These air conditioners are generally made of chromium. Specifically, pipes and case are made of chromium, then are covered by aluminum and double epoxy primer and epoxy paint. So harmful gases cannot penetrate electrical panels.
These air conditioners are resistant to acidic and corrosive effects of harmful gases that emerge during the heating process in cement factories or in driver rooms or panels in treatment plants. They are 100% gasproof. These air conditioners are manufactured with cooling power ranging from 5 kW to 300 kW.