[infowarrior]

I want to have a few more openings in my greenhouse for when the summer comes for ventilation. Anyone know of any good type of vents to use??  I don't really want to spend alot of money (if any). I was maybe thinking of just cutting a few holes in my perspex and putting some of that netting over and siliconing it on. Any other suggestions appreciated.

              Cheers.

[Bobby T]

I use a house air vent sliding cover.Cut hole slightly smaller than external dimensions silicone on or use self tapping screws.
 Place as low on wall as possible for max. air flow.They come with built in insect screen and can be slid closed during cold weather.Mines on its second season.    Bob.

[infowarrior]

Ok cheers.  Where did you get that from??  I want to try to get large vents if poss.

[Bobby T]

They are meant to to cover the airbrick inside house.Bedrooms,bathroom ect.Any B&Q,big shed or plumbers merchants will stock them,lots of sizes.Mine is about size of two bricks,one on top of tother.Hope this helps  Bob.