Hi Jerry,
Thank you for contacting Intel Community. For your information, to know the humidity environment of FPGA, you are recommended to refer to the Moisture Sensitivity Level (MSL) webpage:
https://www.intel.com/content/www/us/en/programmable/support/quality-and-reliability/msl.html
The different devices will have different MSL levels. Kindly refer to the MSL baking instruction for more details:
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/support/reliability/msl/msl-baking-instruction.pdf
Thank you
Regards,
Chia Ling
