Trickle vents in windows- yes or no?

[Sparkysea]

Hi All
I am having some sash windows made and I am not sure whether to have trickle vents or not. Not sure if required by building control? and whether there are any real benefits in having them?
Thanks for your thoughts
Sparkysea

[Sparkysea]

Was going to have vent imbedded in top of wooden frame, but appreciate can be draughty. Not sure of regs

[Sparkysea]

Hi All,

OP here.

I live in south London and would not be able to open the front windows downstairs for very long. I live on a fairly busy street so security and noise is an issue. It's a victorian terrace and I will be replacing the windows so they are double glazed but look the same as the originals. However I am leaning towards trickle vents if I can close them. Having said this I don't think they are the answer to condensation on their own, as in my experience, they are just not big enough to prevent condensation... so this leads me back to reconsidering whether they are worth having!!

Thanks for the posting on the regs ...much appreciated. Appears in my case trickle vents would not be mandatory

[Sparkysea]

...opinions are really divided.
For those interested please see the link forwarded earlier
:http://www.glazpart.com/products/trickle-ventilation/about-trickle-ventilators/

Still not convinced they "extract pollutants" Living in London, air quality coming in will not be that great!