open. That means no more torn papers and parcels caught in springs.

Video: How it works

Just 3 steps to save money and keep warmer and be draught free!