What is a window filter, and what does it do?

The window filter in brief

A window filter is a screen that filters the air coming in through an open window. It fits to the window frame or an insect screen frame just like insect mesh. The difference lies inside: in the middle of the Odera window filter there is a nanofiber layer made of fibres too fine to see. This layer lets air through but catches dust and pollen particles in the air.

As a result, your home keeps airing while the window is open, while a large share of the dust, pollen and tiny insects outside stays in the filter.

What does it do?

• Reduces the dust that gets in while the window is open. Windowsills and furniture get dusty more slowly.
• Reduces the pollen that gets in. In spring and summer it makes a difference for people who want to sleep with the window open, especially in the bedroom.
• Stops tiny insects. As well as flies and mosquitoes, it keeps out tiny insects such as sand flies that can pass through ordinary mesh.
• Eases soot and smells from outside. Holds back some exhaust, chimney and barbecue smoke.
• Gives privacy. With the dark side facing out, it is hard to see in from outside.

What other names is it searched for under?

The window filter is known by several different names for the same product: window dust filter, window pollen filter, dustproof insect screen, pollen-proof insect screen, new-generation insect screen, nanofiber insect screen, window air filter and pollen screen. They all meet the same need: letting the air in through an open window while keeping dust and pollen outside.

Where does it go?

• On opening and fixed windows
• On balcony and garden doors
• On vents, air inlets and cooker hood outlets
• On greenhouse, coop and storeroom vents

The hook-and-loop model fits directly to the window frame, while the roll model goes into your existing insect screen frame in place of the mesh. We compare which suits you on the products page.

How is it different from an ordinary insect screen?

Ordinary insect mesh is only for insects; its holes are large enough for dust and pollen to pass through easily. A window filter holds back both insects and fine particles in the air. For a detailed comparison, see the differences between a window filter and an insect screen page.

To be honest

Like any filter, a window filter slows the airflow a little. On windy days you will hardly notice; on very still days the room may take a little longer to air than with an ordinary insect screen. Because of the filter’s texture, the view also looks slightly duller than through mesh. Most of our users see this as a small difference in return for being able to open the window without worrying about dust.