Can I turn an airbrick into a catflap?

[catflapdrama]

Sorry, I know there have been previous posts about catflaps in walls but this is a new twist......I have an airbrick in the outer cavity with a concrete tunnel from the inside to the outside, so in theory all I would have to do is knock out the gridwork within the airbrick and fit a catflap. But is the airbrick likely to be loadbearing in anyway and would I need to fit a lintle?
This is driving me somewhat insane so if anyone could shed any light that would be great!

 

[freddiemercurystwin]

Your wall won't fall down even if you remove the whole airbrick.

I believe cats can technically get through a hole no bigger than their head but will he actually be happy to crawl through such a slim opening on a regular basis? ie if he was being chased he may get though but would he be prepared to otherwise? Why not just core drill a suitably sized hole through?

 

[catflapdrama]

I'm lucky that its one of the square airbricks c220mm x 220mm so sounds like an easy ish job (hopefully!). thanks for your reply

 

[Aqua]

As freddie says the air brick isn't load bearing in the way you're thinking. What do you have on the inside, a plastic grill type vent cover?

Bet there'll be quite a draft through it by the time you've made it into the cat's front door

 

[catflapdrama]

Wooo-hoo. Done and siliconed. Not bad for a girl! Thanks for all the help!
PS - less draughty now as it was just an open hole on the inside and wide brick gid on the outside so a bit less draughty which is a bonus. Cat won't go near the damn thing yet though. Will have to put her dinner the other side until she either starves or gives in and goes through!!