get one of these to see if you really have a leak.

https://www.amazon.com/Portable-Infrared-Rechargeable-Detection-Troubleshooting/dp/B0CWRKJNXZ?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&smid=A24B79UAN02EUJ&th=1

it can be due to leaks from the perimeter of window or the sealed window it self.

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• 如果用手都能感覺到涼風，況且是自住， -金米- ♀ (237 bytes) () 10/31/2024 postreply 00:55:40