Ilmastoinvalisin

I'd be happy to generate a wiki-style article about "ilmastoinvalisin," but I need a little more information. "Ilmastoinvalisin" appears to be a Finnish word. Could you please tell me what "ilmastoinvalisin" refers to? For example, is it a type of air conditioning indicator, a specific component in a ventilation system, or something else entirely?

Once I understand the subject, I can create a concise and informative wiki-style article for you.