"I was very pleased with this purchase, before I fitted this vent I was having freezing cold drafts coming from my tumble drier when it was switched off, so I replaced the downward facing vent for this vent with flaps. Problem solved ! Great value!! Easy to fit!!"
"I fitted one of these. Although cheap I found it useless. In the smallest breeze the flimsy flaps rattle open and shut. I would reccomend not to fit if anybody wants to sleep at night. It is now in the bin and I am trying a different brand.
PS I have just noticed that it says on the web "suitable for use with gas appliances" - Somehow I doubt that."