HDB BOMB SHELTER VENTILATION COVER

[Windywoowoo 0]

Hello! 
I am trying to find ways to make my bomb shelter ventilation nicer. Saw on carousell and some people on the site using some plaster cover, but cost $75-$100. 
 

Anyone tried buying air vent covers to try? Saw on Shopee less than $10. Will do the plastering and repainting to make it nice. But just want to know whether it works. Thanks!

[snoozee 97]

note that you are not allowed to make any modifications to the vent itself as it is against the law. 
even though the regulations allow for the vent to be partially covered during peace time with architectural fittings and such, it explicitly mentioned against "Modifying, altering or tampering with any part of the ventilation openings, plates and the mounting devices such as bolts and nuts."

The plastering of the vent hole would most likely fall under "modification, alteration" and hence is illegal no matter what the seller tells you. if you want to be clear, can always contact SCDF for clarifications.