Ex-environmental engineer. My last day was Friday.
In an industrial setting, when formaldehyde is part of the manufacturing process, you can combust the gases (e.g., a catalytic incinerator) or adsorb them into a carbon bed. That would mean a pretty large canister, and constant airflow to pump the air through it. Honestly, opening a window is how you get the formaldehyde out of an airspace like this.
The easiest method is don't use products that off-gas formaldehyde, but apparently someone missed that meeting.
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I can't read your signature. Sorry.
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