Hi
We have this type of air diffuser on our bedroom ceiling:
https://ibb.co/qMrNKVs
https://ibb.co/g9xg4Pn
As you can see in the pictures, there is nothing between the duct and the diffuser so lots of times we have seen small spiders crawling out of it and lately I have had hay fever and it feels like there’s a lot of dust coming out of it so I’m wondering if there is any kind of filter that we can add to it so all the dust and small insects are blocked out?
I have found air vent filters in Bunnings for rectangular vents that are probably for the floor vents, but I haven’t found anything for the square ceiling area diffusers.
try https://www.airwaresales.com.au at Underwood