One, can anti-theft doors be modified for ventilation?
Security doors can be modified to include ventilation. There are many security door ventilation window products available on the market, which can be easily installed on existing security doors by simply drilling holes and installing the ventilation window.
Two. Is it safe to install a ventilation window on a burglar-proof door?

Not very safe.
While security doors can be modified to include ventilation windows, this method is not recommended. This is because security doors undergo specific degreasing and rust-removal treatment during drilling. If ventilation windows are installed directly without this treatment, the resulting holes will be prone to rusting, and the steel plates will become brittle, thus reducing the security door's resistance to damage.
Therefore, if you genuinely require ventilation, when purchasing a burglar-proof door, it is recommended to opt for a model that comes with pre-installed ventilation ports.
III. Advantages of ventilated and burglar-proof doors
1、Ventilation and anti-theft doors feature large ventilation windows. We can simply open the ventilation windows for ventilation and air circulation, allowing the indoor environment to remain fresh and preventing stuffiness. This also enhances the brightness of the interior.
2. Doors with built-in ventilation openings not only can quickly remove indoor stale air, making the indoor air fresher, but also prevent insects from entering the room.
3、The ventilation openings in anti-theft doors typically use anti-pry steel mesh. The reinforced and thickened design prevents burglars from prying open the doors.